Check For Intermittent Problems

HINT:

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.

1. Clear the DTCs (DTC CHECK/CLEAR  ).
2. Switch the hand-held tester from normal mode to check mode (CHECK MODE PROCEDURE  ).
3. Perform a simulation test.
4. Check the connector(s) and terminal(s).
5. Wiggle the harness(s) and connector(s).