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:

Ignition key cylinder light
ON-VEHICLE INSPECTION 1. KEY CYLINDER LIGHT ASSEMBLY  Connect the battery positive (+) lead to the terminal 1 and the battery negative (-) lead to the terminal 2, and check that the indicator light comes on. 2. TRANSPONDER KEY AMPLIFIER  Inspect key cylinder light o ...

On-vehicle inspection
1. Inspect intake air surge tank assembly (A) inspection procedure when applying voltage between the terminals: (1) Disconnect the connector from the intake air control valve. (2) Apply battery voltage between terminals 1 (-) and 2 (+) of the intake air control valve. Check that a click ...

Reassembly
1. INSTALL REAR SEAT STAY SUB-ASSEMBLY  Install the rear seat stay sub-assembly with the nut. Torque: 5.5 N*m (56 kgf*cm, 49 in.*lbf) 2. INSTALL NO. 2 SEAT CUSHION SPRING ASSEMBLY LH 3. INSTALL LOCUS CABLE LH  Install the locus cable LH with the nut. Torque: 5.5 N*m (56 kg ...

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