07/16/2006 01:23 PM http://www.landrovertechinfo.com/extlrprod/frmviewit.jsp?szFrom=doc&iDocCode=276785 Page 1 of 23 http://www.landrovertechinfo.com/extlrprod/frmviewit.jsp?szFrom=doc&iDocCode=276785 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 leakage Air springs Reservoir Compressor Compressor air filter Pipework and unions Sensor fitment Valve block(s) Battery Fuse(s) Wiring harness physical damage or water ingress Loose or corroded electrical connectors Air suspension control switch Controller area network (CAN) circuits Sensors Valve 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 onto the symptom chart or DTC index. Make sure that all DTCs are cleared following rectification. Symptom Chart Symptom Possible message Possible other warnings Possible causes Action Vehicle on bump stops Suspension fault Two chimes repeated regularly. Red indicator permanently illuminated Water ingress to wiring harness or connectors Air leak(s) Vehicle in transportation mode System not calibrated or calibration corrupt Implausible articulation symptoms detected Failure of multiple height sensors Visually inspect the wiring harness and connectors for water ingress. Visually inspect the system for air leakage. Check the system mode and calibration using the approved diagnostic system. Check for implausible articulation symptoms, i.e. height sensor or linkage fault, deflated air spring, under inflated tire etc. Note implausible articulation symptoms may be caused by an un- calibrated height sensor. Check for height sensor DTCs and refer to the DTC index. Refer to the warranty
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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 thenext 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
Symptom Possiblemessage
Possible otherwarnings Possible causes Action
Vehicle onbump stops
Suspensionfault
Two chimesrepeatedregularly.Redindicatorpermanentlyilluminated
Water ingress towiring harness orconnectorsAir leak(s)Vehicle intransportationmodeSystem notcalibrated orcalibration corruptImplausiblearticulationsymptomsdetectedFailure 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
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 warrantypolicy and procedures manual if amodule is suspect.
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 controlmodule lost communication with ABSmodule, refer to the lostcommunication codes statement atthe end of this table. Check for ABSDTCs, Anti-Lock Control - Traction Control Anti-Lock Control - Stability AssistRefer to the warranty policy andprocedures manual if a module issuspect.
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.
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when lowering blockage in airharness
Vehicleleans/tiltsafter beingleft over-nightor for somedays
- -
Leaking airspring(s)Leak from cornervalve to galleryExhaust valvestuck open
Refer to the guided diagnosticroutine on the approved diagnosticsystem.
After vehicleleft over-nightor for somedays systemregularlyindicates"Suspensionvehicle raisingslowly" whenfirst driving off
Suspensionvehicleraisingslowly
-Leaking airspring(s)Leaking reservoir
Refer to the guided diagnosticroutine on the approved diagnosticsystem.
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.
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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 airsupply,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 currentmonitor
One or more valvesupplies: shortcircuit to groundRear valve blockdisconnectedAir 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.
C1A0049Air suspensioncontrol modulefailure
Water ingress tovalve wiring harnessor connector(s)Valve supplycircuit(s): shortcircuit to powerAir suspensioncontrol module,internal electricalfailure
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.
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C1A0053 Systemdeflated
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 suspensioncontrolmodule,missingcalibration
Air suspensioncontrol module notcalibratedAir suspensioncontrol module hasbeen 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
Refer to the guided diagnostic routine for this code on theapproved diagnostic system.
C1A031C
Left-hand frontheight sensor,signal voltageout of range
Water ingress towiring harness orconnectorsHeight sensorlinkagedisconnectedHeight sensorlinkagedamaged/bentHeight sensordisconnectedHeight sensorlinkage toggledHeight sensorbracketdamaged/bentHeight sensorincorrectly 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. For height sensor linkage, mounting and circuit testsrefer to the guided diagnostic routine on the approved diagnosticsystem. 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 whilstvehicle is
Water ingress towiring harness orconnectorsHeight sensorlinkagedisconnectedHeight sensorharness 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 andprocedures manual if a module is suspect.
Water ingress towiring harness orconnectorsHeight sensorlinkagedamaged/bentHeight sensorbracketdamaged/bentHeight sensorincorrectly installedHeight sensorharness wiring: shortcircuit to ground,short circuit topower, 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.
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.
Water ingress towiring harness orconnectorsHeight sensorlinkagedisconnected
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C1A041C
Right-handfront heightsensor, signalvoltage out ofrange
Height sensorlinkagedamaged/bentHeight sensordisconnectedHeight sensorlinkage toggledHeight sensorbracketdamaged/bentHeight sensorincorrectly 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 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.
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 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 orconnectorsHeight sensorlinkagedamaged/bentHeight sensorbracketdamaged/bentHeight sensorincorrectly installedHeight sensorharness wiring: shortcircuit to ground,short circuit topower, 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.
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 sensorlinkagedisconnectedHeight sensorlinkagedamaged/bentHeight sensordisconnectedHeight sensorlinkage toggledHeight sensorbracketdamaged/bentHeight sensorincorrectly 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 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.
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 onthe 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 sensorlinkagedamaged/bentHeight sensorbracketdamaged/bentHeight sensorincorrectly installedHeight sensorharness wiring: shortcircuit to ground,short circuit topower, 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.
Suspensionprevented frommovingHeight sensorincorrectly installedAir spring leakAir harness leakBlocked/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 leak
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.
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Pressure sensorfaultHeight sensor failure
C1A061C
Right-handrear heightsensor, signalvoltage out ofrange
Water ingress towiring harness orconnectorsHeight sensorlinkagedisconnectedHeight sensorlinkagedamaged/bentHeight sensordisconnectedHeight sensorlinkage toggledHeight sensorbracketdamaged/bentHeight sensorincorrectly 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 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.
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 onthe approved diagnostic system. Refer to the warranty policy andprocedures manual if a module is suspect.
Right-hand
Water ingress towiring harness orconnectorsHeight sensorlinkagedamaged/bentHeight sensorbracketdamaged/bentHeight 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 height sensor
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C1A0629 rear heightsensor, signalinvalid
Height sensorincorrectly installedHeight sensorharness wiring: shortcircuit to ground,short circuit topower, highresistanceHeight sensor failureIncorrect 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.
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.
C1A0762
Crossarticulation,too large whilstvehicle isdriven
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.
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.
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.
C1A1064
Pressurefluctuateswhen thesystem isinactive
Reservoir and airspring pipesincorrectly fitted tofront or rear valveblock (unionsreversed)Corner valve stuckopenPressure sensorharness wiring: shortcircuit to ground,short circuit topower, highresistancePressure sensorfailureAir suspensioncontrol modulefailure
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
Pressureincreaseswhen thesystem isinactive
Reservoir and airspring pipesincorrectly fitted tofront or rear valveblock (unionsreversed)Corner valve internalleakReservoir valveinternal 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.
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.
Refer to the guided diagnostic routine for this code on theapproved diagnostic system.
C1A2064
Pressureincrease tooslow whenfilling reservoir
Compressor faultReservoir pipe airleakReservoir air leakGallery pipe air leakIntake filterblocked/restrictedIntake pipeblocked/restrictedAir suspensionintake silencerblocked/restrictedCorner 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 whencompressorrequested
Air compressor:cylinder headtemperature sensordisconnectedAir compressor:cylinder headtemperature sensordetached fromcylinder headAir compressor:cylinder head
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.
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 sensorharness wiring: shortcircuit to ground,short circuit topower, highresistanceAir 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.
Air compressorharness wiring: shortcircuit to powerAir compressor relayfaultAir 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.
Battery junction box(BJB) Fuse 3E failedBJB Fuse 10Efailed/not fittedAir compressorharness wiring: shortcircuit to ground,high resistanceAir 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 proceduresmanual 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.
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C1A2864
Wrong numberof LEDsilluminated onswitch pack
BJB Fuse 26E failedSwitch pack harnesswiring: short circuitto ground, shortcircuit to power, highresistanceLED circuit: shortcircuit to powerOne or more LEDsshort 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 amodule is suspect.
C1A2992
Ride heightchange switchactivation toolong
Switch pressed formore than 255secondsSwitch pack harnesswiring: short circuitto ground, shortcircuit to power, highresistanceSwitch pack failureAir 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.
C1A3064
Raise andlower switchesactivated atsame time
BJB Fuse 26E failedSwitch pack harnesswiring: short circuitto ground, shortcircuit to power, highresistanceSwitch 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.
Front valve blockdisconnectedFront valve blockharness wiring: shortcircuit to ground,high resistanceLeft-hand frontcorner valve failureAir 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.
Front valve blockdisconnectedFront valve blockharness wiring: shortcircuit to ground,high resistanceRight-hand frontcorner valve failureAir 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.
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.
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.
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.
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.
C1A3701
Front cross-link valve,generalelectricalfailure
Front valve blockdisconnectedFront valve blockharness wiring: shortcircuit to ground,high resistanceFront cross-linkvalve failureAir 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.
Rear cross-
Rear valve blockdisconnectedRear valve blockharness wiring: short
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C1A3801
Rear cross-link valve,generalelectricalfailure
circuit to ground,high resistanceRear cross-linkvalve failureAir 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.
C1A5501
Ignition switchinput circuit,ignition onwhile wake-upoff or ignitionoff whileengine running
Ignition switch inputcircuit: short circuitto ground, shortcircuit to power, highresistance
Refer to the guided diagnostic routine for this code on theapproved diagnostic system.
C1A681C
Left-hand frontheight sensorsupply, circuitvoltage out ofrange
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.
C1A691C
Right-handfront heightsensor supply,circuit voltageout of range
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.
C1A701C
Left-hand rearheight sensorsupply, circuitvoltage out ofrange
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.
C1A711C
Right-handrear heightsensor supply,circuit voltageout of range
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.
Water ingress towiring harness orconnectorsHeight 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 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)
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.
Water ingress towiring harness orconnectorsHeight sensorlinkagedisconnectedHeight 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 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.
C1A751C
Right-handrear heightsensor signalvoltage out ofrange(mechanical)
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.
C1B1862
Inconsistentbatteryvoltagesreceived by airsuspensioncontrol module
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control modulefailure
C1B1903
Door statussignal, pulsewidthmodulatedfailures
Incorrect softwareloaded to airsuspension controlmoduleCentral junction boxto air suspensionmodule harnesswiring: short circuitto ground, shortcircuit to power, highresistanceCentral junction boxfault
Refer to the guided diagnostic routine for this code on theapproved diagnostic system.
C1B211C
Compressorbrush cardtemperaturesensor circuit,voltage out ofrange
Compressor brushcard temperaturesensor harnesswiring: short circuitto ground, shortcircuit to power, highresistanceCompressor brushcard temperaturesensor failureAir 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.
U007388 CAN bus fault,bus off
CAN busconnections shortcircuit to each other Communications Network
U010087
Lostcommunicationwith enginecontrol module(ECM)
CAN bus faultECM disconnectedECM not configuredECM failure
Active stabilizationsystem fault Communications Network
U1A1387
Lostcommunicationwith terrainoptimizationswitch
CAN bus faultTerrain optimizationswitch disconnectedTerrain responsemodule notconfiguredTerrain responsemodule failure
Communications Network
U1A1449CANinitializationfailure
Internal electronicfailure Communications Network
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
Refer to the guided diagnostic routine for this code on theapproved diagnostic system.
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 orconnectorsValve harnesswiring: short circuit Visually inspect the wiring harness and connectors for water
Refer to the guided diagnostic routine for this code on theapproved diagnostic system.
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
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.