Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUSE (ACC, RADIO NO. 1)

Disconnect the ACC fuse from the driver side junction block.
Disconnect the RADIO NO. 1 fuse from the engine room relay block.

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

Standard resistance

FUSE (ACC, RADIO NO. 1)

Tester Connection	Condition	Specified Condition
ACC fuse	Always	Below 1 Ω
RADIO NO. 1 fuse	Always	Below 1 Ω

NG: REPLACE FUSE

OK: Go To Next Step

INSPECT RELAY (Marking: ACC CUT)

Fig 1: Identifying Relay (Marking: ACC CUT)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the ACC CUT relay from the engine room relay block.

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

Standard resistance

RELAY (MARKING: ACC CUT)

Tester Connection	Condition	Specified Condition
3 - 4	Always	10 kΩ or higher
3 - 4	Battery voltage is applied to terminals 1 and 2	Below 1 Ω

NG: REPLACE RELAY

OK: Go To Next Step

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - BATTERY AND BODY GROUND)

Fig 2: Identifying R1 Receiver Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the R1 receiver connector.

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

Standard voltage

RADIO RECEIVER - BATTERY AND BODY GROUND VOLTAGE

Tester Connection	Switch Condition	Specified Condition
R1-1 (B) - Body ground	Always	11 to 14 V
R1-11 (ACC) - Body ground	Ignition switch ACC	11 to 14 V

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

Standard resistance

RADIO RECEIVER - BATTERY AND BODY GROUND RESISTANCE

Tester Connection	Condition	Specified Condition
R1-20 (GND) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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