Reverse Position Switch Signal Circuit Troubleshooting
Reverse Position Switch Signal Circuit TroubleshootingM/T:
1. Turn the ignition switch ON (II).
Are the back-up lights on when the shift lever is not in the reverse position?
YES - Inspect the reverse position switch.
NO - Go to step 2.
2. Shift the transmission to reverse.
Do the back-up lights come on?
YES - Go to step 3.
NO - Go to step 4.
3. Measure voltage between ECM connector terminal B10 and body ground.
Is there battery voltage?
YES - The reverse position switch signal is OK.
NO - Repair open in the wire between the ECM (B10) and the reverse position switch.
4. Inspect the No.10 METER (7.5A) fuse in the under- dash fuse/relay box.
Is fuse OK?
YES -
- Repair open in the wire between the No.10 (7.5A) fuse and the reverse position switch.
- Inspect the reverse position switch.
NO -
- Repair short in the wire between the No.10 METER (7.5A) fuse and the reverse position switch.
- Repair short in the wire between the ECM (B10) and the reverse position switch.
- Replace the No.10 METER (7.5A) fuse.