Tech Tips
Intelligent Tester only:
Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with the intelligent tester 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 DTCs Click here.
Check the ECM from normal mode to check mode using the intelligent tester Click here.
Perform a simulation test.
Check the connectors and terminals.
Wiggle the harnesses and connectors.