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Check for intermittent problems

  • HINT:
     
    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. Connect the intelligent tester to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the tester on.
    4. Clear the DTCs.
    5. Switch the ECM from normal mode to check mode using the intelligent tester.
    6. Perform a simulation test.
    7. Check and wiggle the harness(es), connector(s) and terminal(s).