Inspection Procedure

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

   Standard Voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   P30-1 (MUTE) - Body ground	Engine switch on (ACC), Audio system is playing → Changing	Above 3.5 V → Below 1 V

Fig 1: Identifying Stereo Component Amplifier Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 2 

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

1. Disconnect the radio receiver connector arid stereo component amplifier connector.
   Fig 2: Identifying Radio Receiver Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   J66-7 (MUTE) - P30-1 (MUTE)	Always	Below 1 Ω
   J66-7 (MUTE) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying Stereo Component Amplifier Connectors
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(s) in the table below.

   Standard Voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   J66-7 (MUTE) - Body ground	Engine switch on (ACC), Audio system is playing	Above 3.5 V

Fig 4: Identifying Radio Receiver Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STEREO COMPONENT AMPLIFIER  (See REMOVAL  )

OK: REPLACE RADIO RECEIVER  (See REMOVAL  )