Inspection Procedure

1. Disconnect the connectors shown in the illustration from the stereo component amplifier or radio receiver and speakers.
   Fig 1: Identifying Stereo Component Amplifier Or Radio Receiver And Speakers Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Premium Model:

   Measure the resistance between each of the front No. 2 speakers and the stereo component amplifier to check for an open circuit in the wire harness.

   Standard resistance: Below 1 Ω 

3. Standard Model:

   Measure the resistance between each of the front No. 2 speakers and the radio receiver to check for an open circuit in the wire harness.

   Standard resistance: Below 1 Ω 

4. Premium Model:

   Measure the resistance between each of the front No. 1 speakers and the stereo component amplifier to check for an open circuit in the wire harness.

   Standard resistance: Below 1 Ω 

5. Standard Model:

   Measure the resistance between each of the front No. 2 speakers and each of the front No. 1 speakers to check for an open circuit in the wire harness.

   Standard resistance: Below 1 Ω 

6. Premium Model:

   Measure the resistance between each of the rear speakers and the stereo component amplifier to check for an open circuit in the wire harness.

   Standard resistance: Below 1 Ω 

7. Standard Model:

   Measure the resistance between each of the rear speakers and the radio receiver to check for an open circuit in the wire harness.

   Standard resistance: Below 1 Ω 

8. 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 2: Identifying Rear Speaker Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go To Next Step 

1. Resistance check.
   1. Measure the resistance between the terminals of the speaker.

      Standard resistance: 

      Premium Model: 1.8 to 2.6 Ω. 

      Standard Model: Approximately 4 Ω 

   NG: REPLACE FRONT NO. 1 SPEAKER 

   OK: Go To Next Step 

1. Check that the malfunction disappears when another speaker in good condition is installed.

   OK: Malfunction disappears. 

   HINT:

• Connect all the connectors to the front No. 2 speaker.
• When there is a possibility that either the right or left front speaker is detective, inspect by interchanging the right one with the left one.
• Perform the above inspection on both LH and RH sides.

OK: REPLACE FRONT NO. 2 SPEAKER 

NG: Go To Next Step 

Result 

B: Go to step   6

A: Go To Next Step 

1. Woofer speaker:
   1. Measure the resistance according to the value(s) in the table below.
      NOTE: The speaker should not be removed for checking.

      Fig 3: Inspecting Rear Speaker

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

   REAR SPEAKER
   
   

   Tester connection	Condition	Specified condition
   2-4	Always	1.8 to 2.6 Ω

2. Tweeter speaker:

1. Check that the malfunction disappears when another rear speaker in good condition is installed.

   OK: Malfunction appears. 

   HINT:

• Connect all the connectors to the rear speaker.
• When there is a possibility that either the right or left rear speaker is detective, inspect by interchanging the right one with the left one.

  NG: REPLACE REAR SPEAKER 

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

1. Resistance check.
   1. Measure the resistance between the terminals of the speaker.

      Standard resistance: Approximately 4 Ω 

      NG: REPLACE REAR SPEAKER 

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