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Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT FUSE (ECU-B2) 
    1. Remove the ECU-B2 fuse from the engine room No. 2 relay block.
    2. Measure the resistance of the fuse.

      Standard resistance: 

      Below 1 Ω 

    NG: REPLACE FUSE 

    OK: Go to next step 

  2. CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BATTERY) 
    1. Disconnect the E37 amplifier connector.
      Fig 1: Identifying E37 Connector Terminals
      G05585259Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Specified Condition
      E37-21 (B) - Body ground 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  3. CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BODY GROUND) 
    1. Disconnect the E37 amplifier connector.
      Fig 2: Identifying E37 Connector Terminals
      G05585260Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      E37-14 (GND) - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

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