C15A8

C15A8-2A-AIR SUSPENSION DOWN BUTTON - STUCK

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Ignition on. Battery voltage between 9 and 16 volts.

- Set Condition:
Air suspension UP selection button (located next to and is part of the Terrain switch) has been pressed continuously for more than 17 seconds while the ignition is in the Run position.





Diagnostic Test

1. DTC IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. With the scan tool, read the DTCs in the ASCM.

Is the DTC status Active at this time?

Yes

- Go To 2

No

- Go To 5

2. DOWN AIR SUSPENSION SWITCH IN THE PRESSED POSITION
1. Turn the ignition off.
2. Inspect the DOWN Air Suspension switch for foreign material which could keep it from returning back to the not pushed state.
3. Turn the ignition on.
4. Using the scan tool, monitor the DOWN Air Suspension Switch status in the ASCM while pressing and releasing the switch.

Does the DOWN Air Suspension Switch function correctly?

Yes

- Test complete, the condition or conditions that originally set this DTC are not present at this time.

No

- Go To 3

3. TERRAIN SWITCH
1. Turn the ignition off.
2. Replace the Terrain Switch. Perform the ASCM VERIFICATION TEST. ASCM Verification Test.
3. Turn the ignition on.
4. With the scan tool, record and erase DTCs.
5. With the scan tool, read the DTCs in the ASCM.

Is the DTC status still Active at this time?

Yes

- Go To 4

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time.
- Replace the Terrain Switch.
- Perform the ASCM VERIFICATION TEST. ASCM Verification Test.

4. INSTRUMENT CLUSTER
1. Turn the ignition off.
2. Replace the Instrument Cluster. Instrument Cluster - Removal.
3. Turn the ignition on.
4. With the scan tool, record and erase DTCs.
5. With the scan tool, read the DTCs in the ASCM.

Is the DTC status still Active at this time?

Yes

- Replace the Air Suspension Control Module (ASCM). Air Suspension Control Module - Removal.
- Perform the ASCM VERIFICATION TEST. ASCM Verification Test.

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time.

5. INTERMITTENT WIRING AND CONNECTORS
1. Using the wiring diagram/schematic as a guide, inspect the wiring harness and connectors.
2. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
3. Look for the data to change or for the DTC to reset during the wiggle test.
4. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times.
5. Look for the data to change other than as expected or for the DTC to reset.

Were any problems found?

Yes

- Repair as necessary.
- Perform the ASCM VERIFICATION TEST. ASCM Verification Test.

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time.