Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000001ABG003X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: AUDIO / VISUAL: MULTI-DISPLAY: Black Screen; 2007 MY LX470 [08/2006 -        ]

Black Screen

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

INSPECT BATTERY (VOLTAGE)

(a) Measure the voltage of the battery.

Standard voltage:

11 to 14 V

NG

RECHARGE OR REPLACE BATTERY

OK

2.

INSPECT FUSE (ACC, ECU-B1, ECU-IG1)

(a) Remove the ACC, ECU-B1 and ECU-IG1 fuses from cowl side junction block LH.

(b) Measure the resistance of the fuses.

Standard resistance:

Below 1 Ω

NG

REPLACE FUSE

OK

3.

CHECK WIRE HARNESS (MULTI-DISPLAY - BATTERY AND BODY GROUND)

(a) Disconnect the M12 display connector.

(b) Measure the resistance of the wire harness side connector.

Standard resistance:

Tester Connection

Specified Condition

M12-8 (GND) - Body ground

Below 1 Ω

(c) Measure the voltage of the wire harness side connector.

Standard voltage:

Tester Connection

Condition

Specified Condition

M12-9 (+B) - Body ground

Always

10 to 14 V

M12-10 (ACC) - Body ground

Ignition switch ACC

10 to 14 V

M12-11 (IG) - Body ground

Ignition switch ON

10 to 14 V
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

REPLACE MULTI-DISPLAY