WIPER AND WASHER SYSTEM Wiper and Washer Switch Circuit

DESCRIPTION

This circuit detects the state of the windshield wiper switch assembly (front wiper switch and front washer switch) and sends it to the windshield wiper relay assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

   
   
   1. 

      *1	Windshield Wiper Switch Assembly (Adjusting Ring Position)
      *a	Component without harness connected (Windshield Wiper Switch Assembly)

      Remove the windshield wiper switch assembly.

      Click here

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

      Standard Resistance
      Front Wiper Switch Tester Connection Condition Specified Condition E10-2 (+B) - E10-3 (+1) MIST Below 1 Ω E10-3 (+1) - E10-1 (+S) OFF E10-3 (+1) - E10-1 (+S) AUTO E10-8 (AUTO) - E10-9 (E) E10-2 (+B) - E10-3 (+1) LO E10-2 (+B) - E10-4 (+2) HI
      Rear Wiper Switch (w/ Rear Wiper) Tester Connection Condition Specified Condition E9-2 (C1R) - E9-4 (EW) OFF 10 kΩ or higher E9-3 (+1R) - E9-4 (EW) E9-2 (C1R) - E9-4 (EW) INT Below 1 Ω E9-3 (+1R) - E9-4 (EW) ON
      Front Washer Switch Tester Connection Condition Specified Condition E9-4 (EW) - E9-7 (WF) ON Below 1 Ω E10-5 (WR) - E10-10 (+B2) E9-4 (EW) - E9-7 (WF) OFF 10 kΩ or higher E10-5 (WR) - E10-10 (+B2)
      Rear Washer Switch (w/ Rear Wiper) Tester Connection Condition Specified Condition E9-4 (EW) - E10-5 (WR) ON Below 1 Ω E9-7 (WF) - E10-10 (+B2) E9-4 (EW) - E10-5 (WR) OFF 10 kΩ or higher E9-7 (WF) - E10-10 (+B2)
      Adjusting Ring* Tester Connection Condition Specified Condition E10-6 (VR2) - E10-7 (VR1) P1 209 to 231 Ω P2 114 to 126 Ω P3 58.9 to 65.1 Ω P4 Below 1 Ω

      Tech Tips

      *: The rain sensor sensitivity can be adjusted by the windshield wiper switch assembly adjusting ring.

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY Click here

   OK

2. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH ASSEMBLY - WINDSHIELD WIPER RELAY ASSEMBLY AND BODY GROUND)

   
   

   1. Disconnect the E95 windshield wiper relay assembly connector.

   2. Disconnect the A11 windshield wiper motor assembly connector.

   3. Disconnect the A17 windshield washer motor and pump assembly connector.

   4. Disconnect the 3D instrument panel junction block assembly connectors.

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

      Standard Resistance

      Tester Connection Condition Specified Condition E9-4 (EW) - Body ground Always Below 1 Ω E9-7 (WF) - E95-4 (W) - A17-2 Always Below 1 Ω E9-7 (WF) - Body ground Always 10 kΩ or higher E10-1 (+S) - E95-10 (+1) Always Below 1 Ω E10-1 (+S) - Body ground Always 10 kΩ or higher E10-2 (+B) - 3D-3 Always Below 1 Ω E10-2 (+B) - Body ground Always 10 kΩ or higher E10-3 (+1) - A11-5 (+1) *1 Always Below 1 Ω E10-3 (+1) - A11-1 (+1) *2 Always Below 1 Ω E10-3 (+1) - Body ground Always 10 kΩ or higher E10-4 (+2) - E95-11 (+2) - A11-3 (+2) - 3D-7 *1 Always Below 1 Ω E10-4 (+2) - E95-11 (+2) - A11-4 (+2) - 3D-7 *2 Always Below 1 Ω E10-4 (+2) - Body ground Always 10 kΩ or higher E10-6 (VR2) - E95-8 (VR2) Always Below 1 Ω E10-6 (VR2) - Body ground Always 10 kΩ or higher E10-7 (VR1) - E95-21 (VR1) Always Below 1 Ω E10-7 (VR1) - Body ground Always 10 kΩ or higher E10-8 (AUTO) - E95-3 (C1) Always Below 1 Ω E10-8 (AUTO) - Body ground Always 10 kΩ or higher E10-9 (E) - E95-5 (CO) Always Below 1 Ω E10-9 (E) - Body ground Always 10 kΩ or higher

      
      

      • *1: for LHD

      • *2: for RHD

      Result
      Proceed to OK NG

   
   

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR