| BACKUP LAMP DOES NOT ILLUMINATE |
1. Ineffective or missing bulb. |
1. Test and replace backup lamp bulb if required. |
| 2. Ineffective ground circuit. |
2. Test and repair open backup lamp ground circuit if required. |
| 3. Ineffective feed circuit. |
3. Test and repair open backup lamp feed circuit if required. |
| 4. Ineffective switch. |
4. Test and replace backup lamp switch (manual transmission) or TRS (automatic transmission) if required. |
| 5. Ineffective TIPM inputs or outputs. |
5. Use a diagnostic scan tool to test the TIPM inputs and outputs. Refer to the appropriate diagnostic information. |
| BACKUP LAMP DOES NOT EXTINGUISH |
1. Ineffective feed circuit. |
1. Test and repair shorted backup lamp feed circuit if required. |
| 2. Ineffective switch. |
2. Test and replace backup lamp switch (manual transmission) or transmission range sensor (automatic transmission) if required. |
| 3. Ineffective TIPM inputs or outputs. |
3. Use a diagnostic scan tool to test the TIPM inputs and outputs. Refer to the appropriate diagnostic information. |