WINDSHIELD DEICER SYSTEM Windshield Deicer does not Operate

DESCRIPTION

The air conditioning amplifier assembly uses the CAN communication line to send commands to the radio receiver assembly to display the functions controlled by the air conditioning amplifier assembly on the multi-display. When the radio receiver assembly receives these commands, it uses the GVIF cable to display on the multi-display.

When the windshield deicer switch on the air conditioning screen of the multi-display is turned to "ON" with the remote operation controller assembly (remote touch), operation information is sent to the radio receiver assembly using the local bus communication line and the windshield deicer switch operation information is sent from the radio receiver assembly to the air conditioning amplifier assembly via CAN communication. When the air conditioning amplifier assembly receives windshield deicer switch operation information, it turns the front wiper deicer relay (DEICER) on and operates the windshield deicer system.

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   PERFORM ACTIVE TEST USING GTS (DEICER RELAY (FRONT))

   
   

   1. Using the GTS, perform the Active Test.

      Click here

      
      
      1. Body Electrical > Air Conditioner > Active Test

         Tester Display	Measurement Item	Control Range	Diagnostic Note
         Deicer Relay (Front)	Front wiper deicer relay (DEICER)	OFF or ON	-

      2. 
         
         10. 
             
      
      
      1. Body Electrical > Air Conditioner > Active Test

         Tester Display
         Deicer Relay (Front)

      2. 
         
         1. 
            
      3. 
         
         11. 
             

      OK
      The windshield deicer system operates normally.

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

   
   

   1. Replace the air conditioning amplifier assembly with a new or normally functioning one.

      Click here

   2. Check that the window deicer system operates normally.

      Click here

      OK
      The window deicer system operates normally.

      Result
      Proceed to OK NG

   
   
   • OK

     END (AIR CONDITIONING AMPLIFIER ASSEMBLY IS DEFECTIVE)

   • NG

     REPLACE RADIO RECEIVER ASSEMBLYClick here

3. Click here

   CHECK HARNESS AND CONNECTOR (WINDSHIELD GLASS [WINDSHIELD DEICER WIRE] - BATTERY)

   
   

   1. Disconnect the A51 windshield glass (windshield deicer wire) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition A51-2 (B) - Body ground Power switch on (IG), windshield deicer switch off Below 1 V Power switch on (IG), windshield deicer switch on 11 to 14 V A51-1 (B2) - Body ground Power switch on (IG), windshield deicer switch off Below 1 V Power switch on (IG), windshield deicer switch on 11 to 14 V

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NGClick here
4. Click here

   CHECK HARNESS AND CONNECTOR (WINDSHIELD GLASS [WINDSHIELD DEICER WIRE] - BODY GROUND)

   
   

   1. Disconnect the A51 windshield glass (windshield deicer wire) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A51-3 (E) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   
   • OK

     REPLACE WINDSHIELD GLASS (WINDSHIELD DEICER WIRE)Click here

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

5. Click here

   INSPECT FRONT WIPER DEICER RELAY (DEICER)

   
   

   1. Remove the front wiper deicer relay (DEICER) from the No. 2 engine room relay block.

   2. Inspect the front wiper deicer relay (DEICER).

      Click here

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPLACE FRONT WIPER DEICER RELAY (DEICER)

6. Click here

   CHECK HARNESS AND CONNECTOR (FRONT WIPER DEICER RELAY [DEICER] - BATTERY)

   
   
   1. 

      *a	Front view of wire harness connector (to Front Wiper Deicer Relay [DEICER])

      Remove the front wiper deicer relay (DEICER) from the No. 2 engine room relay block.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition Front wiper deicer relay (DEICER) terminal 3 - Body ground Power switch off 11 to 14 V Front wiper deicer relay (DEICER) terminal 2 - Body ground Power switch on (IG) 11 to 14 V

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

7. Click here

   CHECK HARNESS AND CONNECTOR (FRONT WIPER DEICER RELAY [DEICER] - AIR CONDITIONING AMPLIFIER ASSEMBLY AND WINDSHIELD GLASS [WINDSHIELD DEICER WIRE])

   
   

   1. Disconnect the A51 windshield glass (windshield deicer wire) connector.

   2. Disconnect the G65 air conditioning amplifier assembly connector.

   3. Remove the front wiper deicer relay (DEICER) from the No. 2 engine room relay block.

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

      Standard Resistance

      Tester Connection Condition Specified Condition Front wiper deicer relay (DEICER) terminal 5 - A51-2 (B) Always Below 1 Ω Front wiper deicer relay (DEICER) terminal 5 - A51-1 (B2) Always Below 1 Ω Front wiper deicer relay (DEICER) terminal 1 - G65-17 (FDEF) Always Below 1 Ω Front wiper deicer relay (DEICER) terminal 5 or A51-2 (B) - Body ground Always 10 kΩ or higher Front wiper deicer relay (DEICER) terminal 5 or A51-1 (B2) - Body ground Always 10 kΩ or higher Front wiper deicer relay (DEICER) terminal 1 or G65-17 (FDEF) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   
   • OK

     REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR