Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with an intelligent tester when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which has a higher sensitivity to malfunctions than normal mode (default), which uses 2 trip detection logic.
(a) Clear the DTCs (Click here). (b) Change the ECM from normal mode to check mode using the intelligent tester (Click here). (c) Perform a simulation test (Click here). (d) Check the connectors and terminal (Click here). (e) Wiggle the harnesses and connectors (Click here).
