U0037-11

U0037-11-LIN BUS - CIRCUIT SHORT TO GROUND





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

- When Monitored:
Continuously when the ignition is on.

- Set Condition:
The module detects a short to ground on the LIN Bus circuit.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. Using a scan tool, record and erase the Diagnostic Trouble Codes (DTCs).
3. Cycle the ignition off and on three times.
4. Operate the front power windows up and down several times.
5. With the scan tool, read the active DTCs.

Does the scan tool display as active: U0037-11-LIN BUS - CIRCUIT SHORT TO GROUND?

Yes

- Go To 2

No

- Stored Lost Communication DTCs and perform the Stored Lost Communication DTCs diagnostic procedure.

2. CHECK THE LIN BUS CIRCUIT




1. Turn the ignition off.
2. Disconnect the Driver Window/Door Lock Switch harness connector.
3. Turn the ignition on.
4. Measure the voltage between the (D903) LIN Bus circuit and the (D501) LIN Bus Return circuit.

Is the voltage below 7.0 Volts?

Yes

- Go To 3

No

- Replace the Driver Window/Door Lock Switch. Power Window Switch - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. (D903) LIN BUS CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Disconnect the Driver Door Module C5 harness connector.
3. Measure the resistance between ground and the (D903) LIN Bus circuit in the Door Module C5 harness connector.

Is the resistance below 10K Ohms?

Yes

- Repair the short to ground in the (D903) LIN Bus circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (D903) LIN BUS CIRCUIT SHORTED TO THE (D501) LIN BUS RETURN CIRCUIT




1. Measure the resistance between the (D903) LIN Bus circuit and the (D501) LIN Bus Return circuit in the Door Module C5 harness connector.

Is the resistance below 10K Ohms?

Yes

- Repair the (D903) LIN Bus circuit for a short to the (D501) LIN Bus Return circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Driver Door Module. Door Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.