Inspection Procedure

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

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   MCVD - Body ground	Engine switch on (ACC)	4 to 6 V

Fig 1: Identifying Radio Receiver Connector Terminal E73

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NG: REPLACE RADIO RECEIVER 

OK: Go to Next Step 

1. Disconnect the radio receiver connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   TSW- - MGND	Always	Below 1 Ω
   TSW- - Body ground	Always	10 kΩ or higher

Fig 2: Identifying Radio Receiver Connector Terminal E73

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

1. Disconnect the overhead J/B (microphone) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   MCVD - ACC	Always	Below 1 Ω
   MI1+ - MIC+	Always	Below 1 Ω
   MIC- - MIC-	Always	Below 1 Ω
   ACC - Body ground	Always	10 kΩ or higher
   MIC+ - Body ground	Always	10 kΩ or higher
   MIC- - Body ground	Always	10 kΩ or higher

Fig 3: Identifying Overhead J/B (Microphone) Connector And Radio Receiver Connector E73

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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