Active Damping Control Module (ADCM)

C211B-92-IGNITION RUN/START INPUT CIRCUIT PERFORMANCE - PERFORMANCE OR INCORRECT OPERATION

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

- When Monitored:
Continuous.

- Set Condition:
The Ignition Status reported on the CAN Bus does not match the state of the Ignition Input.





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

1. VERIFY THE DTC IS ACTIVE

NOTE: This DTC must be active for the results of this test to be valid.

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

Is the DTC active at this time?

Yes

- Go To 2

No

- Go To 5

2. CHECK THE FUSE
1. Ignition on, engine not running.
2. Using a 12-volt test light connected to ground, check the fuse for power.

Is the fuse good?

Yes

- Go To 3

No

- If the related fuse is open, check the (F943) Fused Ignition Switch Output (RUN/START) circuit for a short to ground.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

3. (F943) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT SHORT TO VOLTAGE
1. Turn ignition off to the lock position.
2. Disconnect the ADCM harness connector.
3. With a test light connected to ground check the (F943) Fused Ignition Switch Output (RUN/START) circuit at the ADCM harness connector.

NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the (F943) Fused Ignition Switch Output (RUN/START) circuit for an open or high resistance.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

4. POWER CIRCUITS FOR AN OPEN OR HIGH RESISTANCE
1. Ignition on, engine not running.
2. With a test light connected to ground check (A206) Fused B+ and (F943) Fused Ignition Switch Output (RUN/START) circuits at the ADCM harness connector.

NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes

- Replace the Active Damping Control Module (ADCM). Active Damping Control Module - Removal.
- Perform the ADCM VERIFICATION TEST. Active Damping Control Module (ADCM) Verification Test.

No

- Repair the Power circuits for an open or high resistance.
- Perform the ADCM VERIFICATION TEST. Active Damping Control Module (ADCM) 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 ADCM VERIFICATION TEST. Active Damping Control Module (ADCM) Verification Test.

No

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