B2143
B2143-11-UGDO ENABLE CONTROL - CIRCUIT SHORT TO GROUND
For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
The Body Control Module (BCM) provides voltage to the Universal Garage Door Opener (UGDO) located in the Electronic Overhead Module (EOM). When the anti-theft alarm is active, the BCM disables the power feed to the UGDO. For additional information, Universal Transmitter - Description.
- When Monitored:
UGDO enable is active
- Set Condition:
The Body Control Module detects a low condition on the (G38) UGDO Enable Control circuit for more than two minutes.
1. CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (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. ATTEMPT TO CLEAR THE DTC
1. Turn the ignition off.
2. Disconnect the Electronic Overhead Module (EOM) harness connector.
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 Electronic Overhead Module (EOM). Overhead Console - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
3. CHECK THE (G38) UGDO ENABLE CONTROL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the BCM G harness connector.
3. Measure the resistance between ground and the (G38) UGDO Enable Control 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 (G38) UGDO Enable Control circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.