Toyota RAV4 manuals

Toyota Sienna Service Manual: Check for intermittent problems



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).

How to proceed with troubleshooting
HINT: The intelligent tester can be used in steps 2, 3, 4, 6 and 9. 1 VEHICLE BROUGHT TO WORKSHOP 2 CONNECT INTELLIGENT TESTER TO DLC3 HINT: If the display indicates a communication fault in th ...

Basic inspection
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 ...

Other materials:

Data list / active test
HINT: By accessing the DATA LIST displayed by the intelligent tester, you can perform such functions as reading the values of switches and sensors without removing any parts. Reading the DATA LIST as the first step in troubleshooting is one method to shorten labor time. 1. DATA LIST FOR OCCUPA ...

ABS Warning Light Remains ON
DESCRIPTION If any of the following is detected, the ABS warning light remains on. The skid control ECU connectors are disconnected from the skid control ECU. There is a malfunction in the skid control ECU internal circuit. There is an open in the harness between the combination meter an ...

Short to GND in Side Squib RH Circuit
DTC B0112/41 Short to GND in Side Squib RH Circuit DESCRIPTION The side squib RH circuit consists of the center airbag sensor assembly and the front seat side airbag assembly RH. The circuit instructs the SRS to deploy when deployment conditions are met. DTC B0112/41 is recorded when a sh ...

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