Monitor DTC Status

4WD Control
U0100 Lost Communication With ECM/PCM - Scantool Diagnostics:_:Monitor DTC Status

Monitor DTC Status

1. Connect scantool to Data Link Connector(DLC).
2. Warm up the engine to normal operating temperature.
3. Monitor DTC(Diagnostics Trouble Code) on the scantool.




4. Is the same DTC displayed again?
YES
1) Go to " Inspection/Repair " procedure.
NO
1) Fault is intermittent caused by poor contact in the sensor's and/or "4WD-ECM"s connector or was
repaired and "4WD-ECM" memory was not cleared. Thoroughly check connectors for looseness, poor
connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as
necessary and go to "Verification of vehicle Repair" procedure