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Inspection Procedure

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  1. CHECK LCD (LIQUID CRYSTAL DISPLAY) FOR LIGHTING 
    1. LCD Illumination Check
      1. Turn the ignition switch ACC.
      2. Turn the radio receiver assembly ON.

      Standard: LCD illumination of the radio receiver assembly light. 

    1. NG: GO to step   7 
    2. OK: GO TO NEXT STEP. 
  2. CONTROL FADER AND ADJUST SOUND BALANCE 
    1. Fader and Balance Adjustment
      1. Operate the radio receiver assembly to adjust the fader and the balance to identify the speaker that does not sound.
        SPEAKER SOUND REFERENCE

        (A) (B)
        A specific speaker does not sound. All speakers do not sound.
    1. B: CHECK AND REPLACE RADIO RECEIVER/ASSY 
    2. A: GO TO NEXT STEP. 
  3. INSPECT FRONT NO.1 SPEAKER ASSY 
    1. Preparation for Check
      1. Disconnect the connector of the speaker.
    2. Resistance Check
      1. Check the resistance between the terminals of the speaker.
        NOTE: The speaker should not be removed for checking.

        Standard value: 4 Ω 

    1. NG: REPLACE FRONT NO.1 SPEAKER ASSY 
    2. OK: GO TO NEXT STEP. 
  4. INSPECT FRONT NO.2 SPEAKER ASSY 
    1. Check that malfunction disappear when a known good speaker is installed.

      Standard: malfunction disappear. 

    HINT:

    Connect the all connectors of speakers.

    1. NG: REPLACE FRONT NO.2 SPEAKER ASSY 
    2. OK: GO TO NEXT STEP. 
  5. INSPECT REAR SPEAKER ASSY 
    1. Preparation for Check
      1. Disconnect the connector of the speaker.
    2. Resistance Check
      1. Check the resistance between the terminals of the speaker.
      NOTE: The speaker should not be removed for checking.

    Standard value: 6 Ω 

    1. NG: REPLACE REAR SPEAKER ASSY 
    2. OK: GO TO NEXT STEP. 
  6. CHECK HARNESS AND CONNECTOR (BETWEEN RADIO RECEIVER ASSY AND SPEAKER) 
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: CHECK AND REPLACE RADIO RECEIVER ASSY 
  7. INSPECT RADIO RECEIVER ASSY (+B, ACC, GND) 
    1. Check that the continuity between terminals at each condition, as shown in the chart.

      Standard: 

      RADIO RECEIVER ASSY CONNECTOR TERMINAL CONTINUITY

      Tester connection Condition Specified condition
      GND-Body ground Constant Continuity
      Fig 1: Identifying Radio Receiver Assy Connector Terminal
      G02861008Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check that the voltage between terminals at each condition, as shown in the chart.

      Standard: 

      RADIO RECEIVER ASSY CONNECTOR TERMINAL VOLTAGE

      Tester connection Condition Specified condition
      +B-GND Constant 10-14 V
      ACC-GND Ignition switch ACC or ON 10-14 V
    1. OK: CHECK AND REPLACE RADIO RECEIVER ASSY 
    2. REPAIR OR REPLACE HARNESS OR CONNECTOR 
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