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)

Disconnect the A38 ECU connector.
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 terminal 1 - 2	Below 1 Ω

Fig 1: Identifying Relay (Marking: ACC CUT)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RELAY

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (DISC PLAYER CHANGER - BATTERY AND BODY GROUND)

Disconnect the D24 changer connector.

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

Standard resistance

DISC PLAYER CHANGER - BATTERY AND BODY GROUND RESISTANCE

Tester Connection	Condition	Specified Condition
D24-21 (GND) - Body ground	Always	Below 1 Ω

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

Standard voltage

DISC PLAYER CHANGER - BATTERY AND BODY GROUND VOLTAGE

Tester Connection	Condition	Specified Condition
D24-17 (+B) - Body ground	Always	11 to 14 V
D24-18 (ACC) - Body ground	Ignition switch OFF	Below 1 V
D24-18 (ACC) - Body ground	Ignition switch ACC	11 to 14 V

Fig 2: Identifying Harness & Connector (Disc Player Changer - Battery & Body Ground)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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