C212C-11

C212C-11-SUSPENSION VALVE POWER SUPPLY VOLTAGE - CIRCUIT SHORT TO GROUND

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





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

- Set Condition:
When the Air Suspension Control Module (ASCM) detects that too much current is being used when the on-board 12 volt power supply is turned on.





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. (Y30) 12 VOLT VALVE POWER SUPPLY SHORTED TO GROUND




1. Turn the ignition off.
2. Disconnect the ASCM C2 harness connector.
3. Disconnect the Air Suspension Solenoid Assembly harness connector.
4. Measure the resistance between ground and the (Y30) 12 Volt Valve Power Supply circuit.

Is the resistance below 5.0 Ohms?

Yes

- Repair the (Y30) 12 Volt Valve Power Supply circuit for a short to ground.
- Perform the ASCM VERIFICATION TEST. ASCM Verification Test.

No

- Go To 3

3. (Y38) COMPRESSOR RELAY SIGNAL SHORTED TO GROUND




1. Remove the Air Suspension Relay.
2. Measure the resistance between ground and the (Y38) Compressor Relay Signal circuit.

Is the resistance below 5.0 Ohms?

Yes

- Repair the (Y38) Compressor Relay Signal circuit for a short to ground.
- Perform the ASCM VERIFICATION TEST. ASCM Verification Test.

No

- Go To 4

4. (Y47) 12 VOLT REVERSE VALVE SUPPLY SHORTED TO GROUND




1. Disconnect the Air Suspension Compressor Assembly harness connector.
2. Measure the resistance between ground and the (Y47) 12 Volt Reverse Valve Supply circuit.

Is the resistance below 5.0 Ohms?

Yes

- Repair the (Y47) 12 Volt Reverse Valve Supply circuit for a short to ground.
- 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.

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.