Toyota RAV4 manuals

Toyota Sienna Service Manual: Check for intermittent problems

1. CHECK FOR INTERMITTENT PROBLEMS

HINT:

For use of the intelligent tester only: 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 is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.

(a) Clear the DTCs (See page ES-39).

(b) Switch the ECM from normal mode to check mode using an intelligent tester (See page ES-43).

(c) Perform a simulation test (See page IN-35).

(d) Check and wiggle the harness(es), connector(s) and terminal(s) (See page IN-30).

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When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic ...

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