Retrieving and Clearing DTCs

The diagnosis for the air suspension consists of the Function Test procedure, Auto Test procedure and the Diagnostic Pinpoint Tests. The Function Test and Auto Test procedures require a Rotunda Super Star II Tester, 007-0041A, connected to the diagnostic connector located on the RH front shock absorber tower. During the Auto Test procedure, the Super Star II Tester will display any diagnostic trouble codes stored in the control module. In general, most diagnostic and service actions will contain the following steps:
1. Perform function test 211 to retrieve stored codes.
2. Perform the Auto Test to find current system errors.
3. Service current errors by performing pinpoint tests indicated for the error code.
4. Service codes retrieved by original function test.
5. Perform Auto Test to verify that all concerns have been corrected.

Function Test Procedure

Fig. 3 Function Test Index:

1. Open hood and locate diagnostic connector on front of RH front shock tower. Install battery charger to provide power during testing.
2. Open luggage compartment and ensure air suspension switch is OFF.
3. Set Super Star II Tester mode switch to FAST, set selector switch to EEC/MCU and turn power switch on. Set HOLD/TEST push button in HOLD position, UP.
4. Turn ignition switch to OFF, then ON. Ensure both doors on vehicle are closed.
5. Install Super Star II Tester in diagnostic connector, then press HOLD/TEST button and latch in TEST position, DOWN.
6. Codes for function tests will be displayed one after the other, Fig. 3. To select and run a function test, perform the following steps:
a. When the desired code number appears, release and depress the HOLD/TEST button.
b. Unlatch HOLD/TEST button to end selected test. Relatch button to re-enter code display function.

Auto Test Procedure

Fig. 4 Diagnostic Trouble Codes:

1. Open hood and locate diagnostic connector on front of RH front shock tower. Install battery charger to provide power during testing.
2. Open luggage compartment and ensure air suspension switch is ON.
3. Set Super Star II Tester mode switch to FAST, set selector switch to EEC/MCU and turn power switch on. Set HOLD/TEST push button in HOLD position, UP.
4. Turn ignition switch to OFF, then ON. Ensure both doors on vehicle are closed.
5. Install Super Star II Tester in diagnostic connector, then press HOLD/TEST button and latch in TEST position, DOWN.
6. Code 10 will be displayed while Auto Test is running. Any faults detected will stop the test and be displayed on the Super Star II Tester. Do not lean on vehicle or open doors while code 10 is displayed, as this will introduce false errors into the test.
7. When code 12 is displayed, open driver side door, turn steering wheel 1/4 turn in either direction, then close door.
8. Unlatch HOLD/TEST button.
9. Press HOLD/TEST button and read displayed codes, Fig. 4.