Toyota Avalon Service & Repair Manual: Check For Intermittent Problems

CHECK FOR INTERMITTENT PROBLEMS

HINT:

Inspect the vehicle ECM using check mode. Intermittent problems are easier to detect with the Techstream 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.

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2. Change the ECM from normal mode to check mode using the Techstream.

   Click here

3. Perform a simulation test.

   Click here

4. Check and wiggle the harness(es), connector(s) and terminal(s).

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