Toyota RAV4 manuals

Toyota Sienna Service Manual: General information

A large number of ECU controlled systems are used in the SIENNA. In general, ECU controlled systems are considered to be very intricate, requiring a high level of technical knowledge to troubleshoot. However, most problem checking procedures only involve inspecting the ECU controlled system's circuits one by one. An adequate understanding of the system and a basic knowledge of electricity is enough to perform effective troubleshooting, accurate diagnoses and necessary repairs.

FOR USING INTELLIGENT TESTER

(1)If communication is normal when the tester is connected to another vehicle, inspect the diagnosis data link line (Bus (+) line) or ECU power circuit of the vehicle.

(2)If communication is still not possible when the tester is connected to another vehicle, the problem is probably in the tester itself. Perform the Self Test procedures outlined in the tester operator's manual.

How to troubleshoot ecu controlled systems
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Electronic circuit inspection procedure
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Other materials:

Installation
1. INSTALL FRONT AXLE ASSEMBLY LH (a) Install the 2 bolts, nuts and front axle assembly LH with the 2 bolts and nuts to the shock absorber assembly front LH. Torque: 230 N*m (2,350 kgf*cm, 170 ft.*lbf) NOTICE: Only when reusing the bolts and nuts, apply the small amount of engine oil ...

Gateway ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Gateway ECU Communication Stop Mode "Gateway" is not displayed on the "Communication Bus Check" screen of the intelligent tester Applies to "Gateway ECU Communication ...

Steering Pad Switch Circuit
DESCRIPTION This circuit sends an operation signal from the steering pad switch to the radio receiver. If there is an open in the circuit, the navigation system cannot be operated using the steering pad switch. If there is a short in the circuit, the resulting condition is the same as if ...

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