POWER WINDOW CONTROL SYSTEM Key-off Operation Function Operates even if Operating Conditions are not Satisfied

DESCRIPTION

• When the front doors are closed, each power window regulator motor can control its power window operation for approximately 43 seconds after the engine switch is turned from on (IG) to off by receiving operation permission signals from the main body ECU (multiplex network body ECU). However, when approximately 43 seconds have elapsed, or a front side door is opened within approximately 43 seconds of the engine switch being turned off, all the power window regulator motors disable manual operation.

• During the auto function operation, when 43 seconds have elapsed and key-off operation is prohibited, the window open operation stops immediately.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK LIN COMMUNICATION SYSTEM

   
   

   1. Check for LIN communication system DTCs related to the power window control system Click here.

      OK
      LIN communication system DTCs are not output.

   
   

   NG

   GO TO LIN COMMUNICATION SYSTEM Click here

   OK

2. CHECK POWER WINDOW OPERATION FUNCTION AFTER ENGINE SWITCH TURNED OFF

   
   

   1. Check the power window operation function after the engine switch is turned off Click here.

      Result

      Result	Proceed to
      Front side door is opened within 43 seconds. but power windows can still operate	A
      43 seconds. pass and power windows can still operate	B

   
   

   B

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

   A

3. READ VALUE USING GTS (DOOR COURTESY)

   
   

   1. Use the Data List to check if the main body ECU (multiplex network body ECU) is functioning properly Click here.

      Main Body

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      FL Door Courtesy	Front door courtesy light switch LH signal / ON or OFF	ON: Front door LH closed OFF: Front door LH open	-
      FR Door Courtesy	Front door courtesy light switch RH signal / ON or OFF	ON: Front door RH closed OFF: Front door RH open	-

      OK
      On GTS screen, each item changes between ON and OFF according to above chart.

   
   

   NG

   CHECK FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY Click here

   OK

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

4. CHECK FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY

   
   

   1. Open a front door and check that the map light illuminates Click here.

      OK
      Map light illuminates.

   
   

   NG

   REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY Click here

   OK

5. CHECK COWL SIDE JUNCTION BLOCK LH

   
   

   1. Temporarily replace the cowl side junction block LH with a new or normally functioning one Click here.

   2. Check that the key-off operation function operates normally.

      OK
      Key-off operation function operates normally.

   
   

   NG

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

   OK

   END (COWL SIDE JUNCTION BLOCK LH WAS DEFECTIVE)