Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the air suspension control module	CJB Fuse 5 (15A). BJB Fuse 8 (30A). Circuitry. Air suspension control module.	Go To PINPOINT TEST A .
Unable to enter auto test	Air suspension control module. Circuitry.	Go To PINPOINT TEST B .
Rear air suspension does not respond to load changes	Circuitry. Air compressor. Air compressor inlet tube. Air compressor drier. Air suspension height sensor. Air suspension control module.	Go To PINPOINT TEST C .
Rear rides low/high	Circuitry. Air spring solenoid. Air suspension height sensor. Air suspension control module.	Go To PINPOINT TEST C .
Poor ride quality	Circuitry. Air springs.	Go To PINPOINT TEST C .
Air suspension warning indicator ON	Air suspension switch OFF.	Place the air suspension switch in the ON position.
	Air suspension control module. Circuitry.	GO to Auto Test.
	Instrument cluster (conventional cluster) or lamp warning module (electronic cluster).	REFER to INSTRUMENT CLUSTER - CONVENTIONAL (conventional cluster) or REFER to INSTRUMENT CLUSTER - ELECTRONIC (electronic cluster), or REFER to INSTRUMENT CLUSTER - NATURAL GAS VEHICLE (natural gas cluster).