Toyota RAV4 manuals

Toyota RAV4 Service Manual: Check and replace ecu

Notice:

Toyota RAV4. Check and replace ecu


  1. First, check the ecu ground circuit. If it is faulty, repair it. If it is normal, the ecu could be faulty.

    Temporarily replace the ecu with a normally functioning one and check if the problem symptoms occur. If the problem symptoms disappear, replace the original ecu.

  1. Measure the resistance between the ecu ground terminal and body ground.

    Standard resistance: Below 1 ù

  2. Disconnect the ecu connector. Check the ground terminal on the ecu side and wire harness side for bending, corrosion or foreign matter. Lastly, check the contact pressure of the female terminals.
Check for short circuit
If the wire harness is ground shorted (fig. 5), Locate the section by conducting a resistance check with the body ground (below). Check the resistance with the body ground. Disconne ...

Terms
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Other materials:

Power supply relay failure
Description If the power steering ecu detects these dtcs, it shuts off the motor relay circuit (built into the power steering ecu) and stops power assist. Inspection procedure Reconfirm dtc Check for dtc. Ok: dtc is not output. Replace power steering ecu ...

Low pitched horn
Components Removal Remove radiator support opening cover (see page et-4) Remove front fender liner lh (see page et-4) Remove front fender liner rh (see page et-4) Remove front bumper cover (see page et-5) Remove low pitched horn Disconnect the horn connector. Remove th ...

Random / multiple cylinder misfire detected
Description When the engine misfires, high concentrations of hydrocarbons (hc) enter the exhaust gas. Extremely high hc concentration levels can cause increases in exhaust emission levels. High concentrations of hc can also cause increases in the three-way catalytic converter (twc) te ...

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