Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM0000018Z1001X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: WIPER AND WASHER: WIPER AND WASHER SYSTEM: Front Wiper Motor Circuit; 2007 MY LX470 [08/2006 -        ]

Front Wiper Motor Circuit

DESCRIPTION

The auto wiper ECU (wiper control ECU) controls the front wiper motor.

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

When using the intelligent tester, start from *1. When not using intelligent tester, start from *2.

PROCEDURE

1.

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (FRONT WIPER MOTOR)*1

(a) Connect the intelligent tester (with CAN VIM) to the DLC3.

(b) Check that the front wiper motor operates in the ACTIVE TEST 2007 MY LX470 [08/2006 -        ]; WIPER AND WASHER: WIPER AND WASHER SYSTEM: DATA LIST / ACTIVE TEST .

HINT:

Low and high functions can be checked in the test separately. Therefore, check a high side at the time when high does not operate properly and low side at the time when low does not operate properly.

OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT FUSE (WIPER)*2

(a) Remove the WIPER fuse from the cowl side junction block RH.

(b) Measure the resistance of the fuse.

Standard resistance:

Below 1 Ω

NG

REPLACE FUSE

OK

3.

INSPECT FRONT WIPER MOTOR ASSEMBLY

(a) Inspect the front wiper motor assembly 2007 MY LX470 [08/2006 -        ]; WIPER AND WASHER: FRONT WIPER MOTOR AND LINK: INSPECTION .

NG

REPLACE FRONT WIPER MOTOR ASSEMBLY

OK

4.

CHECK WIRE HARNESS (FRONT WIPER MOTOR - AUTO WIPER ECU (WIPER CONTROL ECU))
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE