WINDSHIELD DEICER SYSTEM Windshield Deicer does not Operate

DESCRIPTION

Pressing the windshield deicer switch with the engine switch on (IG) causes the indicator to come on and the system to be activated. After approximately 15 minutes, the system automatically stops and the indicator goes off.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DEICER RELAY OPERATES

   
   

   1. Push the windshield deicer switch.

   2. Check that operation sound of the deicer relay is heard.

      OK
      Relay operating sound is heard.

   
   

   NG

   INSPECT DEICER RELAY Click here

   OK

2. INSPECT DEICER RELAY

   
   

   1. 

      Remove the deicer relay.

   2. Measure the resistance of the windshield deicer relay.

      Standard Resistance
      Tester Connection Condition Specified Condition 3 - 5 When battery voltage is not applied between terminals 10 kΩ or higher 3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 Ω

   
   

   NG

   REPLACE DEICER RELAY

   OK

3. CHECK HARNESS AND CONNECTOR (DEICER RELAY - BATTERY)

   
   

   1. 

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition Engine room relay block No. 2 deicer relay 5 terminal - Body ground Always 11 to 14 V

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK HARNESS AND CONNECTOR (DEICER RELAY - WINDSHIELD DEICER WIRE)

   
   

   1. Disconnect the windshield deicer wire

      

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

      Standard Resistance
      Tester Connection Condition Specified Condition Engine room relay block No. 2 deicer relay 3 terminal - A44-1 (B2) Always Below 1 Ω Engine room relay block No. 2 deicer relay 3 terminal - A44-2 (B) Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

5. CHECK HARNESS AND CONNECTOR (WINDSHIELD DEICER WIRE - BODY GROUND)

   
   

   1. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition A44-3 (E) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE WINDSHIELD DEICER WIRE

6. INSPECT DEICER RELAY

   
   

   1. 

      Remove the deicer relay.

   2. Measure the resistance of the windshield deicer relay.

      Standard Resistance
      Tester Connection Condition Specified Condition 3 - 5 When battery voltage is not applied between terminals 10 kΩ or higher 3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 Ω

   
   

   NG

   REPLACE DEICER RELAY

   OK

7. CHECK HARNESS AND CONNECTOR (DEICER RELAY - BATTERY)

   
   

   1. 

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition Engine room relay block No. 2 deicer relay 1 terminal - Body ground Engine switch on (IG) 11 to 14 V

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

8. CHECK HARNESS AND CONNECTOR (DEICER RELAY - WINDSHIELD DEICER SWITCH)

   
   

   1. Disconnect the windshield deicer switch.

      

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

      Standard Resistance
      Tester Connection Condition Specified Condition Engine room relay block No. 2 deicer relay 2 terminal - J90-4 (D) Always Below 1 Ω Engine room relay block No. 2 deicer relay 2 terminal - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

9. CHECK HARNESS AND CONNECTOR (WINDSHIELD DEICER SWITCH - BATTERY)

   
   

   1. 

      Disconnect the windshield deicer switch.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition J90-5 (IG) - Body ground Engine switch on (IG) 11 to 14 V

   
   

   NG

   REPLACE HARNESS OR CONNECTOR

   OK

10. CHECK HARNESS AND CONNECTOR (WINDSHIELD DEICER SWITCH - BODY GROUND)

    
    

    1. 

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

       Standard Resistance
       Tester Connection Condition Specified Condition J90-3 (E) - Body ground Always Below 1 Ω

    
    

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE WINDSHIELD DEICER SWITCH Click here