Toyota RAV4 manuals

Toyota Sienna Service Manual: Check and replace ecu

NOTICE: • The connector should not be disconnected from the ECU. Perform the inspection from the backside of the connector on the wire harness side.

• When no measuring condition is specified, perform the inspection with the engine stopped and the ignition switch on.

• Check that the connectors are fully seated. Check for loose, corroded or broken wires.

(a) 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 symptoms occur. If the trouble symptoms disappear, replace the original ECU.

Measure the resistance between the ECU ground terminal and body ground

(1) Measure the resistance between the ECU ground terminal and body ground.

Standard resistance: Below 1 Ω

Disconnect the ECU connector

(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
(a) If the wire harness is ground shorted (Fig. 5), locate the section by conducting a resistance check with the body ground (below).   (b) Check the resistance with the body ground. ...

How to proceed with troubleshooting
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Other materials:

Disassembly
1. REMOVE PROPELLER SHAFT ASSEMBLY (a) Put matchmarks on both the flanges. (b) Remove the 4 nuts, bolts and washers. 2. REMOVE INTERMEDIATE SHAFT (a) Put matchmarks on the propeller shaft subassembly and universal joint flange. NOTICE: Do not use a punch for the marks. (b) Using a ...

No Master/ Connection Check Error
DTC 01-D6 No Master DTC 01-D7 Connection Check Error DESCRIPTION DTC No. DTC Detection Condition Trouble Area 01-D6 *1 When either of the following conditions is met:  The component which has stored the code has (had) been disconnected when the ...

Jam Protection Function Activates During Power Slide Door RH Operation
DESCRIPTION  It may be caused by ill-fitting slide door, faulty touch sensor or faulty pulse sensor.  The power slide door ECU activates the slide motor to open / close the power slide door, thus controlling the power slide door operation. For jam and foreign object detect ...

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