Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000001B6Q004X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: WINDSHIELD / WINDOWGLASS: POWER WINDOW CONTROL SYSTEM: Power Source Circuit; 2007 MY LX470 [08/2006 -        ]

Power Source Circuit

DESCRIPTION

This circuit supplies power to operate the power window master switch assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

INSPECT FUSE (ECU-IG1, AM1, P/W (FL))

(a) Check the continuity of ECU-IG1, AM1 and P/W (FL) fuses.

OK:

Continuity

NG

REPLACE FUSE

OK

2.

CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (BATTERY VOLTAGE)

(a) Turn the ignition switch OFF.

(b) Measure the voltage between terminals CPUB, SIG, BDR and GND.

Standard voltage:

Terminal Name

Condition

Specified Condition

CPUB - Body ground

Always

10 to 14 V

BDR - Body ground

Always

10 to 14 V

SIG - Body ground

Ignition switch ON

10 to 14 V

GND - Body ground

Always

Below 1 V
NG

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

OK

3.

CHECK WIRE HARNESS (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY - BODY GROUND)

(a) Refer to inspection 2007 MY LX470 [08/2006 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: ELECTRONIC CIRCUIT INSPECTION PROCEDURE .

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE