DOOR UNLOCK RELAY CONTROL CIRCUIT SHORT TO VOLTAGE
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
With ignition on.
- Set Condition:
The BCM detects a high circuit on the Door Lock Relay Control circuit when it is attempting to lock the doors for more than 5 seconds. If the BCM is not able to ground its side of the relay coil, the control circuit remains high.
| Possible Causes |
| RELAY SHORTED |
| JUNCTION BLOCK - DOOR UNLOCK RELAY CONTROL SHORT TO VOLTAGE |
| BODY CONTROL MODULE - SHORTED |
Diagnostic Test
1. CHECK TROUBLE CODENOTE: If the door locks are totally inoperative, check fuse No. 6 before proceeding.
Turn the ignition on.
With the scan tool, erase DTCs.
Operate the door locks several times.
With the scan tool, read DTCs.
Does the scan tool display DOOR UNLOCK RELAY CONTROL CIRCUIT SHORT TO VOLTAGE?
Yes
- Go To2
No
- Problem is intermittent and not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors and repair as necessary.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
2. CHECK FOR SHORTED RELAY
Turn the ignition off.
Remove the Door Unlock Relay from the Junction Block.
Install a substitute relay in place of the Door Unlock Relay.
Turn the ignition on.
With the scan tool, erase DTCs.
Operate the Door Locks several times.
With the scan tool, read DTCs.
Does the scan tool display DOOR UNLOCK RELAY CONTROL CIRCUIT SHORT TO VOLTAGE?
Yes
- Go To3
No
- Replace the original relay.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
3. CHECK THE JUNCTION BLOCK FOR THE DOOR UNLOCK RELAY CONTROL CIRCUIT SHORT TO VOLTAGE
Turn the ignition off.
Remove the Door Unlock Relay from the Junction Block.
Remove the Body Control Module from the Junction Block.
NOTE: Ensure the Junction Block connectors are reconnected at this time.
Turn the ignition on.
Measure the voltage between ground and the (P334) Door Unlock Relay Control circuit in the relay connector of the Junction Block.
Is there any voltage present?
Yes
- Replace the Junction Block in accordance with service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Replace the Junction Block.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)