050 diagnosis and testing vehicle dynamic suspension

7/22/2019 050 Diagnosis and Testing Vehicle Dynamic Suspension

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Published: Mar 14, 2006

Vehicle Dynamic Suspension

Overview

For information on the operation of the system,

Vehicle Dynamic Suspension

Inspection and Verification

1 . Verify the customer concern.

2 . Confirm which, if any, warning lights and/or messages were displayed on the instrument cluster. For a list of messages,Information and Message Center

3 . Visually inspect for obvious mechanical or electrical faults.

Mechanical Electrical

Air leakageAir springsReservoirCompressorCompressor air filterPipework and unionsSensor fitmentValve block(s)

BatteryFuse(s)Wiring harness physical damage or water ingressLoose or corroded electrical connectorsAir suspension control switchController area network (CAN) circuitsSensorsValve block(s)Air suspension control module

4 . If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the

next step.

5 . Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before moving ontothe symptom chart or DTC index.

Make sure that all DTCs are cleared following rectification.

Symptom Chart

SymptomPossiblemessage

Possible otherwarnings

Possible causes Action

Vehicle onbump stops

Suspensionfault

Two chimesrepeatedregularly.Redindicatorpermanentlyilluminated

Water ingress towiring harness orconnectorsAir leak(s)Vehicle intransportationmodeSystem notcalibrated orcalibration corruptImplausiblearticulationsymptoms

detectedFailure of multipleheight sensors

Visually inspect the wiring harnessand connectors for water ingress.Visually inspect the system for airleakage. Check the system modeand calibration using the approveddiagnostic system. Check forimplausible articulation symptoms,i.e. height sensor or linkage fault,deflated air spring, under inflated tireetc. Note implausible articulationsymptoms may be caused by an un-

calibrated height sensor. Check forheight sensor DTCs and refer to theDTC index. Refer to the warranty


2/23



Air suspensioncontrol modulefailure

policy and procedures manual if amodule is suspect.

Vehicle doesnot sit level

Suspensionfault

Two chimesrepeatedregularly.Redindicatorpermanentlyilluminated

Water ingress towiring harness orconnectorsAir leak(s)Calibration corruptcross-link valvefaultHeight sensor faultReservoir valvestuck openExhaust valvestuck closedCorner valvesstuck openAir suspensioncontrol modulefailure

Visually inspect the wiring harnessand connectors for water ingress.Visually inspect the system for airleakage and refer to the guideddiagnostic routine on the approveddiagnostic system. Check thesystem calibration using theapproved diagnostic system. Forfront and rear cross link valve testsrefer to the guided diagnostic routineon the approved diagnostic system.Check for height sensor DTCs andrefer to the DTC index. For reservoirand exhaust valve tests refer to theguided diagnostic routine on theapproved diagnostic system. Checkfor corner valve DTCs and refer tothe DTC index. Refer to the warranty

policy and procedures manual if amodule is suspect.

Vehicle sitstoo low

SuspensionfaultHDC (hilldescentcontrol)fault

system notavailableDSC(Dynamicstabilitycontrol)

Twochimes,amberindicatorpermanentlyilluminatedOne chime

DSC amberindicatorpermanentlyilluminatedABSindicatorpermanentlyilluminated

Water ingress towiring harness orconnectorsAir leak(s)Air suspensioncompressortemperaturesensor faultInlet air filterblockage/restrictionAir suspension

compressor faultExhaust valvestuck/stickingAir suspensioncontrol module lostcommunicationwith ABS moduleABS faultAir suspensioncontrol modulefailure

Visually inspect the wiring harnessand connectors for water ingress.Visually inspect the system for airleakage. For air compressortemperature sensor, inlet air filter,exhaust valve and air compressortests refer to the guided diagnosticroutine on the approved diagnosticsystem. For air suspension control

module lost communication with ABSmodule, refer to the lostcommunication codes statement atthe end of this table. Check for ABSDTCs,Anti-Lock Control - Traction ControlAnti-Lock Control - Stability AssistRefer to the warranty policy andprocedures manual if a module issuspect.

Vehicle sitstoo high

Suspensionfault

Twochimes,amberindicatorpermanentlyilluminated

Reservoir valve

stuck openExhaust valvestuck closedCorner valvesstuck openAir suspensioncontrol modulefailure

For reservoir valve and exhaustvalve tests refer to the guideddiagnostic routine on the approveddiagnostic system. Check for cornervalve DTCs and refer to the DTCindex. Refer to the warranty policyand procedures manual if a moduleis suspect.

Systemdetects

extendedmodeunnecessarily

- -

Crossed galleryand air springpipesIncorrect valve

block fitted to frontor rearDamage or

Refer to the guided diagnosticroutine on the approved diagnosticsystem.


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when lowering blockage in airharness

Vehicleleans/tiltsafter beingleft over-nightor for some

days

- -

Leaking airspring(s)Leak from cornervalve to galleryExhaust valvestuck open


After vehicleleft over-nightor for somedays systemregularlyindicates"Suspensionvehicle raisingslowly" whenfirst driving off

Suspensionvehicleraisingslowly

-Leaking airspring(s)Leaking reservoir


DTC index

NOTE:

Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scantool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by themanufacturer-approved diagnostic system).

NOTE:

Intermittent faults may cause DTCs to be logged, however some DTCs may be cleared during an ignition off, ignitionon cycle. Carry out a road test (if safe to do so), check the functionality of the system and retrieve any DTCs beforeturning the ignition off.

DTC Description Possible causes Action

B1A8455

Carconfigurationdata does notmatch thatexpected forVIN range

Air suspensionincorrectlyconfigured

Configure the system using the approved diagnostic system.Clear the DTC and test for normal operation.

C112201

Servotronicsteering valve,general

electricalfailure

Servotronic steeringvalve disconnectedServotronic steeringvalve circuit(s): highresistance, short

circuit to groundServotronic steeringvalve fault

Refer to the guided diagnostic routine for this code on the

approved diagnostic system.

C11231C

Servotronicsteering valve,circuit voltageout of range

Servotronic steeringvalve supply circuit:high resistanceServotronic steeringvalve supply circuit:short circuit togroundServotronic steeringvalve supply circuit:short circuit to powerServotronic steeringvalve fault

Refer to the guided diagnostic routine for this code on theapproved diagnostic system.


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C112F72

Air springvalve,repeated orfrequent levelactivity in thedown direction

Corner valve stuckopenCorner valve leak togallery

Refer to the approved diagnostic system for corner valve checks.

C113066

Air spring air

supply,repeated orfrequent levelactivity in theup direction

Air spring leakAir harness leakCorner valve leak togalleryExhaust valve stuckopen

Visually inspect the system for air leakage. Refer to the guideddiagnostic routine for this code on the approved diagnosticsystem.

C11307AAir spring airsupply, unableto lift

Detached air pipeLoose or burst airpipeExcessive air springleakHeight sensor stuckHeight sensor failureBlockage in airharness

Visually inspect the system for an excessive air leak. Check theheight sensor linkage(s) for damage/restrictions. Visually inspectthe air harness for evidence of melting, crushing, kinking orcollapsing. Refer to the guided diagnostic routine for this code onthe approved diagnostic system.

C113192

Air supply,unable topressurizegallery

Insufficient pressurefrom compressorDetached air pipeLoose or burst airpipeReservoir valveblock pipesincorrectly fitted(unions reversed)Pressure sensorfault

Visually inspect the system for air leakage. Check the reservoirvalve block pipes for correct routing and installation.

C1A001C

Battery voltageout of range(too low tooperate airsuspension)

Low battery voltageOne or more valvesupplies: intermittentshort circuit toground

Check the battery charge and condition. Refer to the guideddiagnostic routine for this code on the approved diagnosticsystem.

C1A001DIsolationswitch current

monitor

One or more valvesupplies: shortcircuit to groundRear valve blockdisconnected


Refer to the guided diagnostic routine for this code on theapproved diagnostic system. Refer to the warranty policy and

procedures manual if a module is suspect.

C1A0049Air suspensioncontrol modulefailure

Water ingress tovalve wiring harnessor connector(s)Valve supplycircuit(s): shortcircuit to powerAir suspensioncontrol module,internal electrical

failure

Visually inspect the wiring harness and connectors for wateringress. Refer to the guided diagnostic routine for this code onthe approved diagnostic system. Refer to the warranty policy andprocedures manual if a module is suspect.

This is not a fault,


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C1A0053Systemdeflated

the system has beendeflated using thediagnostic routine

Carry out air suspension deflation exit routine using the approveddiagnostic system or the routine listed at the end of this section.

C1A0054

Air suspensioncontrol

module,missingcalibration

Air suspensioncontrol module notcalibratedAir suspensioncontrol module has

been set intomanufacturing,calibration or tighttolerance mode

Calibrate the system using the approved diagnostic system.

Clear the DTC and test for normal operation.

C1A0119

Switch packLEDovercurrent(hardwareprotection)

LED circuit: shortcircuit to powerOne or more LEDsshort circuit to eachother


C1A031C

Left-hand frontheight sensor,signal voltageout of range

Water ingress to

wiring harness orconnectorsHeight sensorlinkagedisconnectedHeight sensorlinkagedamaged/bentHeight sensordisconnectedHeight sensorlinkage toggledHeight sensorbracket

damaged/bentHeight sensorincorrectly installedHeight sensorinstalled on wrongside of vehicleHeight sensorharness wiring: shortcircuit to ground,short circuit topower, highresistanceHeight sensor failure

Incorrect heightcalibrationAir suspensioncontrol modulefailure

Visually inspect the wiring harness and connectors for wateringress. For height sensor linkage, mounting and circuit testsrefer to the guided diagnostic routine on the approved diagnostic

system. Check the height sensor bracket condition and security.Check the height sensor for correct fitment and torque of fixings.If any height sensor fixings are slackened or found to be loose,or a height sensor has been changed, the vehicle ride heightmust be re-calibrated. Calibrate the system using the approveddiagnostic system. Refer to the warranty policy and proceduresmanual if a module is suspect.

C1A0326

Left-hand frontheight sensor,signal voltagestuck whilst

Water ingress towiring harness orconnectorsHeight sensorlinkagedisconnectedHeight sensor

harness wiring: shortcircuit to ground,short circuit to

Visually inspect the wiring harness and connectors for wateringress. Refer to the guided diagnostic routine for this code onthe approved diagnostic system. Refer to the warranty policy and


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driven

power, highresistanceHeight sensor failureAir suspensioncontrol modulefailure

.

C1A0329Left-hand frontheight sensor,signal invalid

Water ingress towiring harness or

connectorsHeight sensorlinkagedamaged/bentHeight sensorbracketdamaged/bentHeight sensorincorrectly installedHeight sensorharness wiring: shortcircuit to ground,short circuit to

power, highresistanceHeight sensor failureIncorrect heightcalibration process

Visually inspect the wiring harness and connectors for wateringress. Refer to the guided diagnostic routine for this code onthe approved diagnostic system. Check the height sensorbracket condition and security. Check the height sensor forcorrect fitment and torque of fixings. If any height sensor fixingsare slackened or found to be loose, or a height sensor has beenchanged, the vehicle ride height must be re-calibrated. Calibratethe system using the approved diagnostic system.

C1A0392

Left-hand frontheight sensor,heightchangingslower thanexpected

Suspensionprevented frommovingHeight sensorincorrectly installedAir spring leakAir harness leak

Blocked/damagedair harnessBlocked/damagedgallery pipeCorner valve stuckclosedFront or rear valveblock pipesincorrectly fitted(unions reversed)Reservoir valveblock pipesincorrectly fitted

(unions reversed)Reservoir valvestuck openExhaust valve stuckclosedCorner valve air leakPressure sensorfaultHeight sensor failure

Check that the vehicle is free of obstructions. Check the heightsensor for correct fitment and torque of fixings. If any heightsensor fixings are slackened or found to be loose, or a heightsensor has been changed, the vehicle ride height must be re-calibrated. Calibrate the system using the approved diagnosticsystem. Refer to the guided diagnostic routine for this code onthe approved diagnostic system. Check for an air spring leak.Check the air harness for evidence of melting, crushing, kinkingor collapsing. Check the front and rear valve block pipes forcorrect routing and installation. Check the reservoir valve blockpipes for correct routing and installation. Refer to the approveddiagnostic system for corner, reservoir and exhaust valve

checks. Check the corner valve for leaks.

Water ingress towiring harness orconnectors

Height sensorlinkagedisconnected


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C1A041C

Right-handfront heightsensor, signalvoltage out ofrange

Height sensorlinkagedamaged/bentHeight sensordisconnectedHeight sensorlinkage toggledHeight sensorbracket

damaged/bentHeight sensorincorrectly installedHeight sensorinstalled on wrongside of vehicleHeight sensorharness wiring: shortcircuit to ground,short circuit topower, highresistanceHeight sensor failure

Incorrect heightcalibrationAir suspensioncontrol modulefailure

Visually inspect the wiring harness and connectors for wateringress. Refer to the guided diagnostic routine for this code onthe approved diagnostic system. Check the height sensorbracket condition and security. Check the height sensor forcorrect fitment and torque of fixings. If any height sensor fixingsare slackened or found to be loose, or a height sensor has beenchanged, the vehicle ride height must be re-calibrated. Calibratethe system using the approved diagnostic system. Refer to thewarranty policy and procedures manual if a module is suspect.

C1A0426

Right-handfront height

sensor, signalvoltage stuckwhilst vehicleis driven


harness wiring: shortcircuit to ground,short circuit topower, highresistanceHeight sensor failureAir suspensioncontrol modulefailure

Visually inspect the wiring harness and connectors for water

ingress. Refer to the guided diagnostic routine for this code onthe approved diagnostic system. Refer to the warranty policy andprocedures manual if a module is suspect.

C1A0429

Right-handfront heightsensor, signalinvalid

Water ingress towiring harness orconnectors

Height sensorlinkagedamaged/bentHeight sensorbracketdamaged/bentHeight sensorincorrectly installedHeight sensorharness wiring: shortcircuit to ground,short circuit topower, highresistanceHeight sensor failureIncorrect heightcalibration process



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C1A0492

Right-handfront heightsensor, heightchangingslower thanexpected

Suspensionprevented frommovingHeight sensorincorrectly installedAir spring leakAir harness leakBlocked/damaged

air harnessBlocked/damagedgallery pipeCorner valve stuckclosedFront or rear valveblock pipesincorrectly fitted(unions reversed)Reservoir valveblock pipesincorrectly fitted(unions reversed)

Reservoir valvestuck openExhaust valve stuckclosedCorner valve air leakPressure sensorfaultHeight sensor failure

Check that the vehicle is free of obstructions. Check the heightsensor for correct fitment and torque of fixings. If any heightsensor fixings are slackened or found to be loose, or a heightsensor has been changed, the vehicle ride height must be re-calibrated. Calibrate the system using the approved diagnosticsystem. Refer to the guided diagnostic routine for this code onthe approved diagnostic system. Check for an air spring leak.Check the air harness for evidence of melting, crushing, kinkingor collapsing. Check the front and rear valve block pipes forcorrect routing and installation. Check the reservoir valve blockpipes for correct routing and installation. Refer to the approveddiagnostic system for corner, reservoir and exhaust valvechecks. Check the corner valve for leaks.

C1A051C

Left-hand rearheight sensor,

signal voltageout of range

Water ingress towiring harness orconnectorsHeight sensor

linkagedisconnectedHeight sensorlinkagedamaged/bentHeight sensordisconnectedHeight sensorlinkage toggledHeight sensorbracketdamaged/bentHeight sensor

incorrectly installedHeight sensorinstalled on wrongside of vehicleHeight sensorharness wiring: shortcircuit to ground,short circuit topower, highresistanceHeight sensor failureIncorrect heightcalibrationAir suspensioncontrol modulefailure

Visually inspect the wiring harness and connectors for wateringress. Refer to the guided diagnostic routine for this code onthe approved diagnostic system. Check the height sensorbracket condition and security. Check the height sensor forcorrect fitment and torque of fixings. If any height sensor fixings

are slackened or found to be loose, or a height sensor has beenchanged, the vehicle ride height must be re-calibrated. Calibratethe system using the approved diagnostic system. Refer to thewarranty policy and procedures manual if a module is suspect.


9/23



C1A0526

Left-hand rearheight sensor,signal voltage

stuck whilstvehicle isdriven

Water ingress towiring harness orconnectorsHeight sensorlinkagedisconnectedHeight sensorharness wiring: shortcircuit to ground,

short circuit topower, highresistanceHeight sensor failureAir suspensioncontrol modulefailure

Visually inspect the wiring harness and connectors for wateringress. Refer to the guided diagnostic routine for this code on

the approved diagnostic system. Refer to the warranty policy andprocedures manual if a module is suspect.

C1A0529Left-hand rearheight sensor,signal invalid

Water ingress towiring harness orconnectorsHeight sensorlinkage

damaged/bentHeight sensorbracketdamaged/bentHeight sensorincorrectly installedHeight sensorharness wiring: shortcircuit to ground,short circuit topower, highresistanceHeight sensor failure

Incorrect heightcalibration process


C1A0592

Left-hand rearheight sensor,heightchangingslower thanexpected

Suspensionprevented frommovingHeight sensorincorrectly installedAir spring leakAir harness leakBlocked/damagedair harnessBlocked/damaged

gallery pipeCorner valve stuckclosedFront or rear valveblock pipesincorrectly fitted(unions reversed)Reservoir valveblock pipesincorrectly fitted(unions reversed)Reservoir valvestuck open

Exhaust valve stuckclosedCorner valve air leak

Check that the vehicle is free of obstructions. Check the heightsensor for correct fitment and torque of fixings. If any height

sensor fixings are slackened or found to be loose, or a heightsensor has been changed, the vehicle ride height must be re-calibrated. Calibrate the system using the approved diagnosticsystem. Refer to the guided diagnostic routine for this code onthe approved diagnostic system. Check for an air spring leak.Check the air harness for evidence of melting, crushing, kinkingor collapsing. Check the front and rear valve block pipes forcorrect routing and installation. Check the reservoir valve blockpipes for correct routing and installation. Refer to the approveddiagnostic system for corner, reservoir and exhaust valvechecks. Check the corner valve for leaks.


10/23



Pressure sensorfaultHeight sensor failure

C1A061C

Right-handrear heightsensor, signalvoltage out ofrange

Water ingress towiring harness orconnectorsHeight sensorlinkage

disconnectedHeight sensorlinkagedamaged/bentHeight sensordisconnectedHeight sensorlinkage toggledHeight sensorbracketdamaged/bentHeight sensorincorrectly installed

Height sensorinstalled on wrongside of vehicleHeight sensorharness wiring: shortcircuit to ground,short circuit topower, highresistanceHeight sensor failureIncorrect heightcalibrationAir suspension

control modulefailure


C1A0626

Right-handrear heightsensor, signalvoltage stuckwhilst vehicle

is driven

Water ingress towiring harness orconnectorsHeight sensorlinkagedisconnectedHeight sensorharness wiring: shortcircuit to ground,short circuit to

power, highresistanceHeight sensor failureAir suspensioncontrol modulefailure


Right-hand

Water ingress towiring harness orconnectorsHeight sensorlinkagedamaged/bent

Height sensorbracketdamaged/bent

Visually inspect the wiring harness and connectors for wateringress. Refer to the guided diagnostic routine for this code onthe approved diagnostic system. Check the height sensor


11/23



C1A0629rear heightsensor, signalinvalid

incorrectly installedHeight sensorharness wiring: shortcircuit to ground,short circuit topower, highresistanceHeight sensor failure

Incorrect heightcalibration process

bracket condition and security. Check the height sensor forcorrect fitment and torque of fixings. If any height sensor fixingsare slackened or found to be loose, or a height sensor has beenchanged, the vehicle ride height must be re-calibrated. Calibratethe system using the approved diagnostic system.

C1A0692

Right-handrear heightsensor, heightchangingslower thanexpected

Suspensionprevented frommovingHeight sensorincorrectly installedAir spring leakAir harness leakBlocked/damagedair harnessBlocked/damaged

gallery pipeCorner valve stuckclosedFront or rear valveblock pipesincorrectly fitted(unions reversed)Reservoir valveblock pipesincorrectly fitted(unions reversed)Reservoir valvestuck openExhaust valve stuck

closedCorner valve air leakPressure sensorfaultHeight sensor failure

Check that the vehicle is free of obstructions. Check the heightsensor for correct fitment and torque of fixings. If any height

sensor fixings are slackened or found to be loose, or a heightsensor has been changed, the vehicle ride height must be re-calibrated. Calibrate the system using the approved diagnosticsystem. Refer to the guided diagnostic routine for this code onthe approved diagnostic system. Check for an air spring leak.Check the air harness for evidence of melting, crushing, kinkingor collapsing. Check the front and rear valve block pipes forcorrect routing and installation. Check the reservoir valve blockpipes for correct routing and installation. Refer to the approveddiagnostic system for corner, reservoir and exhaust valvechecks. Check the corner valve for leaks.

C1A0762

Crossarticulation,too large whilstvehicle isdriven

Water ingress towiring harness orconnectorsHeight sensorlinkagedamaged/bentHeight sensor

linkageloose/disconnectedHeight sensorbracketdamaged/bentHeight sensorharness wiring: shortcircuit to ground,short circuit topower, highresistanceHeight sensorremoved and

reinstalled withoutbeing recalibratedNew height sensor

Visually inspect the wiring harness and connectors for wateringress. Refer to the guided diagnostic routine for this code onthe approved diagnostic system. Check the condition andsecurity of the height sensor bracket(s). Check the height sensorfor correct fitment and torque of fixings. If any height sensorfixings are slackened or found to be loose, or a height sensorhas been changed, the vehicle ride height must be re-calibrated.Calibrate the system using the approved diagnostic system.


12/23



installed withoutcalibrationIncorrect heightcalibrationHeight sensor failure

C1A081C

Pressuresensor supplyvoltage out ofrange

Pressure sensorharness wiring: shortcircuit to ground,

short circuit topower, highresistancePressure sensorfailureAir suspensioncontrol modulefailure

Refer to the guided diagnostic routine for this code on theapproved diagnostic system. Refer to the warranty policy andprocedures manual if a module is suspect.

C1A091C

Pressuresensor signalvoltage out ofrange

Pressure sensordisconnectedPressure sensorharness wiring: short

circuit to ground,short circuit topower, highresistancePressure sensorfailureAir suspensioncontrol modulefailure


C1A1064

Pressurefluctuateswhen thesystem isinactive

Reservoir and airspring pipesincorrectly fitted to

front or rear valveblock (unionsreversed)Corner valve stuckopenPressure sensorharness wiring: shortcircuit to ground,short circuit topower, highresistancePressure sensorfailure


Check the reservoir and air spring pipes for correct routing andinstallation. Refer to the guided diagnostic routine for this codeon the approved diagnostic system. Refer to the warranty policyand procedures manual if a module is suspect.

C1A1164

Pressureincreases

when thesystem isinactive

Reservoir and airspring pipesincorrectly fitted tofront or rear valveblock (unionsreversed)Corner valve internalleakReservoir valve

internal leakPressure sensorharness wiring: short

Check the reservoir and air spring pipes for correct routing andinstallation. For corner valve, reservoir valve, pressure sensorand circuit tests refer to the guided diagnostic routine for thiscode on the approved diagnostic system.


13/23



circuit to ground,short circuit topower, highresistancePressure sensorfailure

C1A1364

Pressure doesnot decreasewhen ventingthe gallery

Exhaust valve stuckclosed

Exhaust valve doesnot hold minimumretention pressureGallery pipeblocked/damagedPressure sensorfaultAir suspensionexhaust silencerblocked/restrictedAir suspensionexhaust pipeblocked/damaged

Reservoir valveblock pipesincorrectly fitted(unions reversed)

Refer to the guided diagnostic routine for this code on theapproved diagnostic system. Check the air suspension exhaustpipe and silencer for blockage/restriction. Check the reservoirvalve block pipes for correct routing and installation.

C1A1864

Pressureincrease toorapid whenfilling reservoir

Reservoir valvestuck closedReservoir pipeblocked/damagedReservoir portblocked/restrictedPressure sensorfault


C1A2064

Pressureincrease tooslow whenfilling reservoir

Compressor faultReservoir pipe airleakReservoir air leakGallery pipe air leakIntake filterblocked/restrictedIntake pipeblocked/restrictedAir suspensionintake silencerblocked/restricted

Corner valve stuckopenPressure sensorfault

Refer to the guided diagnostic routine for this code on theapproved diagnostic system. Check the air suspension intakepipe and silencer for blockage/restriction.

C1A2464

Notemperatureincrease when

compressorrequested

Air compressor:cylinder headtemperature sensordisconnectedAir compressor:cylinder headtemperature sensordetached from

cylinder headAir compressor:cylinder head

Check the security of the compressor cylinder head temperaturesensor and electrical connection. Refer to the guided diagnostic

routine for this code on the approved diagnostic system.


14/23



temperature sensorfaultAir compressor fault

C1A2467

Temperaturetakes too longto read aftersuitablecompressorruntime

Air compressor:cylinder headtemperature sensordisconnectedAir compressor:

cylinder headtemperature sensorfaultAir compressordisconnectedAir compressorground circuit: highresistanceAir compressor fault

Check the security of the compressor cylinder head temperaturesensor and electrical connection. Refer to the guided diagnosticroutine for this code on the approved diagnostic system.

C1A2616Temperaturesensor voltageout of range

Air compressorcylinder headtemperature sensor

harness wiring: shortcircuit to ground,short circuit topower, highresistanceAir suspensioncontrol modulefailure


C1A2712

Compressorvoltage

present whencompressornot requested

Air compressorharness wiring: shortcircuit to powerAir compressor relay

faultAir suspensioncontrol modulefailure


approved diagnostic system. Refer to the warranty policy andprocedures manual if a module is suspect.

C1A2714

Compressorvoltage notpresent when

compressorrequested

Battery junction box(BJB) Fuse 3E failedBJB Fuse 10Efailed/not fittedAir compressorharness wiring: shortcircuit to ground,high resistance

Air compressor relayfailureAir suspensioncontrol modulefailure

Check/replace fuses 3E and 10E as necessary. Refer to theguided diagnostic routine for this code on the approveddiagnostic system. Refer to the warranty policy and procedures

manual if a module is suspect.

C1A2729

Compressorrelay controlvoltage, signalinvalid

Air compressorharness wiring: shortcircuit to powerAir compressor relayfaultAir suspensioncontrol modulefailure

C1A2712 will be set first. Refer to the guided diagnostic routinefor this code on the approved diagnostic system. Refer to thewarranty policy and procedures manual if a module is suspect.


15/23



C1A2864

Wrong numberof LEDsilluminated on

switch pack

BJB Fuse 26E failedSwitch pack harnesswiring: short circuitto ground, shortcircuit to power, highresistanceLED circuit: shortcircuit to powerOne or more LEDs

short circuit to eachotherSwitch pack failureAir suspensioncontrol modulefailure

Check/replace fuse 26E as necessary. Refer to the guideddiagnostic routine for this code on the approved diagnosticsystem. Refer to the warranty policy and procedures manual if a

module is suspect.

C1A2992

Ride heightchange switchactivation toolong

Switch pressed formore than 255secondsSwitch pack harnesswiring: short circuitto ground, short

circuit to power, highresistanceSwitch pack failureAir suspensioncontrol modulefailure


approved diagnostic system. Refer to the warranty policy andprocedures manual if a module is suspect.

C1A3064

Raise andlower switchesactivated atsame time

BJB Fuse 26E failedSwitch pack harnesswiring: short circuitto ground, shortcircuit to power, highresistance

Switch pack failureAir suspensioncontrol modulefailure

Check/replace fuse 26E as necessary. Refer to the guideddiagnostic routine for this code on the approved diagnosticsystem. Refer to the warranty policy and procedures manual if amodule is suspect.

C1A3101

Left-hand frontcorner valve,generalelectricalfailure

Front valve blockdisconnectedFront valve blockharness wiring: shortcircuit to ground,high resistanceLeft-hand frontcorner valve failure



C1A3201

Right-handfront cornervalve, generalelectricalfailure

Front valve blockdisconnectedFront valve blockharness wiring: shortcircuit to ground,high resistanceRight-hand frontcorner valve failureAir suspension




16/23



C1A3301

Left-hand rearcorner valve,generalelectricalfailure

Rear valve blockdisconnectedRear valve blockharness wiring: shortcircuit to ground,high resistanceLeft-hand rearcorner valve failureAir suspension



C1A3401

Right-handrear cornervalve, generalelectricalfailure

Rear valve blockdisconnectedRear valve blockharness wiring: shortcircuit to ground,high resistanceRight-hand rearcorner valve failureAir suspensioncontrol module

failure


C1A3501

Reservoirvalve, generalelectricalfailure

Reservoir valveblock disconnectedReservoir valveblock harnesswiring: short circuitto ground, highresistanceReservoir valveblock failureAir suspensioncontrol module

failure


C1A3601

Exhaust valve,generalelectricalfailure

Exhaust valvedisconnectedExhaust valveharness wiring: shortcircuit to ground,high resistanceExhaust valve failureAir suspensioncontrol modulefailure


C1A3701

Front cross-link valve,generalelectricalfailure

Front valve blockdisconnectedFront valve blockharness wiring: shortcircuit to ground,high resistanceFront cross-linkvalve failureAir suspensioncontrol modulefailure


-

Rear valve blockdisconnectedRear valve blockharness wiring: short


17/23



C1A3801

-link valve,generalelectricalfailure

circuit to ground,high resistanceRear cross-linkvalve failureAir suspensioncontrol modulefailure


C1A5501

Ignition switch

input circuit,ignition onwhile wake-upoff or ignitionoff whileengine running

Ignition switch inputcircuit: short circuitto ground, shortcircuit to power, highresistance


C1A681C

Left-hand frontheight sensorsupply, circuitvoltage out ofrange

Height sensorharness wiring: shortcircuit to ground,short circuit topower, highresistanceHeight sensor failureAir suspensioncontrol modulefailure


C1A691C

Right-handfront heightsensor supply,circuit voltageout of range



C1A701C

Left-hand rearheight sensorsupply, circuitvoltage out ofrange



C1A711C

Right-handrear heightsensor supply,circuit voltageout of range



Water ingress to

wiring harness orconnectorsHeight sensor


18/23



C1A721C

Left-hand frontheight sensorsignal voltageout of range(mechanical)

linkagedisconnectedHeight sensorlinkagedamaged/bentHeight sensordisconnectedHeight sensorlinkage toggled

Height sensorbracketdamaged/bentHeight sensorincorrectly installedIncorrect heightcalibrationHeight sensorharness wiring: shortcircuit to ground,short circuit topower, highresistance

Height sensor failureAir suspensioncontrol modulefailure

Visually inspect the wiring harness and connectors for wateringress. Refer to the guided diagnostic routine for this code on

the approved diagnostic system. Check the height sensorbracket condition and security. Check the height sensor forcorrect fitment and torque of fixings. If any height sensor fixingsare slackened or found to be loose, or a height sensor has beenchanged, the vehicle ride height must be re-calibrated. Calibratethe system using the approved diagnostic system. Refer to thewarranty policy and procedures manual if a module is suspect.

C1A731C

Right-handfront heightsensor signalvoltage out ofrange(mechanical)

Water ingress towiring harness orconnectorsHeight sensorlinkagedisconnectedHeight sensorlinkage

damaged/bentHeight sensordisconnectedHeight sensorlinkage toggledHeight sensorbracketdamaged/bentHeight sensorincorrectly installedIncorrect heightcalibrationHeight sensorharness wiring: shortcircuit to ground,short circuit topower, highresistanceHeight sensor failureAir suspensioncontrol modulefailure




19/23


20/23




C1B1903

Door status

signal, pulsewidthmodulatedfailures

Incorrect softwareloaded to airsuspension controlmoduleCentral junction boxto air suspension

module harnesswiring: short circuitto ground, shortcircuit to power, highresistanceCentral junction boxfault


C1B211C

Compressor

brush cardtemperaturesensor circuit,voltage out ofrange

Compressor brushcard temperaturesensor harnesswiring: short circuitto ground, short

circuit to power, highresistanceCompressor brushcard temperaturesensor failureAir suspensioncontrol modulefailure


U007388CAN bus fault,bus off

CAN busconnections shortcircuit to each other Communications Network

U010087

Lostcommunicationwith enginecontrol module(ECM)

CAN bus faultECM disconnectedECM not configuredECM failure

Communications Network

U010187

Lostcommunicationwithtransmissioncontrol module(TCM)

CAN bus faultTCM disconnectedTCM not configuredTCM failure


U010287

Lostcommunicationwith transferbox controlmodule

CAN bus fault

Transfer box controlmoduledisconnectedTransfer box controlmodule notconfiguredTransfer box controlmodule failure


U012287

Lostcommunication

with ABSmodule

CAN bus faultABS moduledisconnectedABS module not

configuredABS module failure



21/23



U012687

Lostcommunicationwith steeringangle sensor(SAS) module

CAN bus faultSAS moduledisconnectedSAS module notconfigured/calibratedSAS module failure


U012887

Lostcommunicationwith parkingbrake module

CAN bus faultParking brake

moduledisconnectedParking brakemodule notconfiguredParking brakemodule failure


U013387

Lostcommunicationwith active

stabilizationsystem

CAN bus faultActive stabilizationsystem moduledisconnectedActive stabilization

system module notconfiguredABS module failure


U013687

Lostcommunicationwith electronicrear differentialcontrol module

CAN bus faultElectronic reardifferential controlmoduledisconnectedElectronic reardifferential controlmodule notconfigured

Electronic reardifferential controlmodule failure


U015587

Lostcommunicationwithinstrumentcluster

CAN bus faultInstrument clusterdisconnectedInstrument clusternot configuredInstrument clusterfailure


U030055

Internal controlmodulesoftwareincompatibility,not configured

Incorrect softwareloadedCAN wiring toinstrument cluster:high resistanceIncorrect instrumentcluster CANconfiguration

Configure the air suspension control module and instrumentcluster as necessary using the approved diagnostic system.

U040186

Invalid datareceived fromengine controlmodule (ECM)

Engine managementsystem (EMS) fault


U041686Invalid datareceived fromABS module

ABS faultCommunications Network


22/23



U041786

Invalid datareceived fromparking brakemodule

Parking brake faultCommunications Network

U042886

Invalid datareceived fromsteering anglesensor (SAS)module

SAS module notconfigured/calibratedSAS fault

Check the security of the electrical connection.Configure/calibrate the SAS using the approved diagnosticsystem.Communications Network

U043486

Invalid datareceived fromactivestabilizationsystemmodule

Active stabilizationsystem fault


U1A1387

Lostcommunicationwith terrainoptimization

switch

CAN bus faultTerrain optimizationswitch disconnectedTerrain responsemodule notconfigured

Terrain responsemodule failure


U1A1449CANinitializationfailure

Internal electronicfailure


U1A3562

VIN frominstrumentcluster doesnot match VINat time ofcalibration

Air suspensioncontrol module hasbeen swapped withanother vehicleInstrument clusternot configured

Configure the instrument cluster using the approved diagnosticsystem.

U200067

Temperaturesensor voltagetakes too longto read aftersuitablecompressorruntime

Compressor brushcard temperaturesensor harnesswiring: short circuitto ground, shortcircuit to power, highresistanceCompressor brushcard temperaturesensor failureCompressor fault


U200701Valve circuitshort circuit toground

Water ingress towiring harness orconnectorsValve harnesswiring: short circuitto ground, highresistanceAir suspensioncontrol modulefailure

C1A001D will be set first. Visually inspect the wiring harness andconnectors for water ingress. Refer to the guided diagnosticroutine for this code on the approved diagnostic system.

Valve circuitshort circuit to

Water ingress towiring harness or

connectorsValve harnesswiring: short circuit Visually inspect the wiring harness and connectors for water


23/23


U200711 ground whensystem isinactive

to ground, highresistanceAir suspensioncontrol modulefailure

ingress. Refer to the guided diagnostic routine for this code onthe approved diagnostic system.

U200719Valve circuitcurrent abovethreshold

Valve supplycircuit(s) intermittent:short circuit toground, highresistanceValve failureAir suspensioncontrol modulefailure


U200767Valve signalincorrect afterevent

Water ingress towiring harness orconnectors (inparticular electricalconnector(s) C2527and C2528)Valve supplycircuit(s): shortcircuit to ground,short circuit topower, highresistanceAir suspensioncontrol modulefailure


Air suspension deflation exit routine

1 . Key on, engine off.

2 . Key off.

3 . Press and release raise switch.

4 . Press and release lower switch.

5 . Key on, engine off.

6 . Key on, engine running.

7 . Press and release raise switch twice.

8 . Press and release lower switch twice.

9 . Press and release raise switch.

050 diagnosis and testing vehicle dynamic suspension

Documents