Monitor DTC Status

Monitor DTC Status

CAUTION: If any DTCs relating to OTS (Oil Temperature Sensor) or ECT (Engine Coolant Temperature)Sensor are stored, do ALL REPAIRS associated with those codes before proceeding with this troubleshooting tree.

1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode
2. Press F4 (DTAL) to select DTC information from the DTCs menu.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions
4. Read "DTC Status" parameter




5. Is parameter displayed "History (Not Present) fault" ?

CAUTION:
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.

YES
1) Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
1) Go to next step as below

Monitor Scantool Data

1. Allow the engine to cool.
2. Run the cold engine at idle for 5 minutes.
3. Check the engine coolant temperature parameter at idle with the scantool.
4. Is the engine coolant temperature increase to above 50 °C (122 °F)




YES
1) Go to next step as below
NO
1) Check ECTS for contamination, deterioration, poor connection or damaged harness. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure