Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT WIPER AND WASHER SYSTEM
Standard:

Wiper function is correct.
1. NG: GO TO WIPER AND WASHER SYSTEM (See PROBLEM SYMPTOMS TABLE )
2. OK: Go to next step
CHECK WIRE HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - FRONT WASHER MOTOR)
1. Check for an open or short circuit in harness and connector between the distance control ECU and the front washer motor (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
1. NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
2. OK: Go to next step
CHECK WIRE HARNESS AND CONNECTOR (DISTANCE CONTROL ECU - COMBINATION SWITCH)
1. Check for an open or short circuit in harness and connector between the distance control ECU and the combination switch (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
1. NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
2. OK: Go to next step

INSPECT DISTANCE CONTROL ECU ASSY

Remove the distance control ECU with connector.
Turn the ignition switch ON.
Measure the voltage between terminal WIP2 (D2-2) and WASH (D2-3) of distance control ECU, when combination switch is operated.

Fig 1: Measuring Voltage Between Terminal WIP2 (D2-2) & WASH (D2-3) Of Distance Control ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard:

TERMINAL WIP2 (D2-2) AND WASH (D2-3) OF DISTANCE CONTROL ECU

Switch	Position	Specified condition
Wiper Switch	OFF	Below 1 V
Wiper Switch	HI	10 to 14 V
Washer Switch	OFF	10 to 14 V
Washer Switch	ON	Below 1 V

NG: REPLACE DISTANCE CONTROL ECU ASSY (See DISTANCE CONTROL ECU ASSY )
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )