B212E-11

B212E-11-IGNITION RUN/ACC CONTROL - CIRCUIT SHORT TO GROUND

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





Theory of Operation

The Body Control Module (BCM) receives the network communication message from the Radio Frequency (RF) Hub indicating run or accessory operation is requested. The BCM provides a voltage output through the accessory delay relay control circuit, which connects to the coil side of the Run/Acc 1 Relay.

- When Monitored:
With the Ignition Run/Acc Relay active.

- Set Condition:
When the Body Control Module (BCM) detects a low condition on the Accessory Delay Relay Control circuit.





Diagnostic Test

1. CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

2. CHECK THE RUN/ACC 1 RELAY FOR CORRECT OPERATION
1. Turn the ignition off.
2. Remove the Run/Acc 1 Relay and substitute it with a known good relay.
3. Turn the ignition on.
4. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 3

No

- Replace the Run/Acc 1 Relay.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

3. CHECK THE (P305) ACCESSORY DELAY RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Remove the Run/Acc 1 Relay.
3. Disconnect the BCM E harness connector.
4. Measure the resistance between ground and the (P305) Accessory Delay Relay circuit.

Is the resistance above 10k Ohms?

Yes

- Replace the Body Control Module (BCM). Body Control Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test .

No

- Repair the short to ground in the (P305) Accessory Delay Relay circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test .