Inspection Procedure

Standard: 

Wiper function is correct. 

NG: GO TO  WIPER AND WASHER SYSTEM 

OK: GO TO NEXT STEP 

1. Check for an open or short circuit in harness and connector between the distance control ECU and the front washer motor (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Check for an open or short circuit in harness and connector between the distance control ECU and the combination switch (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

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

   Voltage 

   DISTANCE CONTROL ECU ASSEMBLY
   
   

   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

   Fig 1: Inspecting Distance Control ECU Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE DISTANCE CONTROL ECU ASSEMBLY 

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