SFI SYSTEM CHECK FOR INTERMITTENT PROBLEMS

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.

1. Clear the DTCs Click here.

2. Check the ECM from normal mode to check mode using the intelligent tester Click here.

3. Perform a simulation test.

4. Check the connectors and terminals.

5. Wiggle the harnesses and connectors.