Tech Tips
GTS only:
Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with the GTS 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.
Clear the DTC(s) Click here.
Switch the ECM from normal mode to check mode using the GTS Click here.
Perform a simulation test Click here.
Check and wiggle the harness(es), connector(s) and terminal(s) Click here.