FRONT POWER SEAT CONTROL SYSTEM (for Driver Side) Power Seat does not Return to Memorized Position

DESCRIPTION

If any of seat memory switches M1, M2 and M3 is pressed, the outer mirror control ECU assembly detects the seat memory switch status and sends the switch signal to the position control ECU and switch assembly through the CAN communication line. The position control ECU and switch assembly operates the seat control motor to move the corresponding seat to the memorized position.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

   
   

   1. Use the intelligent tester to check if the CAN communication system is functioning normally Click here.

      OK
      CAN communication DTC is not output.

   
   

   NG

   GO TO CAN COMMUNICATION SYSTEM Click here

   OK

2. CHECK POWER SEAT CONTROL FUNCTION (USING POSITION CONTROL ECU AND SWITCH)

   
   

   1. Check that each function of the power seat operates normally by using the switches on the position control ECU and switch assembly.

      OK
      Each function of the power seat operates normally using the switches on the position control ECU and switch assembly.

   
   

   NG

   GO TO OTHER FLOW CHART (Power Seat does not Operate with Front Power Seat Switch) Click here

   OK

3. CHECK SEAT POSITION MEMORY FUNCTION

   
   

   1. Perform a memory operation and check that the buzzer sounds to indicate the completion of the memory operation.

      Note

      
      

      • The seat position will not be recorded if the SET switch and 2 or more of the memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.

      • If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released.

      OK
      Seat position memory function is normal.

   
   

   NG

   GO TO OTHER FLOW CHART (Power Seat Position is not Memorized) Click here

   OK

4. CHECK SEAT POSITION RESTORING FUNCTION

   
   

   1. Under each of the following conditions, check that the seat restoring operation operates by pressing the M1 switch, M2 switch or M3 switch

      
      

      • The engine switch is on (IG) and the shift lever is in P.

      • The engine switch is off, and the M1 switch, M2 switch or M3 switch is pressed within 30 seconds after the engine switch is turned off.

      Result
      Result Proceed to Seat restoring operation does not operate for both conditions A Seat restoring operation operates under either condition B

   
   

   B

   REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here

   A

5. READ VALUE USING INTELLIGENT TESTER (SEAT POSITION MEMORY)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the intelligent tester on.

   4. Enter the following menus: Body / D-Seat / Data List.

   5. Read the Data List according to the display on the intelligent tester.

      D-Seat

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Seat Memory No1	Seat position memorized with M1 switch / Mem or Not Mem	Mem: Memorized Not Mem: Not memorized	-
      Seat Memory No2	Seat position memorized with M2 switch / Mem or Not Mem	Mem: Memorized Not Mem: Not memorized	-
      Seat Memory No3	Seat position memorized with M3 switch / Mem or Not Mem	Mem: Memorized Not Mem: Not memorized	-

      OK
      Mem or Not Mem appears on the screen.

   
   

   NG

   GO TO OTHER FLOW CHART (Power Seat Position is not Memorized) Click here

   OK

   REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here