section 55 -- electrics chapter 10 -- component testing · 2017-07-26 · warning lamp associated...

1SECTION 55 -- ELECTRICAL SYSTEM -- CHAPTER 10

604.55.041.01 10--1998

SECTION 55 -- ELECTRICS

CHAPTER 10 -- COMPONENT TESTING

CONTENTS

Section Description Page

55 000 Component Locations 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1. Thermostart Device 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2. Coolant Temperature Sender 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3. Engine Oil Pressure Switch 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4. Engine Oil Pressure Sender 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5. Alternator 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6. Air Filter Restriction Switch 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7. Brake Fluid Level Switch 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8. Fuel Injection Pump 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9. Handbrake Switch 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10. Fuel Gauge Sender 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11. Low Transmission Oil Pressure Switch 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12. Oil Filter Restriction Switch 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13. 40! C Switch 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14. Low Charge Pressure Switch 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15. Radar 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16. Load Sensing Pins 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17. Lift Lever Potentiometer 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18. Lift Arm Cross Shaft Potentiometer 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19. Electronic Draft Control Solenoids 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20. Electronic Draft Control Panel 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Panel Connector Resistance Table 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21. PTO Switch 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22. Transmission Speed Sensor 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23. Brake Pedal Switches 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24. Forward/Reverse Dump Switch 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25. 16x16 Transmission Gear Display 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26. Clutch Pedal Potentiometer 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27. Clutch Pedal Disconnect Switch 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28. PWM Solenoid Valves 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29. Upshift/Downshift Buttons 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30. Differential Lock Light Switch 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31. Differential Lock, PTO, Creep, 4WD & Dump Solenoids 42. . . . . . . . . . . . . . . . . . . . .32. Transmission Oil Temperature Sensor 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33. Transmission Status Switches 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34. Multifunction Switch Lights 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35. Multifunction Switch Wiper/Wash Switch 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 SECTION 55 -- ELECTRICAL SYSTEM -- CHAPTER 10

604.55.041.01 10--1998

1. Thermostart Device 2. Coolant temperature

4. Engine Oil Pressure Sender 3. Engine Oil Pressure Switch


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5. Alternator 6. Air Filter Restriction Switch

9. Handbrake Switch 8. Fuel Injection Pump

7. Brake Fluid Switch


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10. Fuel Sender 11. Low Transmission Oil Pressure Switch

13. 40!C Switch 12. Oil Filter Restriction Switch


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14. Low Charge Pressure Switch 15. Radar

17. Lift Lever Potentiometer 16. Load Sensing Pins


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18. Lift Arm Potentiometer 19. EDC Solenoids

21. PTO Switch 20. EDC Panel


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22. Transmission Speed Sensor 23. Brake Pedal Switches

25. 16x16 Gear Display 24. Forward/Reverse Shuttle


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26. Clutch Pedal Potentiometer 27. Clutch Disconnect Switch

29. Upshift/Downshift Buttons 28. PWM Solenoid Valves


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30. Differential Lock Micro Switch 31. Differential Lock, PTO, Creep,4WD & Dump Solenoids

33. Transmission Status Switches32. Transmission OilTemperature Sensor


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34. Multifunction Switch Lights 35. Multifunction SwitchWiper/Wash Switch

1

2

3

45

7

6

TAG010


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! ! ! !

1. THERMOSTART DEVICE

The thermostart which is efficient at ambienttemperatures of --18! C, comprises a heatingelement fitted in the intake manifold. When thethermostart is switched on it ignites fuel in themanifold, thus heating the air before it enters thecombustion chamber.

The thermostart is activated when the key is turnedanti-clockwise. It is actioned for 15 seconds.

TEST PROCEDURE

Voltage

Turn the ignition key to the thermostart position. 12Vbetween the BROWN / RED wire and EARTH (for 15seconds only).

OPERATIONAL LIGHT


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! ! ! !

2. COOLANT TEMPERATURE SENDER

The resistance of the temperature sender changesproportionally to the temperature of the coolant,which makes it possible to send a modulated voltagesignal to the instrument cluster to operate the bargraph / temperature gauge.

TEST PROCEDURE

Voltage

5V between the GREEN / BLUE wire and EARTH.

Resistance

4500--6000 " Engine coldLess than 650 " Engine hot

WARNING LAMP

ASSOCIATED ERROR CODES

EIC 7 Sender Short CircuitEIC 12 Sender Open Circuit


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3. ENGINE OIL PRESSURE SWITCH

If the engine oil pressure drops below 0.68 bar, thewarning lamp is illuminated.

As the switch is a normally open type, the warninglamp is illuminated when the ignition is switched onand the engine is not running.

TEST PROCEDURE

Voltage

12V between the WHITE / BROWN wire andEARTH.

WARNING LAMPS


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EIC EIC

4. ENGINE OIL PRESSURE SENDER

The resistance of the oil pressure sender variesproportionally with the engine oil pressure, whichmakes it possible to send a modulated voltage signalto the instrument cluster to operate the engine oilpressure bar graph (EIC only).

TEST PROCEDURE

Voltage

5V between the GREEN / PINK wire and EARTH.

Resistance

-- Between pins A and B 26 k "-- Between pins B and C 34 k "-- Between pins A and C 26 k "

Sensor Calibration

DisplaySegment

SensorVolts

DisplaySegment

SensorVolts

Alarm function pressure will vary withengine rpm

1 less than 1.47 7 2.93 -- 3.22 Sensor RPM Alarm2 1.47 -- 1.76 8 3.22 -- 3.51

3 1.76 -- 2.06 9 3.51 -- 3.81 Volts Bar Less than 500 OFF

4 2.06 -- 2.35 10 3.81 -- 4.10 1.47 0.6 500 -- 1500 ON

5 2.35 -- 2.64 11 4.10 -- 4.39 1.76 1.1 1500 -- 2000 ON

6 2.64 -- 2.93 12 4.39 -- 4.83 2.06 1.7 2000 -- 3000 ON


EIC 1 Sender Short CircuitEIC 2 Sender Open Circuit


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5. ALTERNATOR

This sends a square wave signal, the frequency ofwhich varies between 142.5 and 855 Hz (480--3060rpm) to the microprocessor and to the instrumentpanel.

TEST PROCEDURE

With the engine running, the warning light should goout. If not, disconnect the wire connected to theterminal D+. When D+ is not connected and thewarning light goes out, there is a fault with thealternator. If it does not go out, then check the wiringloom for a short to earth between D+ cable and thewarning light.

READING THE FREQUENCY (AT TERMINAL W,WHITE / SLATE WIRE)

ENGINE SPEED(RPM)

FREQUENCY(Hz)

1000 300

1500 430

2000 560

2300 660


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6. AIR FILTER RESTRICTION SWITCH

The warning lamp will illuminate when the switch hasbeen closed for 5 seconds.

When the vacuum pressure on the engine side of theair intake filter exceeds 46.7 mm Hg, the warninglamp is illuminated. This is a normally open switch.

TEST PROCEDURE

Voltage

12V between the BLACK / GREY and BLACKwires.

Checking the Switch

Removing the rubber plug and pressing against thebottom of the switch with a suitable probe, shouldcause the switch to close.

WARNING LAMPS


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! ! !

7. BRAKE FLUID LEVEL SWITCH

When the fluid level drops below the minimum level,a warning lamp is illuminated intermittently. This is anormally open switch.

TEST PROCEDURE

Voltage

Handbrake Off. 12V between the RED / PINK andthe BLACK wires.

Resistance

If the level is correct, resistance is infinite.

If the level is too low, there is continuity.

WARNING LAMPS


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8. FUEL INJECTION PUMP

The emissionised Fuel Injection Pump (FIP) has anelectric lift pump, a temperature related switch, awaxmotor and a shut-off solenoid.

TEST PROCEDURE

Fuel Pump

Fuel pump resistance 1.6" across the two wires,BLACK and PURPLE / YELLOW.

12 V PURPLE / YELLOW to EARTH.

Temperature Switch

The temperature switch is normally open when coldand closed when hot. Supply voltage of 12V at thePURPLE / YELLOW.

Wax Motor

The wax motor has a typical resistance of 6" whencold and 10" when hot.Voltage of 12V when engine is hot and thetemperature switch closed.

Shut-off Solenoid

Receives 12 volts with ignition onResistance 9"


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9. HAND BRAKE SWITCH

When the handbrake has been applied, the switchwill be closed and the warning lamp is illuminated.

An alarm will be triggered if wheel movement of morethan 0.8 km/h is detected when the handbrake hasbeen applied and the ignition is switched on.

This alarm is also activated for 2 minutes when theignition has been switched off and the handbrake hasnot been applied.

TEST PROCEDURE

Voltage

12V at RED / PINK to EARTH.

NOTE: The orange and white wire (or blue on theside of the switch) is only connected where the‘‘Italian’’ trailer braking system is fitted.

OPERATIONAL LIGHT


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10. FUEL GAUGE SENDER

The signal from the fuel sender potentiometerdetermines the fuel level displayed on the instrumentcluster gauge.

TEST PROCEDURE

Voltage

5V at Green/Black wire to earth.

Resistance


EIC 3 Short circuitEIC 4 Open circuit

TRANSMITTERRESISTANCE

GAUGEINDICATION

31 5" FULL25020" EMPTY


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! !!

11. LOW TRANSMISSION OILPRESSURE SWITCH

If the transmission oil pressure drops below 11 bars,the warning lamp will be illuminated. This is anormally closed pressure switch.

When there is no pressure in the system, contact ismade between the two terminals of the switch.

TEST PROCEDURE

Voltage

12V between the YELLOW / ORANGE and BLACKwires.

WARNING LAMPS


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12. OIL FILTER RESTRICTION SWITCH

When the temperature is greater than 40! C andwhen the suction pressure on the pump side of thefilter exceeds 406 mm Hg (5812 mm H2O), thevacuum switch illuminates the warning lamp. This isa normally open switch.

TEST PROCEDURE

Voltage

When the 40! C temperature switch is closed circuit,i.e. greater than 40! C, or shorted out.

12V between the BLACK / BROWN wires andEARTH.

WARNING LAMPS


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13. 40!C SWITCH (OIL TEMPERATURE)

When the transmission oil temperature exceeds40! C, this switch (1) enables the oil filter restrictionswitch. This is a normally open thermocontact.

TEST PROCEDURE

To check the switch, submerge it in oil. If thetemperature of the oil is in excess of 40! C, theswitchshould close and there should be continuity betweenthe two terminals.

WARNING LAMPS


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!

14. LOW CHARGE PRESSURE SWITCH

If the charge pressure drops below 0.8 BAR, it willcause the warning lamp to flash. The warning lampwill flash when the switch has been closed for 5SECONDS. This is a normally closed switch.

TEST PROCEDURE

Voltage

The voltage measured between RED / BROWN /BLACK wires and EARTH should be 12V.

Pressure Switch

Contact must be established between theconnection socket (earth) and the pressure switch.

WARNING LAMPS

R/N/B


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EIC EIC

15. RADAR

This detects the forward speed of the tractor andsends a signal to the instrument cluster to display thetractors speed, the percentage of wheel slip, thedistance and the cumulative total area worked.

TEST PROCEDURE

Voltage

Harness side1 : Earth2 : Frequency Signal3 : Supply Voltage4 : Radar Diagnostics

Relationship Between Frequency and Speed

Values must be read between the green wire andearth.


EDC 2 Poor or no signal from tractor performancemonitor radar

EDC 3 Transmission output speed sensor or tractorperformance monitor radar circuitintermittent failure.

FREQUENCYHz

SPEED

0 0 0550 15 9.3

1100 30 18.7

km/h m/h


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EDC EDC

16. LOAD SENSING PINS

-- 50 kN pins

-- The fixing flange ensures correct pin orientation

TEST PROCEDURE

Resistance

1 to 2 177 k"1 to 3 8.9 k"2 to 3 177 k"

Voltage

8V at pin 1, PINK wire to EARTH.


EDC 14 Right hand load sensing pin failure/circuitopen or shorted to chassis.

EDC 15 Right hand load sensing pin failure/circuitshorted to chassis.

EDC 16 Left hand load sensing pin failure/circuitopen or shorted to chassis.

EDC 17 Left hand load sensing pin failure/circuitshorted to chassis.

EDC 18 Both load sensing pins disconnected oropen load sensing pin circuit.

EDC 19 Load sensing pin supply voltage shorted toground.

EDC 20 Load sensing pin supply voltage shorted tobattery.


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EDC EDC

17. LIFT LEVER POTENTIOMETER

-- The resistance of the potentiometer changes asthe lever is moved.

-- Its signal is continuously monitored by themicroprocessor.

TEST PROCEDURE

Voltage

B : EarthK/Y : 5.3V (Ignition ON)LN/B : Zero

Resistance

WireLever

ForwardLever

Rearward

Black to Green 0.5 k" 3.6 k"

Black to Orange 4.0 k" 4.0 k"

Orange to Green 3.6 k" 0.3 k"


EDC 25 Lift control lever potentiometerdisconnected or circuit open or shorted tochassis.

EDC 26 Lift control lever potentiometer failure orcircuit shorted to supply voltage.

K/YB

LN/B


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EDC EDC

18. LIFT ARM (CROSS SHAFT)POTENTIOMETER

-- Mounted on the lift arm

-- Informs the microprocessor of the lift armposition.

TEST PROCEDURE

Resistance

WireArms

LoweredArms

Raised


Green to Orange 3.28 k" 0.49 k"

Orange to Black 3.5 k" 3.5 k"

Voltage

PINK / YELLOW wire to earth 5V.


EDC 24 Perform hydraulic lift auto calibration.

EDC 27 Lift arm position sensing potentiometerfailure, disconnected, open circuit or circuitshorted to chassis.

EDC 28 Lift arm position sensing potentiometerfailure, or circuit shorted to supply voltage.

K/NLN/G

K/Y


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EDC EDC

19. ELECTRONIC DRAFT CONTROL(EDC) SOLENOIDS

TEST PROCEDURE

Resistance

The resistance of each of the solenoids should bebetween 6 and 8 ".

Frequency

The signal frequency should be 83 Hz. This is difficultto measure with conventional test equipment.

Voltage/Intensity

The average voltage, amperage and cyclic ratiochange in relation to the control instructions.


EDC 63 EDC hydraulic control valve lowersolenoid/circuit failed.

EDC 64 EDC hydraulic control valve raisesolenoid/circuit failed.

EDC 65 EDC hydraulic control valve lowersolenoid/circuit failed.

EDC 66 EDC hydraulic control valve raisesolenoid/circuit failed.

EDC 67 EDC hydraulic control valve supply voltagetoo low.

K/G/BK/R


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EDC EDC

20. ELECTRONIC DRAFT CONTROLPANEL

Potentiometer Connector (C120)

Voltage Check

5V between LIGHT BROWN and EARTH12V between RED/LIGHT GREEN/BLACK andEARTH

Slip Connection (C121)

No voltage is present from loom.

Resistance

Panel connector -- see table for typical approximatevalues.

Panel Light Connector (C122)

Voltage when EDC solenoids function.

1:TQ/R4:TQ/G


604.55.041.01 10--1998


EDC 2 Poor or no signal from tractor performancemonitor radar.

EDC 6 Slip control potentiometer failure, opencircuit or shorted to chassis.

EDC 7 Slip control potentiometer failure or circuitshorted to supply voltage.

EDC 10 Height limit control potentiometer/circuit --open circuit or shorted to chassis.

EDC 11 Height limit control potentiometer/circuitshorted to supply voltage.

EDC 12 Drop rate control potentiometer/circuit --open circuit or shorted to chassis.

EDC 13 Drop rate control potentiometer/circuitshorted to supply voltage.

EDC 21 Position/draft control sensitivity controlpotentiometer/circuit -- open circuit orshorted to chassis.

EDC 22 Position/draft control sensitivity controlpotentiometer/circuit shorted to supplyvoltage.

EDC 30 Circuit failure to EDC control panel.

EDC Panel Potentiometer and Printed Circuit Board Check, With and Less SlipEDC Panel

Connecting,Pin No.

EDC PanelConnection,

Pin No.

Potentiometer Typical Resistance "Potentiometer Setting

Anti-clockwise -- ClockwiseC120, 1 C121, 1 Slip (1) 33310 9510C120, 1 C120, 2 Drop Rate (3) 33310 9510 W/Slip, , p ( )

41810 9510 L/SlipC120, 3 Draft Position 33310 9510 W/Slip,

Mix (2) 41810 9510 L/SlipC120, 5 Height (4) 33310 9510 W/Slip, g ( )

50515 18010 L/SlipC120, 1 C120, 4 -- 341100 W/Slip, ,

455100 L/SlipC120, 5 C120, 8 Read Manual Light 135C121, 3 C120, 5 Slip Light 145,

C120, 8 Slip and Read Manual Light 275C122, 1 C122, 2 Up light 135C122, 3 C122, 4 Down Light 135


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21. PTO SWITCH

The PTO switching system incorporates a safetystart function which takes a signal from the alternatorwhen the engine is running.

Voltage

Terminal Ignition On On PTORunning

1: G 0 0

2: O/G 0 12V

3: G 12V 12V

Switch Continuity

PTO Switch Off No Continuity

Central buttondepressed momentarily

1 to 3

PTO On 2 to 3

Operation Light

1000rpm.Overspeed

3:R2:G1:B


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Processor Processor

22. TRANSMISSION SPEED SENSOR

This sensor measures the output speed of thetransmission.

If the tractor is fitted with a radar, the signal from thetransmission speed sensor is used for the calculationof the percentage wheel slip.

TEST PROCEDURE

Resistance

There should be a resistance of 2.5 k" across thesensor wires.


EIC 5 Short CircuitEIC 6 Open CircuitE 49 Wheel speed sensor open/short circuitEDC 49 Wheel speed sensor open/short circuitEDC 4 Transmission output speed sensor circuit

intermittent failureEDC 5 Transmission output speed sensor shorted

to chassis.


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23. BRAKE PEDAL SWITCHES

When either brake pedal is applied, the relevantswitch closes, causing the appropriate brake light toilluminate. These switches, when closed, also senda signal to the processor for the operation of the fourwheel drive and differential lock. This is a normallyopen switch.

TEST PROCEDURE

Voltage

12V between both GREEN wires and EARTH.

Pedal up 1 and 4 have continuityPedal down 2 and 3 have continuity


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! !

24. FORWARD/REVERSE DUMPSWITCH

This is a sprung loaded to normally open switch,when pressed and held it becomes closed circuit.

TEST PROCEDURE

Voltage

RED/LIGHT GREEN/BLACK wire 12V to EARTH.

Switch Test

Continuity between RED and GREEN when switchdepressed.

ASSOCIATED ERROR CODE

Transmission HClutchless shuttle operation attempted at toohigh a speed and in too high a gear

LN/N/B


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!

25. 16x16 TRANSMISSION GEARDISPLAY

A set of lights numbered 1 to 8 indicate which gearis selected.

TEST PROCEDURE

Voltage

12V at wires BLUE/YELLOW/BLACK and also atRED/LIGHT GREEN/BLACK.

S/O/B


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! !

26. CLUTCH PEDAL POTENTIOMETER

Informs the processor the relative position of theclutch/inching pedal.

Resistance

TypicalResistancebetween wires

Pedal Up Pedal Down

Orange to Green 0.3 k" 2.5 k"


Orange to Black 3.8 k" 3.8 k"

Voltage

5V LIGHT BROWN wire to EARTH.


E12 Clutch pedal potentiometer signal too high

E11 Clutch pedal potentiometer signal too low

Y/R/B

B

LN


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27. CLUTCH PEDAL DISCONNECTSWITCH

TEST PROCEDURE

Switch

There should be continuity between the two centralpins (when the pedal is up).

Pedal down no continuity on central pins.

Voltage

12V BLUE/RED/BLACK to EARTH.


E37 Clutch disconnect switch open circuit

E47 Clutch disconnect switch misadjusted high

E48 Clutch disconnect switch short circuitmisadjusted, always closed.


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! !

28. PWM SOLENOID VALVES

There are two PWM units fitted to a 24x24transmission and four fitted to a 16x16 transmission.

TEST PROCEDURE

Resistance

The resistance of the solenoid coil, measured at theterminals, should be between 8 and 11 ".

Frequency

The supply signal has a high frequency which isdifficult to measure with conventional equipment.

Voltage

Average voltage 8.5V.


16x16

E39 C4 clutch solenoid open circuitE38 C4 clutch solenoid short circuitE41 C3 clutch solenoid open circuitE40 C3 clutch solenoid short circuitE43 C2 clutch solenoid open circuitE42 C2 clutch solenoid short circuitE45 C1 clutch solenoid open circuitE44 C1 clutch solenoid short circuitE24 All clutches not calibrated

24x24

E39 C2 (High) clutch solenoid open circuitE38 C2 (High) clutch solenoid short circuitE41 C1 (Low) clutch solenoid open circuitE40 C1 (Low) clutch solenoid short circuitE24 All clutches not calibrated


604.55.041.01 10--1998

8x2 12x12 24x24 16x16

! !

29. UPSHIFT/DOWNSHIFT BUTTONS

These are sprung loaded -- normally open switches

TEST PROCEDURE

Voltage

Both R/LG/B to EARTH 12V.

Switch Test

1 Green to 4 Red continuity -- when pressing downshift2 Black to 3 Red continuity -- when pressing upshift


E13 Up and down switches both on


604.55.041.01 10--1998

8x2 12x12 24x24 16x16

! !!

30. DIFFERENTIAL LOCK LIGHTSWITCH

When the rear differential lock is hydraulicallyengaged, a micro switch is actuated illuminating awarning light.

The front differential lock is actuated from the samehydraulic supply.

TEST PROCEDURE

Voltage

12V at YELLOW / BLACK wire to EARTH.

Switch Open Circuit when differential lockdisengaged.

WARNING LIGHT


To be determined.


604.55.041.01 10--1998

8x2 12x12 24x24 16x16

! ! ! !

31. DIFFERENTIAL LOCK, PTO, 4WD,CREEP AND DUMP SOLENOIDS

Resistance 7--11 ".

TEST PROCEDURE

Differential Lock

When the differential lock is engaged, the voltage atthe solenoid terminals should be 12V, and when it isnot engaged, it should be 0V.

Power Take Off

When the PTO is engaged, the voltage at thesolenoid terminals should be 12V and when it is notengaged, it should be 0V.

Creep

When creep is engaged, voltage at solenoidterminals should be 12V and when not engaged 0V.

Dump

When energised by 12V, low pressure oil is directedto the PWM valves.

Four Wheel Drive

When the FOUR WHEEL DRIVE is engaged, thevoltage at the solenoid terminals should be 0V, andwhen it is not engaged, it should be 12V.

ASSOCIATED ERROR CODES/WARNING LAMPS

16x16

C Wheel speed too high for creeper gearHC Range shift too high with creeper engagedE16 Creeper solenoid open/short circuit or attempt

was made to engage creeper after priorcreeper error

24x24

E36 12x12 dump solenoid open circuitE35 12x12 dump solenoid closed circuit


604.55.041.01 10--1998

8x2 12x12 24x24 16x16

! !

32. TRANSMISSION OILTEMPERATURE SENSOR

Situated in the transmission control valve packs forboth 24x24 and 16x16 transmissions.

TEST PROCEDURE

Voltage

5V BLACK/GREEN to EARTH.R/U


604.55.041.01 10--1998

Resistance

Temp ! C 120 100 80 60 40 20 0 --20

Resistance " 45 77 105 175 310 592 1240 2900

(Tolerance 10%)


E51 Transmission temperature sensor open circuitE52 Transmission temperature sensor short circuit


604.55.041.01 10--1998

8x2 12x12 24x24 16x16

! ! ! !

33. TRANSMISSION STATUSSWITCHES

Status switches provide signals to the processor orignition circuit on which synchronisers are selected.

TEST PROCEDURE

Test

When status switches are open circuit no continuitywill be observed. When closed circuit continuity isobserved. All status switches function on 12 volts.

Transmission Switch Lever Position Switch Status

16x16 Forward/Reverse NeutralForward or Reverse

ClosedOpen

1--4 Neutral1--4

OpenClosed

5--8 Neutral5--8

OpenClosed

Hi--Lo NeutralHi or Lo

OpenClosed


ClosedOpen

Hi--Med NeutralHi or Med

OpenClosed

1--2 Neutral1st or 2nd

OpenClosed

3--4 Neutral3rd or 4th

OpenClosed


ClosedOpen

8x2 Hi--Lo NeutralHi or Lo

ClosedOpen


604.55.041.01 10--1998

8x2 12x12 24x24 16x16

! ! ! !

34. MULTIFUNCTION SWITCHLIGHTS/INDICATORS/HORN

Multifunction switch controls lights and indicators.

TEST PROCEDURE

Voltage

12V at BROWN, GREEN, LIGHT GREEN/BROWNwires to EARTH.

PinNo.

LoomSideC074

SwitchSideC074

Function

1 R R Side light

2 G/W LU Right hand Indicator

3 G/R LU/B Left hand Indicator

4 U/W B Main beam

5 N 12V S Supply -- side lights,dip, main

6 LG/N 12V W/B Supply -- indicators

7 U/R S/B Dip beam

8 G 12V P/B Supply -- Horn,Flash

9 P P Horn


604.55.041.01 10--1998

8x2 12x12 24x24 16x16

! ! !

35. MULTIFUNCTION WIPER/WASHERSWITCH

Multifunctions switch controls wipers, washer andhorn


604.55.041.01 10--1998

TEST PROCEDURE

Voltage Test

Pin No. Wire ColourConnector

C073

Wire ColourConnector

C073

Function Voltage at C073Multifunction Switch

C073Loom Side

C073Switch Side

With C088,Wiper MotorConnected

With C088,Wiper Motor

Disconnected

1 LG/O N Intermittent Wipe 1.5 1.5

2 R/LG S Slow Wipe 12 0

3 W/LG U Fast Wipe 12 0

4 G/O/B W Park Wipers 0 0

5 LG/U U/R Washer 12 12

6 B R Earth 0 0

Continuity Test

Pin No. Function Selected Continuity to Pin

6 Intermittent Wipe 1

6 Slow Wipe 2

6 Fast Wipe 3

6 Wash 5

5 Wash in Intermittent 1

5 Wash in Slow Wipe 2

5 Wash in Fast Wipe 3

2 Off 4

2 Intermittent 4

section 55 -- electrics chapter 10 -- component testing · 2017-07-26 · warning lamp associated...

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