Inspection Procedure

1. Measure the voltage according to the value in STEREO COMPONENT AMPLIFIER  .

   Standard voltage 

   STEREO COMPONENT AMPLIFIER
   
   

   Tester connection	Condition	Specification
   MUTE (S14-1) - Body ground	Turn ignition switch to ACC, Audio system is playing -> changing	Above 3.5 V -> Blow 1 V

   Fig 1: Inspecting Stereo Component Amplifier

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 2 

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

1. Disconnect the radio receiver R16 connector and stereo component amplifier S14 connector.
2. Measure the resistance according to the values in RADIO RECEIVER - STEREO COMPONENT AMPLIFIER  .

   Standard resistance 

   RADIO RECEIVER - STEREO COMPONENT AMPLIFIER
   
   

   Tester connection	Condition	Specified condition
   MUTE (R16-7) - MUTE (S14-1)	Always	Below 1 Ω
   MUTE (R16-7) - Body ground	Always	10 kΩ or higher

   Fig 2: Checking Harness And Connector (Radio Receiver)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 3: Checking Harness And Connector (Stereo Component Amplifier)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Reconnect the stereo component amplifier connector.
2. Measure the voltage according to the value in RADIO RECEIVER  .

   Standard voltage 

   RADIO RECEIVER
   
   

   Tester connection	Condition	Specification
   MUTE (R16-7) - Body ground	Turn ignition switch to ACC	Above 3.5 V

   Fig 4: Inspecting Radio Receiver

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STEREO COMPONENT AMPLIFIER 

OK: REPLACE RADIO RECEIVER