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Inspection Procedure

  1. INSPECT RADIO RECEIVER 
    1. Disconnect the radio receiver connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      E41-3 (MACC) - Body ground Ignition switch ON 4 to 6 V
      E41-1 (SNS2) - Body ground Ignition switch ON 4 to 6 V
      Fig 1: Identifying E41 Radio Receiver Connector
      G06035738Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPLACE RADIO RECEIVER  (See REMOVAL  )

      OK: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (MICROPHONE - RADIO RECEIVER) 
    1. Disconnect the microphone connector and the radio receiver connector.
      Fig 2: Identifying E41 Radio Receiver Connector
      G06035739Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance: 

      w/ Sliding Roof 

      RESISTANCE SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      O4-9 (SNS2) - E41-1 (SNS2) Always Below 1 Ω
      O4-11 (MI1+) - E41-2 (MIC+) Always Below 1 Ω
      O4-10 (MIC-) - E41-5 (MIC-) Always Below 1 Ω
      O4-12 (ACC) - E41-3 (MACC) Always Below 1 Ω
      O4-9 (SNS2) - Body ground Always 10 kΩ or higher
      O4-11 (MI1+) - Body ground Always 10 kΩ or higher
      O4-10 (MIC-) - Body ground Always 10 kΩ or higher
      O4-12 (ACC) - Body ground Always 10 kΩ or higher

      w/o Sliding Roof 

      RESISTANCE SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      O7-3 (SNS2) - E41-1 (SNS2) Always Below 1 Ω
      O7-2 (M(C+) - E41-2 (MIC+) Always Below 1 Ω
      O7-4 (MIC-) - E41-5 (MIC-) Always Below 1 Ω
      O7-1 (MACC) - E41-3 (MACC) Always Below 1 Ω
      O7-3 (SNS2) - Body ground Always 10 kΩ or higher
      O7-2 (MIC+) - Body ground Always 10 kΩ or higher
      O7-4 (MIC-) - Body ground Always 10 kΩ or higher
      O7-1 (MACC) - Body ground Always 10 kΩ or higher
      Fig 3: Identifying O7 And O4 Microphone Connectors
      G06035740Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

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