diagnostic manual - mahindra-direct.co.nz · ... mahindra ltd. © 2007 mahindra & mahindra ltd...
TRANSCRIPT
The reproduction, translation, transmission, in part of whole of the present document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd. © 2007 Mahindra & Mahindra Ltd
SCORPIO Vlx
DIAGNOSTIC MANUAL - ABS
Revision 1 MAN-00030
922BRKR011107EN-DM
RELEASED BY : TECHNICAL PUBLICATION CELL MAHINDRA & MAHINDRA LTD Rev 1 – NOVEMBER 2007
CONFIDENTIAL • ONLY FOR INTERNAL CIRCULATION WITHIN
M&M AUTHORISED DEALERS & SERVICE CENTRES • PASSING ON TO THRID PARTY IS NOT PERMITTED • ALWAYS CHECK FOR THE LATEST VERSION
TABLE OF CONTENTS 1. INDEX OF COMMONLY USED TERMS 3 2. INDEX OF DTC CODES 5 3. WIRING DIAGRAM 7 4. DTC BASED DIAGNOSTICS 8
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 3 of 62
Index of Common Terms Used
DTC: Diagnostic Troubleshooting Codes ABS Lamp: Yellow lamp in cluster with the ABS written (photo to be inserted) Parking Brake Lamp: The parking brake lamp & the FLWI lamp is a combined red lamp. (Sketch required). The ABS errors will also be shown through this red lamp. DRP: Dynamic Rear Proportioning Note: DRP is equivalent to electronic LSPV. It is active only when the rear wheels are tending to lock. ABS : Anti Lock Braking System Note: ABS is active only in the extreme condition when the front wheel lock is taking place. In normal operation the braking does not activate the ABS functionality. Also the brake pedal pulsation when the ABS is active is normal Note: When the lock takes place normally the rear tend to lock first hence initially the DRP kicks in. Then the second stage if the front is locking then the ABS also becomes active. Under severe panic braking the front wheels can lock first or all the four wheels will tend to lock. Under this condition the ABS will come into operation immediately. WSS: Wheel Speed Sensor Front Toner Wheel: Is mounted inside the disc for front wheel spped signal to ABS ECU & serviced with disc & toner assembly & not serviced individually Rear Toner Wheel: Is mounted on to differential case assembly & serviced with differential case & not serviced individually for rear wheel speed signal to ABS ECU EOL: End of the Line (Only in the assembly line) Note: Clear all the DTC codes before giving the vehicle back to the customer. Any unhealed code should be attended and then only the vehicle to be released. It is recommended that when ever the vehicle reports to the workshop, the DTC codes should be checked & using print command in software save the image of error codes to maintain vehicle history. The status of the code (healed or not present) when it came to the workshop as well as before leaving the workshop, should be printed. (Use the print command in
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 4 of 62
the diagnostic, converts to a PDF file, later the PDF file to be printed. This record should be kept in the vehicle history and can be useful later.) After clearing all the ABS related errors drive the vehicle and do at least 5 ABS braking application and check if any errors are recorded. Suggestion is that the vehicle speed should not exceed 50 Km/hr when doing the panic braking to check ABS performance. ISO : Isolation valve DUMP : Dump valve
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 5 of 62
Index of DTC Codes
Code Description Page # 1800 WSS Open – Front Left 8-9 1801 WSS Open – Front Right 8-9 1802 WSS Open – Rear 8-9 1803 WSS Short – Front Left 10-11 1804 WSS Short – Front Right 10-11 1805 WSS Short – Rear 10-11 1806 WSS Missing – Front Left 12-13 1807 WSS Missing – Front Right 12-13 1808 WSS Missing – Rear 12-13
1809 WSS Erratic – Front Left 14-15 180A WSS Erratic – Front Right 14-15 180B WSS Erratic – Rear 14-15 180C WSS Drop Out – Front Left 16-17 180D WSS Drop Out –Front Right 16-17 180E WSS Drop Out – Rear 16-17 180F Mismatch Tyre 18-19 1810 Solenoid Open–ISO Front Left 20-21 1811 Solenoid Open–ISO Front Right 20-21 1812 Solenoid Open – ISO Rear 20-21 1813 Solenoid Open–Dump Front Left 20-21 1814 Solenoid Open–Dump Front Right 20-21 1815 Solenoid Open – Dump Rear 20-21 1816 ISO Front Left Solenoid -Driver Shorted 20-21 1817 ISO Front Right Solenoid -Driver Shorted 20-21 1818 ISO Rear Solenoid -Driver Shorted 20-21
1819 Dump valve Front Left Solenoid -Driver Shorted 20-21
181A Dump valve Front Right Solenoid -Driver Shorted 20-21
181B Dump valve Rear Solenoid -Driver Shorted 20-21 181C Valve solenoid ISO valve Front Left 22-23 181D Valve solenoid ISO valve Front Right 22-23 181E Valve solenoid ISO valve -Rear 22-23 181F Valve Solenoid Dump–Front Left-Shorted 22-23 1820 Valve Solenoid Dump–Front Right-Shorted 22-23 1821 Valve Solenoid –Rear Dump-Short 22-23
1822 Valve Solenoid-ISO Front Left- Over temperature 24-25
1823 Valve Solenoid-ISO Front Right- Over temperature 26-27
1824 Valve Solenoid-ISO Rear- Over temperature 26-27 1825 Valve Solenoid - Dump Front Left - Over 26-27
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 6 of 62
Temperature Code Description Page #
1826 Valve Solenoid - Dump Front Right - Over Temperature 26-27
1827 Valve Solenoid - Dump Rear - Over Temperature 26-27
1829 Power Switch - Shorted 28-29 182A ABS Motor - Open 30-31 182B ABS Motor - Locked 32-33 182C ABS Motor – Open Fuse 34-35 182D Microprocessor ROM Failure 36-37 182E Microprocessor RAM Failure 36-37 182F Microprocessor Stack Failure 36-37 1830 Microprocessor Schedule Overrun Failure 36-37 1831 Microprocessor External watchdog Failure 36-37
1832 Base brake fluid sensor – open Base brake failure 38-39
1833 Ignition Voltage Supply low 40-41 1834 Ignition Voltage Supply High 42-43 1835 Ignition Voltage Supply – Excessive High 44-45 1836 Microprocessor Unimplemented Interrupt. 46-47 1837 Microprocessor Unexpected Exception. 46-47 1838 Microprocessor Solenoid Timeout Failure 46-47
1839 Microprocessor HET Periodic Interrupt Failure. 46-47
183A Microprocessor SPI Failure. 46-47 183B Microprocessor SPI Queue Overflow 46-47 183C Brake Pedal Switch Failed – Never Active 48-49 183D Brake Pedal Switch Failed–Always Active 48-49 183E Tooth count Failure (Out of Range) 50-51 183F Tyre Size Failure ( Mismatch/ out of range) 52-53 1840 Emission Rollers Mode Active 54-55 1841 Invalid Drive-train configuration 56-57
1842 Communication Missing Transfer Case Status 58-59
1843 Communication General K-Line Fault 60-61
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 7 of 62
Circuit Diagram –
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 8 of 62
ABS Trouble Shooting
Description –
DTC Error Description
Effect of DTC
1800
1801
WSS Open – Front Left
WSS Open – Front Right
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
1802 WSS Open – Rear
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: WSS output signals out-of-range
• Defective wheel speed sensor • Defective wiring harness to wheel speed
sensor • Defective Microprocessor or Printed
Circuit Board in the ECU. • Electrical Pins bent of ECU or WSS
1800
1801
1802
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 9 of 62
Trouble Shooting –
1800
1801
1802
After replacement of the required component, connect the wiring harness to Sensor & EHCU. Switch on the Ignition & confirm if the error is healed.
Change the wiring harness. (Wiring Harness Part # - Refer Table A)
Check continuity in wiring harness - between sensors’s mating connector to EHCU mating connector (Low to Low & High to High).
If Yes If No
The problem exists either in ECU or WSS.
Change the respective WSS as per the DTC codes. (Front WSS Part # - Refer Table A Rear WSS Part # - Refer Table A).
If Yes If No
The problem is with WSS.
The problem is with ECU. Switch ignition Off; Detach EHCU connector; Replace the ECU Assembly. (ECU assembly Part # - Refer Table A)
Connect the wiring harness to Sensors & EHCU. Switch on the ignition & check if the error is healed.
Remove EHCU connector (H-3) & sensor connector (FL: H-5; FR: H-6; RR: H-7).
Switch Off the Ignition
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 10 of 62
ABS Trouble shooting
Description –
DTC Error Description
Effect of DTC
1803
1804
WSS Short – Front Left
WSS Short – Front Right
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
1805 WSS Short – Rear
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: WSS output signals out-of-range
• Defective wheel speed sensor • Defective wiring harness to wheel speed
sensor • Defective Microprocessor or Printed
Circuit Board in the ECU. • Electrical Pins bent of ECU or WSS
1803
1804
1805
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 11 of 62
Trouble Shooting –
1803
1804
1805
Change the wiring harness. (Wiring Harness Part # - Refer Table A)
After replacement of the required component, connect the wheel harness to Sensor & EHCU. Switch on the Ignition & confirm if the error is healed.
Check continuity in wiring harness - between sensors’s mating connector to EHCU mating connector (Low to Low & High to High).
If Yes If No
The problem exists either in ECU or WSS.
Change the respective WSS as per the DTC codes. (Front WSS Part # - Refer Table A Rear WSS Part # - Refer Table A)
If Yes If No
The problem is with WSS.
The problem is with ECU. Switch Off ignition; Detach EHCU connector; Replace the ECU Assembly. (ECU assembly Part # - Refer Table A)
Connect the wheel wiring harness to Sensors & EHCU. Switch on the ignition & check if the error is healed.
Remove EHCU connector (H-3) & sensor connector (FL: H-5; FR: H-6; RR: H-7).
Switch Off the Ignition
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 12 of 62
ABS Trouble shooting Description –
DTC Error Description
Effect of DTC
1806
1807
WSS Missing – Front Left
WSS Missing – Front Right
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
1808 WSS Missing – Rear ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: WSS output signals out-of-range
• Wheel speed sensor not mounted
correctly. • Wheel speed sensor to toner-wheel gap
out of tolerance. • Excessive run-out at vehicle level on
toner ring teeth
1806
1807
1808
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 13 of 62
Trouble Shooting –
1806
1807
1808
Check the WSS mounting. Retighten to the specified torque. ( 20 ± 3 Nm ).
If the toner wheel appears to have come out of the disc or there is more run out of the disc. Check Toner wheel visually for any damage.
Switch Off the Ignition
Any damage/ visual defect
Replace the affected Components
Remove the wheel assembly. Check the bearing & races. Reassemble.
Switch on the ignition, clear all errors.
If complaint re-occurs then only replace the affected toner wheel assembly.
Switch on the ignition, clear all errors.
If Yes If No
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 14 of 62
ABS Trouble shooting Description –
DTC Error Description
Effect of DTC
1809
180A
WSS Erratic – Front Left
WSS Erratic – Front Right
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
180B WSS Erratic – Rear ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: WSS output signals out-of-range
• Wheel speed sensor not mounted
correctly. • Missing Tooth or Teeth on the wheel
speed sensor tone – wheel. • Excessive run-out at vehicle level on
toner ring teeth
1809
180A
180B
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 15 of 62
Trouble Shooting –
1809
180A
180B
Check the WSS mounting. Retighten to the specified torque. ( 20 ± 3 Nm ).
I. If the toner wheel appears to have come out of the disc or there is more run out of the disc.
II. Check Toner wheel visually for any
damage.
Switch Off the Ignition
Any damage/ visual defect
Replace the affected Components
Remove the wheel assembly. Check the bearing & races. Reassemble.
Switch on the ignition, clear all errors.
If complaint re-occurs then only replace the affected toner wheel assembly.
Switch on the ignition, clear all errors.
If Yes If No
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 16 of 62
ABS Trouble shooting Description –
DTC Error Description
Effect of DTC
180C
180D
WSS Drop Out – Front Left
WSS Drop Out –Front Right
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
180E WSS Drop Out – Rear ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: WSS output signals out-of-range
• Defective wheel speed sensor • Defective harness to wheel speed sensor • Defective terminals of WSS or wiring
harness • Wheel speed sensor not mounted
correctly.
180C
180D
180E
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 17 of 62
Trouble Shooting –
180C
180D
180E
Replace Wheel speed sensor & Check
Replace the disc & toner wheel assembly in the front and the toner wheel in the rear. (Disc & Toner wheel Part # - Refer Table A Rear Toner wheel assembly Part # - Refer Table A)
Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
If suspect
Replace the WSS wiring harness suitably. (Wiring harness Part # - Refer Table A)
If found OK
Check WSS mounting. Tighten to the specified torque (20 ± 3 Nm).
If found faulty
Check Toner wheel Visually for Damaged/Missing tooth (No. of Teeth=60)
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 18 of 62
ABS Trouble shooting
Description –
DTC Error Description
Effect of DTC
180F
Mismatch Tyre
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: High variation in wheel speed
• Anything that generates consistent differences in apparent wheel rotational speed.
• Significantly different size tyres installed on the vehicle.
• Rear toner wheel come out of the diff case or free to rotate on diff case assembly.
180F MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 19 of 62
Trouble Shooting – To get an indication go to the live data screen in the Diagnostic tool. Drive the vehicle and check the wheel speed (individual) and the see the difference.
Check toner wheel visually for damaged / missing tooth / teeth. (No. of teeth 60)
Replace the disc & toner wheel assembly on the front and toner wheel on the rear. (Disc & toner wheel assembly Part # - Refer Table A Differential Case & Rear Toner wheel Assembly Part # - Refer Table A )
Check if only recommended tyres are installed on the vehicle.
If found faulty If found OK
If No
Replace with the recommended size tyres.
Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
180F MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 20 of 62
ABS Trouble shooting Description –
DTC Error Description Effect of DTC
1810
1811
Solenoid Open–ISO Front Left
Solenoid Open–ISO Front Right
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
1812 Solenoid Open – ISO Rear ABS Lamp : ON;
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
1813
1814
Solenoid Open–Dump Front Left
Solenoid Open–Dump Front Right
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
1815
Solenoid Open – Dump Rear
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
1816
1817
1818
1819
181A
181B
ISO Front Left Solenoid -Driver Shorted
ISO Front Right Solenoid -Driver Shorted
ISO Rear Solenoid -Driver Shorted
Dump valve Front Left Solenoid -Driver Shorted
Dump valve Front Right Solenoid -Driver Shorted
Dump valve Rear Solenoid -Driver Shorted
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
181A
181B
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 21 of 62
Performance Condition Possible Causes
Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: HCU or ECU malfunction.
• Defective Solenoid • Defective Solenoid Driver FET • Defective Microprocessor or Printed
circuit Board in the ECU. • Anything that keeps solenoid
feedback voltage low when the solenoid is not energized.
Trouble Shooting –
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
181A
181B
Wait for 60 seconds.
Switch on the Ignition & check if the error is healed.
If No
Replace The ECU Assembly. (ECU Assembly Part # - Refer Table A)
Connect the wheel harness. Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 22 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
181C
181D
Valve solenoid ISO valve Front Left
Valve solenoid ISO valve Front Right
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
181E
Valve solenoid ISO valve -Rear
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
181F
1820
Valve Solenoid Dump–Front Left-Shorted
Valve Solenoid Dump–Front Right-Shorted
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
1821
Valve Solenoid –Rear Dump-Short
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
181C
181D
181E
181F
1820
1821
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 23 of 62
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: HCU or ECU malfunction.
• Solenoid shorted • Defective Solenoid Driver FET • Defective Microprocessor or
Printed circuit Board in the ECU. • Anything that keeps the solenoid
voltage high when the solenoid is supposed to be energized.
Trouble Shooting –
181C
181D
181E
181F
1820
1821
Wait for 60 seconds.
Switch on the Ignition & check if the error is healed.
If No
Switch Off the Ignition
Replace The ECU Assembly. (ECU Assembly Part # - Refer Table A)
Connect the wheel harness. Switch on the Ignition & check if the error is healed.
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 24 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
1822 Valve Solenoid-ISO Front Left- Over temperature
1823 Valve Solenoid-ISO Front Right- Over temperature
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
1824
Valve Solenoid-ISO Rear- Over temperature
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
1825 Valve Solenoid - Dump Front Left - Over Temperature
1826 Valve Solenoid - Dump Front Right - Over Temperature
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
1827
Valve Solenoid - Dump Rear - Over Temperature
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
1822
1823
1824
1825
1826
1827
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 25 of 62
Performance Condition Possible Causes
Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: HCU malfunction.
• Anything that causes the solenoid
to be active for a long period of time.
Trouble Shooting –
1822
1823
1824
1825
1826
1827
Allow enough time interval for solenoid to get cooled. (Approx. 10 Min.)
Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
If not healed then replace the HCU. (HCU Assembly Part # - Refer Table A)
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 26 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
1828
Power Switch - Open
ABS Lamp : ON; Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: ECU malfunction
• Defective Power Switch. • Defective Microprocessor port
or printed circuit board in the ECU.
1828 MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 27 of 62
Trouble Shooting –
1828
Wait for 60 seconds.
Switch on the Ignition & check if the error is healed.
If No
Replace The ECU Assembly. (ECU Assembly Part # - Refer Table A)
Connect the wheel harness. Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 28 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
1829
Power Switch - Shorted
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: ECU malfunction
• Defective Power Switch. • Defective Microprocessor port
or printed circuit board in the ECU.
1829 MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 29 of 62
Trouble Shooting –
1829
Wait for 60 seconds.
Switch on the Ignition & check if the error is healed.
If No
Replace The ECU Assembly. (ECU Assembly Part # - Refer Table A )
Connect the wheel harness. Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 30 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
182A
ABS Motor - Open
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality. Malfunction: Motor malfunction
• Defective Motor (Open motor winding).
• Defective Motor Driver (Always On ) • Defective printed circuit board
(feedback shorted high) • Anything that keeps motor
feedback voltage high when the motor has been commanded off & should be stationary.
182A MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 31 of 62
Trouble Shooting –
182A
Remove wiring harness.
Check the battery + & ground connections to the ECU mating connector terminals (Pin No. 31 & 45)
If OK If Not OK
Check & Replace Wheel Harness. (Wiring Harness Part #-Refer Table A)
Connect the wiring harness.
Switch on the Ignition & check if the error is healed.
If Not
Switch off the Ignition.
Remove wheel harness & ECU.
Replace HCU assembly. (HCU Assembly Part # - Refer Table A)
Assemble the ECU assembly back on to the new HCU assembly.
Switch on the Ignition & check if the error is healed.
If the error is healed; switch off the ignition & replace the ECU assembly with old ECU.
Switch on the Ignition & check if the error is healed.
Replace the ECU assembly. (ECU assembly Part # - Refer Table A)
Switch Off the Ignition
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 32 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
182B
ABS Motor - Locked
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: Motor malfunction
• Defective Motor (Locked/ seized) • Defective Motor Driver (Always On ) • Bad Motor connections • Defective Motor driver. • Defective Printed Circuit Board (
Feedback Line Open ) • Anything that keeps motor
feedback voltage low when it is expected to be driven high by back – EMF across the rotor winding of the coasting motor.
182B MAN-00030
922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 33 of 62
Trouble Shooting –
182B
Remove wiring harness.
Check the battery + ve & ground connections to the ECU mating connector terminals (Pin No. 31 & 45)
If OK If Not OK
Check & Replace Wiring Harness. (Wiring Harness Part #- Refer Table A)
Connect the wiring harness.
Switch on the Ignition & check if the error is healed.
If Not
Switch off the Ignition.
Remove wheel harness & ECU.
Replace HCU assembly. (HCU Assembly Part # - Refer Table A)
Assemble the ECU assembly back on to the new HCU assembly.
Switch on the Ignition & check if the error is healed.
If the error is healed; switch off the ignition & replace the ECU assembly with old ECU.
Switch on the Ignition & check if the error is healed.
Replace the ECU assembly. (ECU assembly Part # - Refer Table A)
Switch Off the Ignition
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 34 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
182C
ABS Motor – Open Fuse
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality Malfunction: Motor malfunction
• Blown or Removed Motor Supply
Fuse • Faulty Wheel Harness
182C MAN-00030
922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 35 of 62
Trouble Shooting –
Check Motor Supply Fuse
If Not OK
Replace Fuse
Switch on Ignition & check if error is healed.
If Not
Switch off the Ignition.
Remove the wheel Harness & check the battery + & ground connections to the ECU mating connector terminals (Pin No. 31 & 45)
If found faulty
Set right the connections or replace the ABS Chassis Wiring. (ABS Chassis Wiring Harness Part # - Refer Table A)
Switch on Ignition & check if error is healed.
Switch Off the Ignition
182C MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 36 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
182D
182E
182F
1830
1831
Microprocessor ROM Failure
Microprocessor RAM Failure
Microprocessor Stack Failure
Microprocessor Schedule Overrun Failure
Microprocessor External watchdog Failure
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
Performance Condition Possible Causes Proper Performance: Effective ABS / DRP operation. (No wheel lock) Malfunction: Defective microprocessor
• Defective Microprocessor
182D
182E
182F
1830
1831
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 37 of 62
Trouble Shooting –
182D
182E
182F
1830
1831
Wait for 60 seconds.
Switch on the Ignition & check if the error is healed.
If No
Replace The ECU Assembly. (ECU Assembly Part # - Refer Table A)
Connect the wiring harness. Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 38 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
1832
Base brake fluid sensor – open
Base brake failure
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Partially active
DRP Status : Partially active
Performance Condition Possible Causes Proper Performance: Enough fluid availability for effective braking & ABS / DRP functionality. Malfunction: Brake fluid unavailable
• Parking Brake Failure • Low brake fluid level sensor
reading • Disconnected sensor • Faulty wiring harness • Faulty sensor
1832 MAN-00030
922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 39 of 62
Trouble Shooting –
1832
Check if Hand brake is ON
If Yes
Release the Hand Brake. Check if the Brake Fluid Level is above the Minimum Level marked in the reservoir.
If Yes
If No
If No
Top up the Brake Fluid.
Check the Fluid Level Switch.
If found faulty
Replace the switch. (FLWI Switch Part # - Refer Table A)
Connect the wiring harness. Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
Find the reason for leak- correct if required.
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 40 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
1833
Ignition Voltage Supply low ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Fully Active
DRP Status : Fully Active
Performance Condition Possible Causes Proper Performance: Availability of sufficient ignition voltage for Effective ABS / DRP operation. Malfunction: This fault is set if the Ignition Voltage Supply is less than 10V for 100 msec.
• Ignition Voltage supply is
providing low Ignition Voltage levels.
• Defective cables • Defective Printed Circuit Board in
ECU.
1833
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 41 of 62
Trouble Shooting –
1833
Check Battery Voltage.
If required Charge the Battery.
Switch on the Ignition & check if the error is healed.
If Not
Remove wiring Harness & check for any Short Circuit in the Harness.
If found Faulty.
Replace the wiring Harness. (Wiring Harness Part # - Refer Table A)
Switch on the Ignition & check if the error is healed.
If Not
Replace the ECU Assembly. (ECU Assembly Part # - Refer Table A)
Connect the wiring harness. Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 42 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
1834
Ignition Voltage Supply High ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Fully Active
DRP Status : Fully Active
Proper Performance : Availability of correct ignition voltage for Effective ABS / DRP operation
Performance Condition Possible Causes Proper Performance: Availability of sufficient ignition voltage for Effective ABS / DRP operation. Malfunction: This fault is set if the Ignition Voltage is greater than 16V for 100 msec.
• Ignition Voltage supply is providing High Ignition Voltage levels.
• Defective Printed Circuit Board in ECU.
1834 MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 43 of 62
Trouble Shooting –
1834
Remove wiring Harness & check for any Short Circuit in the Harness.
If found Faulty.
Replace the wiring Harness. ( Wiring Harness Part # Refer Table A)
Switch on the Ignition & check if the error is healed.
If Not
Replace the ECU Assembly. (ECU Assembly Part # - Refer Table A)
Connect the wiring harness. Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 44 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
1835
Ignition Voltage Supply – Excessive High
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status: Inactive.
Performance Condition Possible Causes Proper Performance: Availability of sufficient ignition voltage for Effective ABS / DRP operation. Malfunction: This fault is set if the Ignition Voltage is greater than 19.5V for 15 msec.
• Ignition Voltage supply is providing excessively High Ignition Voltage levels.
• Defective Printed Circuit Board in ECU.
1835 MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 45 of 62
Trouble Shooting –
1835
Remove wheel Harness & check for any Short Circuit in the Harness.
If found Faulty.
Replace the wiring Harness. (Wiring Harness Part # - Refer Table A)
Switch on the Ignition & check if the error is healed.
If Not
Replace the ECU Assembly. (ECU Assembly Part # - Refer Table A)
Connect the wiring harness. Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 46 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
1836
1837
1838
1839
Microprocessor Unimplemented Interrupt.
Microprocessor Unexpected Exception.
Microprocessor Solenoid Timeout Failure.
Microprocessor HET Periodic Interrupt Failure.
183A Microprocessor SPI Failure.
ABS Lamp : ON
Parking Brake Lamp : ON
ABS Status : Inactive
DRP Status : Inactive
183B
Microprocessor SPI Queue Overflow
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Fully Active
DRP Status : Fully Active
1836
1837
1838
1839
183A
183B
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 47 of 62
Performance Condition Possible Causes Proper Performance: Effective ABS / DRP operation. (No wheel lock) Malfunction: Defective microprocessor
• Defective Microprocessor
Trouble Shooting –
1836
1837
1838
1839
183A
183B
Wait for 60 seconds.
Switch on the Ignition & check if the error is healed.
If No
Replace The ECU Assembly. (ECU Assembly Part # - Refer Table A)
Connect the wiring harness. Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 48 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
183C
Brake Pedal Switch Failed – Never Active
183D Brake Pedal Switch Failed–Always Active
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Fully Active
DRP Status : Fully Active
Performance Condition Possible Causes Proper Performance: Brake switch produces output based on Pedal input Malfunction: Defective signal
• Defective Brake Switch • Defective wiring Harness • Defective Printed Circuit Board
or Microprocessor in ECU.
183C
183D
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 49 of 62
Trouble Shooting –
Check Brake Switch
If found Faulty
Replace Brake Switch. (Brake Switch Part # - Refer Table A)
Switch on the Ignition & check if the error is healed.
If Not
Remove ECU mating connector & check Brake Switch input.
If found Faulty
Replace wiring harness. (Wiring Harness Part # - Refer Table A)
Switch on the Ignition & check if the error is healed.
If Not
Replace ECU Assembly. (ECU Assembly Part # - Refer Table A)
Connect the wiring Harness Switch on the Ignition & check if the error is healed.
Switch Off the Ignition
183C
183D
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 50 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
183E
Tooth count Failure (Out of Range) ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Fully Active
DRP Status : Fully Active
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality ( No wheel lock) Malfunction: Defective signal
• ECU NVRAM corruption • Incorrect Tooth Count • Tooth Count not programmed.
183E MAN-00030
922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 51 of 62
Trouble Shooting –
183E
Wait for 60 seconds.
Switch on the Ignition & check if the error is healed.
If No
Use the Diagnostic tool & Re-flash the ABS EHCU using VIN no. of vehicle
Connect the wiring harness. Switch on the Ignition & check if the error is healed.
Wait for 60 seconds.
Switch on the Ignition & check if the error is healed.
If Not
Switch Off the Ignition.
Replace the ECU Assembly. (ECU Assembly Part # - Refer Table A)
Switch off the Ignition.
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 52 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
183F
Tyre Size Failure ( Mismatch/ out of range)
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Fully Active
DRP Status : Fully Active
Performance Condition Possible Causes Proper Performance: Under normal condition the Wheel speed signal are proportional and can be used for the ABS & DRP functionality ( No wheel lock) Malfunction: Defective signal
• NVRAM corruption • Incorrect Tyre Size • Tyre Size not programmed.
183F MAN-00030
922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 53 of 62
Trouble Shooting –
183F
Wait for 60 seconds.
Switch on the Ignition & check if the error is healed.
If Not
Use the Diagnostic tool & enter Tyre Size (M1 / N1)
Switch off the Ignition.
Wait for 60 seconds.
Switch on the Ignition & check if the error is healed.
Switch off the Ignition.
If Not
Connect the wiring harness. Switch on the Ignition & check if the error is healed.
Replace the ECU Assembly. ( ECU Assembly Part # - Refer Table A)
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 54 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
1840
Emission Rollers Mode Active ABS Lamp : FLASH
Parking Brake Lamp : FLASH
ABS Status : Inactive
DRP Status : Inactive
Performance Condition Possible Causes Proper Performance: This Message appears when EOL (End of Line) test is running. Malfunction:
• Emission Rollers Test is Active • Incorrect communication bus
message
1840 MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 55 of 62
Trouble Shooting – This Message appears when EOL test is running.
1840 MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 56 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
1841
Invalid Drive-train configuration
ABS Lamp : ON
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
Performance Condition Possible Causes Proper Performance: Proper input to ECU on Drive-train status / Drive mode configuration ensures effective ABS / DRP functionality ( No wheel lock) Malfunction: Defective signal
• NVRAM corruption • This fault will be set if the drive-
train configuration value stored in NVRAM is not valid, or if the Drive-train configuration in NVRAM is set to 2WD & the ECU receives a transfer case mode message via comms.
1841 MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 57 of 62
Trouble Shooting –
1841
Check whether correct flashing is done in ECU is installed in the vehicle. (2WD ECU for 2WD vehicle & 4WD ECU for 4WD vehicle )
If it is a 2 WD vehicle; check if DMD unit is assembled in the vehicle.
If Yes
Remove it.
If No
Connect the wiring harness. Switch on the Ignition & check if the error is healed.
Replace the ECU Assembly. ( ECU Assembly Part # - Refer Table A)
Switch off the Ignition.
MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 58 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
1842
Communication Missing Transfer Case Status
ABS Lamp : ON;
Parking Brake Lamp : OFF
ABS Status : Partially Active
DRP Status : Fully Active
Performance Condition Possible Causes Proper Performance: Proper input to ECU on Drive-train status / Drive mode configuration ensures effective ABS / DRP functionality ( No wheel lock) Malfunction: Defective signal
• NVRAM corruption • This fault will be set if the drive-
train configuration value stored in NVRAM is not valid, or if the Drive-train configuration in NVRAM is set to 2WD & the ECU receives a transfer case mode message via comms
1842 MAN-00030
922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 59 of 62
Performance Condition Possible Causes
Malfunction; out-of-range This fault will be set if the drive train configuration in NVRAM is set to 4WD & ECU does not receive a Transfer Case Mode message via comms within five seconds of Ignition ON.
• Communication Bus failure • Drive Mode Data Unit failure
Trouble Shooting –
Check whether correct flashing is done in ABS EHCU
If Yes If No
Check if DMD connection is OK.
Connect the wiring harness. Switch on the Ignition & check if the error is healed.
Try Re-flashing, if it does not work, Replace the ECU. (ECU Assembly Part # - Refer Table
Switch Off Ignition & Switch ON again. & see if error is healed.
Switch off the Ignition.
1842 MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 60 of 62
ABS Trouble shooting
Description –
DTC Error Description Effect of DTC
1843
Communication General K-Line Fault
ABS Lamp : OFF
Parking Brake Lamp : OFF
ABS Status : Fully Active
DRP Status : Fully Active
Performance Condition Possible Causes Proper Performance: Effective communication process in the K-Line bus ensures effective ABS & DRP functionality ( No wheel lock) Malfunction:
• This fault is set if the K – Line bus
experiences errors in processing of communications.
• Bad K – Line cable. • Bad K – Line peripheral on the
Microprocessor in the ECU
1843 MAN-00030922BRKR011107EN-DM
Automotive Sector
All copyrights reserved by
Mahindra & Mahindra Ltd Scorpio Diagnostic Guide - ABS Confidential- For Internal Circulation Only Ver 1 Nov 07 Page 61 of 62
Trouble Shooting –
1843
If found Faulty
Replace the wiring Harness. (Wiring Harness Part # - Refer Table A)
Replace the ECU Assembly. (ECU Assembly Part # - Refer Table A)
Connect the wiring harness. Switch on the Ignition & check if the error is healed.
Check wiring harness.
Switch off the Ignition.
If found OK
MAN-00030922BRKR011107EN-DM