Inspection Procedure

CHECK HARNESS AND CONNECTOR
1. Disconnect the connectors shown in the illustration from the stereo component amplifier or radio receiver and speakers.
2. 10 Speaker System:
  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. 6 speaker System:
  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. 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
5. 10 Speaker System:
  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
6. 6 Speaker System:
  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
7. 10 Speaker System:
  Measure the resistance between each of the rear stereo component speakers and the stereo component amplifier to check for an open circuit in the wire harness.
  
  Standard resistance:
  
  Below 1 Ω
8. 10 Speaker System:
  Measure the resistance between the front stereo component speaker and the stereo component amplifier to check for an open circuit in the wire harness.
  
  Standard resistance:
  
  Below 1 Ω
  
  Fig 1: Identifying Speaker System Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. 10 Speaker System:
  Measure the resistance between the woofer box speaker and the stereo component amplifier to check for an open circuit in the wire harness.
  
  Standard resistance:
  
  Below 1 Ω
10. Measure the resistance between the each speaker and body ground to check for a short circuit in the wire harness.
  Standard resistance:
  
  10 kΩ or higher
  
  Fig 2: Identifying W3 Woofer Box Speaker Connector Terminal
  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:
    
    10 Speaker System:
    
    4 to 6 Ω
    
    6 Speaker System:
    
    Approximately 4 Ω
NG: REPLACE FRONT NO. 1 SPEAKER

OK: Go to Next Step
INSPECT REAR SPEAKER
1. Resistance check.
  1. Measure the resistance between the terminals of the speaker.
    10 Speaker System:
    
    Approximately 2.4 Ω
    
    6 Speaker System:
    
    Approximately 4 Ω
NG: REPLACE REAR SPEAKER

OK: Go to Next Step
INSPECT FRONT NO. 2 SPEAKER
1. Check that the malfunction disappears when another speaker in good condition is installed.
  Standard:
  
  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

CONFIRM MODEL

Result

RESULT CHART

Result	Proceed to
10 Speaker System	A
6 Speaker System	B

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

A: Go to Next Step

INSPECT WOOFER BOX SPEAKER

Resistance check.

Measure the resistance according to the value(s) in the table below.

NOTE: The speaker should not be removed for checking.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester connection	Condition	Specified condition
1-3	Always	Approximately 1.2 Ω
2-4	Always	Approximately 1.2 Ω

Fig 3: Identifying Woofer Box Speaker Connector Terminals

NG: REPLACE WOOFER BOX SPEAKER

OK: Go to Next Step

INSPECT REAR STEREO COMPONENT SPEAKER
1. Check that the malfunction disappears when another speaker in good condition is installed.
  OK: Malfunction disappears.
  
  HINT:
  - Connect all the connectors to the rear stereo component 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.
OK: REPLACE REAR STEREO COMPONENT SPEAKER

NG: Go to Next Step
INSPECT FRONT STEREO COMPONENT SPEAKER
1. Resistance check.
  1. Measure the resistance between the terminals of the speaker.
    Standard resistance:
    
    1.2 to 2.2 Ω
NG: REPLACE FRONT STEREO COMPONENT SPEAKER

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