DTC Troubleshooting
DTC TROUBLESHOOTING CHART
| Step | Action | Value (s) | Yes | No |
|---|---|---|---|---|
| 1 | Perform an ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK
. Is the system check complete? |
- | Go to Step 2. | Go to ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK . |
| 2 |
Does the voltage the specified value? |
0 V | Go to Step 4. | Go to Step 3. |
| 3 | Repair for a short to battery in the wire between the relay connector terminal 86 and the ECM connector terminal A51. Is the repair complete? |
- | Go to Step 16. | - |
| 4 | Measure the resistance between the relay terminal 85 and 86. Does the resistance measure the specified value? |
0 Ω | Go to Step 5. | Go to Step 6. |
| 5 | Replace the High speed cooling fan relay. Is the replacement complete? |
- | Go to Step 16. | - |
| 6 |
Does the resistance the specified value? |
0 Ω | Go to Step 7. | Go to Step 8. |
| 7 | Replace the cooling fan control relay. Is the replacement complete? |
- | Go to Step 16. | - |
| 8 | Check for an open or a short to ground in the wire between the high speed cooling fan relay connector terminal 86 and the ECM connector terminal A51. Is the problem found? |
- | Go to Step 10. | Go to Step 9. |
| 9 | Repair for a open or a short to ground in the wire between the cooling fan control relay connector terminal 86 and the ECM connector terminal A51. Is the repair complete? |
- | Go to Step 10. | Go to Step 11. |
| 10 | Repair for a open or a short to ground in the wire. Is the repair complete? |
- | Go to Step 16. | - |
| 11 | Connect the test light between the high speed cooling fan relay connector terminal 30 and ground. Is the test light illuminate? |
- | Go to Step 12. | Go to Step 13. |
| 12 | Check for a poor or faulty connection at the ECM connector. Is the problem found? |
- | Go to Step 14. | Go to Step 13. |
| 13 | Check for a poor or faulty connection between the relay connector terminal 30 and battery negative. Is the problem found? |
- | Go to Step 14. | Go to Step 15. |
| 14 | Repair the connection as needed. Is the repair complete? |
- | Go to Step 16. | - |
| 15 | Replace the ECM. Is the replacement complete? |
- | Go to Step 17. | - |
| 16 |
Does the scan tool indicate that this diagnostic ran and passed? |
- | Go to Step 16. | Go to Step 2. |
| 17 | Check if any additional DTCs are set. Are any DTCs displayed that have not been diagnosed? |
- | Go to applicable DTC Table . | System OK |