Check For Intermittent Problems

HINT: 

Inspect the ECM using check mode. Intermittent problems are easier to detect with the Techstream when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR .
5. Switch the ECM from normal mode to check mode using the Techstream. Refer to CHECK MODE PROCEDURE .
6. Perform a simulation test.
7. Check and wiggle the harness(es), connector(s) and terminal(s).