DTC P0957 Backup Light Relay Circuit Low: Wiring Diagram
WARNING: This page is about a different variant/trim than selected.
DIAGNOSIS PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK DTC OF TCM. | Is DTC of Transmission Range Sensor Circuit (PRNDL Input) detected? | Perform the diagnosis according to DTC. | Go to step 2 . |
2 CHECK HARNESS CONNECTOR BETWEEN TCM AND BACK-UP LIGHT RELAY.
|
Is the resistance less than 1 Ω? | Go to step 3 . | Repair the open circuit of harness or poor contact of connector between TCM connector and transmission connector. |
| 3 CHECK HARNESS CONNECTOR BETWEEN TCM AND TRANSMISSION. Measure the resistance of harness between TCM connector and chassis ground. Connector & terminal (B54) No. 13 - Chassis ground: |
Is the resistance 1 MΩ or more? | Go to step 4 . | Repair the short circuit of harness between TCM connector and transmission connector. |
4 CHECK OUTPUT SIGNAL OF TCM.
|
Is the voltage 8 V or more? | Go to step 5 . | Replace the TCM. Ref. to TRANSMISSION CONTROL MODULE (TCM) . |
5 CHECK OUTPUT SIGNAL OF TCM.
|
Is the voltage 1 V or less? | Go to step 6 . | Replace the TCM. Ref. to TRANSMISSION CONTROL MODULE (TCM) . |
| 6 CHECK INPUT VOLTAGE FOR BACK-UP LIGHT RELAY. Measure the voltage between back-up light relay and chassis ground. |
Is the voltage 10 - 13 V? | Replace the backup light relay. | Check open or short circuit of harness between fuse (No. 18) and backup light relay. |