C159F-13

C159F-13-AIR SUSPENSION REVERSE VALVE 1 CONTROL - CIRCUIT OPEN

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





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

- Set Condition:
The Air Suspension Control Module (ASCM) detects the reverse valve 1 control has an open or high resistance while ignition is in the Run position.





Diagnostic Test

1. VERIFY THE 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 active at this time?

Yes

- Go To 2

No

- Go To 6

2. AIR SUSPENSION COMPRESSOR ASSEMBLY HARNESS CONNECTOR

NOTE: Make sure the Air Suspension Compressor Assembly harness connector is connected correctly.

1. Turn the ignition off.
2. Inspect the Air Suspension Compressor Assembly harness connector for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.

Were any problems found?

Yes

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

No

- Go To 3

3. (Y47) 12 VOLT REVERSE VALVE SUPPLY OPEN OR HIGH RESISTANCE




1. Disconnect the Air Suspension Compressor Assembly harness connector.
2. Disconnect the ASCM C2 harness connector
3. Measure the resistance of the (Y47) 12 Volt reverse Supply circuit between the ASCM C2 harness connector and the Air Suspension Compressor Assembly harness connector.

Is the resistance above 5.0 Ohms?

Yes

- Repair the (Y47) 12 Volt Reverse Supply circuit for an open or high resistance.
- Perform the ASCM VERIFICATION TEST. ASCM Verification Test.

No

- Go To 4

4. (Y48) REVERSE VALVE CONTROL 1 OPEN OR HIGH RESISTANCE




1. Measure the resistance of the (Y48) Reverse Valve Control 1 circuit between the ASCM C2 harness connector and the Air Suspension Compressor Assembly harness connector.

Is the resistance above 5.0 Ohms?

Yes

- Repair the (Y48) Reverse Valve Control 1 circuit for an open or high resistance.
- Perform the ASCM VERIFICATION TEST. ASCM Verification Test.

No

- Go To 5

5. AIR SUSPENSION COMPRESSOR ASSEMBLY




1. Connect the Air Suspension Compressor Assembly harness connector.
2. Measure the resistance between the (Y47) 12 Volt reverse Supply circuit and the (Y48) Reverse Valve Control 1 circuit at the ASCM C2 harness connector.

Is the resistance above 10.0 Ohms?

Yes

- Replace the Air Suspension Compressor Assembly. Air Suspension Compressor Assembly - Removal.
- Perform the ASCM VERIFICATION TEST. ASCM Verification Test.

No

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

6. 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.