Check For Intermittent Problems

HINT:

Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect when the hand-held tester is in check mode. In check mode, the hand-held tester uses 1 trip detection logic, which has a higher sensitivity to malfunctions than normal mode (default), which uses 2 trip detection logic.

1. Clear the DTCs (see DTC CHECK/CLEAR  ).
2. Set the check mode (see CHECK MODE PROCEDURE  ).
3. Perform a simulation test.
4. Check the connector and terminal (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
5. Wiggle the harness and the connector (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).