Inspection Procedure

1. Disconnect the R1 receiver connector.
   Fig 1: Identifying R1 Receiver Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A25 switch connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   R1-2 (DOS1) - A25-8	Below 1 Ω
   R1-2 (DOS1) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Disconnect A25 connector.
   Fig 2: Identifying A25 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance and voltage of the wire harness side connector.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   A25-6 (GND) - Body ground	Below 1 Ω

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   A25-10 (+B) - Body ground	Always	10 to 14 V
   A25-4 (ACC) - Body ground	Ignition switch ACC	10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. After replacing the instrument cluster finish panel lower center (audio door control switch), check that the audio door can be opened and closed by using the audio door control switch.

   OK: 

   Audio door can be opened and closed with switch. 

NG: REPLACE RADIO RECEIVER ASSEMBLY 

OK: END