Inspection Procedure

1. Separate type amplifier:

   Disconnect the connectors shown in the illustration on the left from the stereo component amplifier and speakers.

   Fig 1: Checking Harness And Connector (Separate Type Amplifier)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Built-in type amplifier:

   Disconnect the connectors shown in the illustration on the left from the radio receiver and speakers.

   Fig 2: Checking Harness And Connector (Built-In Type Amplifier)

   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 3: Identifying Front No. 1, And Rear Speaker Connector Front View

   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.

   Fig 4: Identifying Front No. 2 Speaker Connector Front View

   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 5: Measuring Resistance Between Speaker And Body Ground

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Choose type to be inspected.
   VEHICLE TYPE
   
   

   Type	Proceed to
   w/ No. 1 Woofer Box Speaker	A
   w/o No. 1 Woofer Box Speaker	B

B: Go to step  4

A: GO TO NEXT STEP 

1. Resistance check.
2. Measure the resistance according to the value(s) in NO. 1 WOOFER BOX SPEAKER  .
   NOTE: The speaker should not be removed for checking.

   Standard resistance 

   NO. 1 WOOFER BOX SPEAKER
   
   

   Tester connection	Condition	Specified condition
   1 - 3	Always	0.7 to 1.9 Ω
   2 - 4	Always	0.7 to 1.9 Ω

   Fig 6: Inspecting No. 1 Woofer Box Speaker

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE NO. 1 WOOFER BOX SPEAKER 

OK: GO TO NEXT STEP 

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 

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 

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

      Standard resistance: 

      • Separate Type Amplifier: 1.6 to 2.0 Ω 
      • Built-in Type Amplifier: 3.4 to 4.6 Ω 

NG: REPLACE REAR SPEAKER 

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