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. 1
   Clear the DTCs (See page ).
2. 2
   Switch the ECM from normal mode to check mode using the Techstream (See page ).
3. 3
   Perform a simulation test.
4. 4
   Check and wiggle the harness(es), connector(s) and terminal(s).