Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST USING TECHSTREAM

Connect the Techstream to the DLC3
Turn the engine switch on (IG)
Turn the Techstream on
Enter the following menus" Body Electrical / Body No 3 / Active Test.

Check the operation

Body No. 3 (Main Body ECU LH)

DIAGNOSTIC NOTE REFERENCE CHART

Tester Display	Test Part	Control Range	Diagnostic Note
Wiper Motor Hi	Front wiper motor HI operation	ON/OFF	-
Wiper Motor Lo	Front wiper motor LO operation	ON/OFF	-

OK: Front wiper motor operates.

NG: Go to step 2

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

INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY
1. Remove the windshield wiper motor assembly (See FRONT WIPER MOTOR ).
2. Check the LO operation
  1. Connect a positive (+) battery lead to terminal 1 (+1) and a negative (-) lead to terminal 5 (E), and check that the motor operates at low speed (LO).
    OK: Motor operates at low speed (LO).
3. Check the HI operation
  1. Connect a positive (+) battery lead to terminal 4 (+2) and a negative (-) lead to terminal 5 (E), and check that the motor operates at high speed (HI).
    OK: Motor operates at high speed (HI).
  Fig 1: Identifying Windshield Wiper Motor Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY (See FRONT WIPER MOTOR )

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR ASSEMBLY - MAIN BODY ECU LH)

Disconnect the A19 windshield wiper motor assembly connector

Fig 2: Identifying Windshield Wiper Motor Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the A30 and LK main body ECU LH (cowl side junction block LH) connector

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

Standard Resistance

TESTER CONNECTION TESTER CONNECTION CHART

Tester Connection	Condition	Specified Condition
LK-9 (WIG) - A19-2(B)	Always	Below 1 Ω
A30-1 (S/S) - A19-1 (+1)	Always	Below 1 Ω
A30-2 (+2) - A19-4(+2)	Always	Below 1 Ω
A30-3 (S/M) - A19-3 (+S)	Always	Below 1 Ω
A19-3 (+S) - Body ground	Always	10 kΩ or higher
A19-2 (B) - Body ground	Always	10 kΩ or higher
A19-4 (+2) - Body ground	Always	10 kΩ or higher
A19-5 (E) - Body ground	Always	Below 1 Ω
A19-1 (+1) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)