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:

VIN not Programmed or Mismatch - ECM / PCM
DESCRIPTION DTC P0630 is set when the Vehicle Identification Number (VIN) is not stored in the Engine Control Module (ECM) or the input VIN is not accurate. Input the VIN with the intelligent tester. MONITOR STRATEGY TYPICAL ENABLING CONDITIONS TYPICAL MALFUNCTION THRESHOLDS ...

Removal
1. REMOVE INSTRUMENT PANEL SAFETY PAD SUBASSEMBLY 2. REMOVE ANTENNA CORD SUB-ASSEMBLY  Replace the 5 clamps and remove the antenna cord sub-assembly. 3. REMOVE PULL TOP ANTENNA POLE SUBASSEMBLY 4. REMOVE ANTENNA ORNAMENT Remove the antenna ornament. 5. REMOVE ANTENNA ASS ...

ABS Warning Light does not Come ON
WIRING DIAGRAM Refer to ABS Warning Light Remains ON (See page BC-141). INSPECTION PROCEDURE 1 CHECK ABS WARNING LIGHT (a) Disconnect the skid control ECU connector. (b) Turn the ignition switch to the ON position. (c) Check that the ABS warning light comes on. OK: ABS warning light come ...

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