Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT STEREO COMPONENT AMPLIFIER

Measure the voltage according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION .

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
MUTE - Body ground	Turn ignition switch to ACC, Audio system is playing --> Changing	Above 3.5 V --> Below 1 V

Fig 1: Identifying Stereo Component Amplifier Connector

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OK: RETURN TO THE ORIGINAL INSPECTION BECAUSE THE CHECK RESULT IS NORMAL

NG: GO TO NEXT STEP.

CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION ASSEMBLY - STEREO COMPONENT AMPLIFIER)

Disconnect the radio and navigation assembly connector R12 and stereo component amplifier connector S22.

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION .

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
MUTE - MUTE	Always	Below 1
MUTE - Body ground	Always	10 k or higher

Fig 2: Disconnecting Radio & Navigation Assembly Connector R12 & Stereo Component Amplifier Connector S22

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP.

REPLACE STEREO COMPONENT AMPLIFIER
1. Replace the stereo component amplifier and check if the navigation system operates normally.
  OK:
  
  The navigation system operates normally.
OK: NORMAL OPERATION

NG: REPLACE RADIO AND NAVIGATION ASSEMBLY