C15A9

C15A9-00-HEIGHT SENSOR MECHANICAL PERFORMANCE

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

- When Monitored:
With the ignition on.

- Set Condition:
When the Air Suspension Control Module (ASCM) detects that the desired ride height has not been achieved after 20 seconds.





Diagnostic Test

1. VERIFY THE DTC IS ACTIVE

NOTE: If any other DTCs are present, repair them first before continuing with this diagnostic procedure.

1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs.
3. With the scan tool, read the DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

- Go To 5

2. RIDE HEIGHT SENSOR LINKAGE
1. Turn the ignition off to the lock position.
2. Inspect the Ride Height Sensor Linkages for disconnected, damaged, loose or improper mounting.

Were any problems found?

Yes

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

No

- Go To 3

3. RIDE HEIGHT SENSOR
1. Turn the ignition off.
2. Visually inspect the all the ride height sensors for physical or electrical damage.

Were there any problems found?

Yes

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

No

- Go To 4

4. AIR SUSPENSION CONTROL MODULE (ASCM)
1. Replace the Ride Height Sensor. .
2. With the scan tool, read the DTCs in the ASCM.

Does the DTC remain active?

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.