Inspection Procedure

CHECK HARNESS AND CONNECTOR
1. Separate type amplifier:
  Disconnect the connectors shown in the illustration on the left from the stereo component amplifier and speakers.
2. Built-in type amplifier:
  Disconnect the connectors shown in the illustration on the left from the radio receiver and speakers.
  
  Fig 1: Disconnecting Connectors From Stereo Component Amplifier And Speakers
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Separate type amplifier:
  Measure the resistance between each speaker and the stereo component amplifier to check for an open circuit in the wire harness.
  
  Standard resistance: Below 1 Ω
  
  Fig 2: Identifying Front No.1 Speaker Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Built-in type amplifier:
  Measure the resistance between each speaker and the radio receiver to check for an open circuit in the wire harness.
  
  Standard resistance: Below 1 Ω
  
  Fig 3: Identifying Front No.2 Speaker Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Measure the resistance between each speaker and body ground to check for a short circuit in the wire harness.
  Standard resistance: 10 kΩ or higher
  
  Fig 4: Identifying Rear Speaker Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
  
  OK: GO TO NEXT STEP.
INSPECT FRONT NO. 1 SPEAKER
1. Resistance check.
  1. Measure the resistance between the terminals of the speaker.
    Standard resistance:
    
    Separate Type Amplifier: 2.3 to 2.9 Ω
    
    Built-in Type Amplifier: 3.4 to 4.6 Ω
    
    NG: REPLACE FRONT NO. 1 SPEAKER
    
    OK: GO TO NEXT STEP.
INSPECT FRONT NO. 2 SPEAKER
1. Check that malfunction disappears when another speaker in good condition is installed.
  OK: Malfunction disappears.
  
  HINT:
  - Connect all the connectors to the speakers.
  - When there is a possibility that either right or left front speaker is detective, inspect by interchanging the right one and the left one.
  OK REPLACE FRONT NO. 2 SPEAKER
  
  NG: GO TO NEXT STEP.
INSPECT REAR SPEAKER
1. Resistance check.
  1. Measure the resistance between the terminals of the speaker.
    Standard resistance:
    
    Separate Type Amplifier: 1.75 to 2.75 Ω
    
    Built-in Type Amplifier:
    
    5.1 to 6.9 Ω
    
    NG: REPLACE REAR SPEAKER
    
    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE