Check For Intermittent Problems
NOTE:
Hand-held tester only:
Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect when the ECM is in check mode with a hand held tester. In check mode, the ECM uses 1 trip detection logic, which has a higher sensitivity to malfunctions than normal mode (default) using 2 trip detection logic.
- Clear the DTCs (see DTC CHECK/CLEAR ).
- Switch the hand held tester from normal mode to check mode (see CHECK MODE PROCEDURE ).
- Perform a simulation test (See HOW TO PROCEED WITH TROUBLESHOOTING ).
- Check the connector (s) and terminal (s) (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
- Wiggle the harness (s) and connector (s) (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).