Diagnosis And Testing - Fog Lamp
FOG LAMP DIAGNOSIS
| CONDITION | POSSIBLE CAUSES | CORRECTION |
|---|---|---|
| FRONT FOG LAMP DOES NOT ILLUMINATE | 1. Ineffective or missing bulb. | 1. Test and replace front fog lamp bulb as required. |
| 2. Ineffective ground circuit. | 2. Test and repair front fog lamp ground circuit as required. | |
| 3. Ineffective feed circuit. | 3. Test and repair open front fog lamp feed circuit as required. | |
| 4. Ineffective switch. | 4. Test and replace headlamp switch as required. Check TIPM for DTC's. | |
| 5. Ineffective instrument cluster inputs or outputs. | 5. Use a diagnostic scan tool to test the instrument cluster inputs and outputs as required. Refer to the appropriate diagnostic information. | |
| 6. Ineffective TIPM inputs or outputs. | 6. Use a diagnostic scan tool to test the TIPM inputs and outputs as required. Refer to the appropriate diagnostic information. Check TIPM for DTC's. | |
| 7. Ineffective CCN inputs or outputs. | 7. Use a diagnostic scan tool to test the TIPM inputs and outputs as required. Refer to the appropriate diagnostic information. Check TIPM for DTC's. | |
| 8. Ineffective SCCM outputs. | 8. Use diagnostic scan tool to diagnose LIN data bus. Refer to the appropriate diagnostic information. Check CCN for DTC's. | |
| FRONT FOG LAMP DOES NOT EXTINGUISH. | 1. Ineffective feed circuit. | 1. Test and repair shorted front fog lamp feed circuit as required. |
| 2. Ineffective switch. | 2. Test and replace headlamp switch as required. | |
| 3. Ineffective CCN inputs or outputs. | 3. Use a diagnostic scan tool to test the instrument cluster inputs and outputs as required. Refer to the appropriate diagnostic information. | |
| 4. Ineffective TIPM inputs or outputs. | 4. Use a diagnostic scan tool to test the TIPM inputs and outputs as required. Refer to the appropriate diagnostic information. | |
| 5. Ineffective SCCM outputs. | 5. Use diagnostic scan tool to diagnose LIN data bus. Refer to the appropriate diagnostic information. Check CCN for DTC's. |