Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - BODY ECU)

Disconnect the radio receiver connector R4 and body ECU connector B5.

Fig 1: Identifying Harness & Connector (Radio Receiver - Body ECU)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the values in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

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

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next step

INSPECT RADIO RECEIVER

Connect the body ECU connector.

Fig 2: Identifying Radio Receiver Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the ignition switch to the ON position.
Turn the light control switch to the TAIL or HEAD position.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

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

NG: GO TO LIGHTING SYSTEM

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