Diagnostic System Check - Automatic Level Control. Buick Rendezvous

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2003 🢒 Rendezvous - AWD 🢒 Suspension 🢒 Automatic Level Control 🢒 Diagnostic System Check - Automatic Level Control

Diagnostic System Check - Automatic Level Control With Inflator

The numbers below refer to the step numbers on the diagnostic table.

The presence of DTCs

The symptom list in Symptoms will determine the correct diagnostic procedure to use.

Step	Action	Yes	No
Schematic Reference: Automatic Level Control Schematics
1	Turn ON the ignition, with the engine OFF. Press the accessory inflator switch for 3 seconds to enter diagnostic mode. After 200 seconds does the LED flash code 12?	Go to Step 2	Go to Step 4
2	Press and release the accessory inflator switch. Does the LED in the Switch stop flashing?	Go to Step 3	--
3	Cycle the ignition switch from ON to OFF. Did you complete the procedure?	System OK	--
4	Does the LED in the accessory inflator switch flash other codes?	Go to Diagnostic Trouble Code (DTC) List	Go to Symptoms - Automatic Level Control