Inspection Procedure

1. Disconnect the radio receiver connector R4 and body ECU connector B5.
2. Measure the resistance according to the values in the table below.

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester connection	Condition	Specified condition
   ADIM - ACAN	Always	Below 1 Ω
   ADIM - Body ground	Always	10 kΩ or higher

Fig 1: Identifying Radio Receiver Connector R4 And Body ECU Connector B5 Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Connect the body ECU connector.
2. Turn the ignition switch to the ON position.
3. Turn the light control switch to the TAIL or HEAD position.
4. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   STANDARD VOLTAGE
   
   

   Tester connection	Condition	Specified condition
   ADIM - Body ground	Light control switch in TAIL or HEAD	10 to 14 V

Fig 2: Identifying Radio Receiver Connector R4 Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG:  GO TO LIGHTING SYSTEM

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