DTC Troubleshooting
DTC TROUBLESHOOTING CHART
| Step |
Action |
YES |
NO |
| 1 |
DTC check
- Connect scan tool to DLC with ignition switch turned OFF.
- Check ECM for DTC.
Are there DTC P0116, P0117 or P0118? |
Go to applicable DTC diag. flow. |
Substitute a known-good HVAC control module and recheck. |