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 Air suspension control module failure	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 policy and procedures manual if a module is suspect.
Vehicle does not sit level	Suspension fault	Two chimes repeated regularly Red indicator permanently illuminated	Water ingress to wiring harness or connectors Air leak(s) Calibration corrupt cross-link valve fault Height sensor fault Reservoir valve stuck open Exhaust valve stuck closed Corner valves stuck open Air suspension control module failure	Visually inspect the wiring harness and connectors for water ingress. Visually inspect the system for air leakage and refer to the guided diagnostic routine on the approved diagnostic system. Check the system calibration using the approved diagnostic system. For front and rear cross link valve tests refer to the guided diagnostic routine on the approved diagnostic system. Check for height sensor DTCs and refer to the DTC index. For reservoir and exhaust valve tests refer to the guided diagnostic routine on the approved diagnostic system. Check for corner valve DTCs and refer to the DTC index. Refer to the warranty policy and procedures manual if a module is suspect.
Vehicle sits too low	Suspension fault Hill descent control (HDC) fault, system not available Dynamic stability control (DSC)	Two chimes, amber indicator permanently illuminated One chime DSC amber indicator permanently illuminated ABS indicator permanently illuminated	Water ingress to wiring harness or connectors Air leak(s) Air suspension compressor temperature sensor fault Inlet air filter blockage/restriction Air suspension compressor fault Exhaust valve stuck/sticking Air suspension control module lost communication with ABS module ABS fault. Air suspension control module failure	Visually inspect the wiring harness and connectors for water ingress. Visually inspect the system for air leakage. For air compressor temperature sensor, inlet air filter, exhaust valve and air compressor tests refer to the guided diagnostic routine on the approved diagnostic system. For Air suspension control module lost communication with ABS module, refer to the lost communication codes statement at the end of this table. Check for ABS DTCs, Refer to the relevant section of the workshop manual. Refer to the warranty policy and procedures manual if a module is suspect.
Vehicle sits too high	Suspension fault	Two chimes, amber indicator permanently illuminated	Reservoir valve stuck open Exhaust valve stuck closed Corner valves stuck open Air suspension control module failure	For reservoir valve and exhaust valve tests refer to the guided diagnostic routine on the approved diagnostic system. Check for corner valve DTCs and refer to the DTC index. Refer to the warranty policy and procedures manual if a module is suspect.
System detects extended mode unnecessarily when lowering	-	-	Crossed gallery and air spring pipes Incorrect valve block installed to front or rear Damage or blockage in air harness	Refer to the guided diagnostic routine on the approved diagnostic system.
Vehicle leans/tilts after being left over-night or for some days	-	-	Leaking air spring(s) Leak from corner valve to gallery Exhaust valve stuck open	Refer to the guided diagnostic routine on the approved diagnostic system.
After vehicle left over-night or for some days system regularly indicates "Suspension vehicle raising slowly" when first driving off	Suspension vehicle raising slowly	-	Leaking air spring(s) Leaking reservoir	Refer to the guided diagnostic routine on the approved diagnostic system.