REAR POWER SEAT CONTROL SYSTEM(w/ Memory) Power Seat Position is not Memorized or does not Return to Memorized Position

DESCRIPTION

When the M1 switch, M2 switch or return switch of the rear power seat switch is pressed while the SET switch is being pressed, or when the M1 switch, M2 switch or return switch is pressed within 3 seconds of pressing the SET switch, the position control ECU assembly memorizes the position of the motors. When the M1 switch, M2 switch or return switch is pressed, the position control ECU assembly operates each motor based on the respective memorized position.

WIRING DIAGRAM

B006L3QE03
B006L3QE04

PROCEDURE


  1. CHECK REAR POWER SEAT OPERATION


    1. Check that each function of the power seat operates normally by using the rear power seat switch.

      Click here

      OK
      Each function of the power seat operates normally using the rear power seat switch.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  2. CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION


    1. Check that the seat position memory and restoring functions operate properly.

      Click here

      Result
      Result Proceed to
      Seat position memory and restoring functions do not operate properly (for Rear LH Side) A
      Seat position memory and restoring functions do not operate properly (for Rear RH Side) B

    B
    A
  3. CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION


    1. Check that the seat position memory and restoring functions operate properly.

      Click here

      Result
      Result Proceed to
      Seat position memory and restoring functions of both reclining and ottoman functions do not operate properly A
      Seat position memory and restoring functions of the reclining function do not operate properly B
      Seat position memory and restoring functions of the ottoman open/close function do not operate properly C
      Seat position memory and restoring functions of the ottoman expansion/contraction function do not operate properly D

    B
    C
    D
    A
  4. INSPECT REAR POWER SEAT SWITCH LH


    1. Remove the rear power seat switch LH.

      Click here

    2. Inspect the rear power seat switch LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG
    OK
  5. CHECK HARNESS AND CONNECTOR (REAR POWER SEAT SWITCH LH - POSITION CONTROL ECU ASSEMBLY LH)


    1. Disconnect the Y28 rear power seat switch LH connector.

    2. Disconnect the Y30 position control ECU assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y28-7 (LM1) - Y30-21 (SWS3) Always Below 1 Ω
      Y28-7 (LM1) or Y30-21 (SWS3) - Body ground Always 10 kΩ or higher
      Y28-6 (LM3) - Y30-2 (SWS2) Always Below 1 Ω
      Y28-6 (LM3) or Y30-2 (SWS2) - Body ground Always 10 kΩ or higher
      Y28-5 (LMRY) - Y30-1 (SWS1) Always Below 1 Ω
      Y28-5 (LMRY) or Y30-1 (SWS1) - Body ground Always 10 kΩ or higher
      Y28-8 (LM2) - Y30-16 (SWD1) Always Below 1 Ω
      Y28-8 (LM2) or Y30-16 (SWD1) - Body ground Always 10 kΩ or higher
      Y28-14 (LUP) - Y30-36 (SWD2) Always Below 1 Ω
      Y28-14 (LUP) or Y30-36 (SWD2) - Body ground Always 10 kΩ or higher
      Y28-15 (LMSF) - Y30-15 (SWD3) Always Below 1 Ω
      Y28-15 (LMSF) or Y30-15 (SWD3) - Body ground Always 10 kΩ or higher
      Y28-16 (LMSR) - Y30-35 (SWD4) Always Below 1 Ω
      Y28-16 (LMSR) or Y30-35 (SWD4) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  6. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY LH - RECLINING MOTOR LH [Inner Side])


    1. Disconnect the Y30 position control ECU assembly LH connector.

    2. Disconnect the R4 No. 1 seatback frame sub-assembly LH (reclining motor LH [inner side]) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y30-19 (PVC1) - R4-5 (RSRV) Always Below 1 Ω
      Y30-19 (PVC1) or R4-5 (RSRV) - Body ground Always 10 kΩ or higher
      Y30-11 (SG) - R4-6 (RSRG) Always Below 1 Ω
      Y30-11 (SG) or R4-6 (RSRG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK
    NG
  7. CHECK HARNESS AND CONNECTOR (RECLINING MOTOR LH [Inner Side] - POSITION CONTROL ECU ASSEMBLY LH)


    1. Disconnect the R4 No. 1 seatback frame sub-assembly LH (riclining motor LH [inner Side]) connector.

    2. Disconnect the Y30 position control ECU assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R4-5 (RSRV) - Y30-19 (PVC1) Always Below 1 Ω
      R4-5 (RSRV) or Y30-19 (PVC1) - Body ground Always 10 kΩ or higher
      R4-2 (RSSR) - Y30-32 (SRCL) Always Below 1 Ω
      R4-2 (RSSR) or Y30-32 (SRCL) - Body ground Always 10 kΩ or higher
      R4-6 (RSRG) - Y30-11 (SG) Always Below 1 Ω
      R4-6 (RSRG) or Y30-11 (SG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  8. CHECK POSITION CONTROL ECU ASSEMBLY LH


    1. Reconnect the Y30 position control ECU assembly LH connector.

      B006R0AE04
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Y30-19 (PVC1) - Y30-11 (SG) Reclining switch on 5 to 6.6 V
      Result
      Proceed to
      OK
      NG

    NG
    OK
  9. CHECK NO. 1 SEATBACK FRAME SUB-ASSEMBLY LH (RECLINING MOTOR LH [Inner Side])


    1. B006LOVC07
      *a

      Component with harness connected

      (Reclining Motor LH [Inner Side])

      Reconnect the No. 1 seatback frame sub-assembly LH (reclining motor LH [inner side]) connector.

    2. Check for pulse according to the value(s) in the table below.

      Standard
      Tester Connection Switch Condition Specified Condition
      R4-2 (RSSR) - Body ground Reclining switch on Pulse generation
      Result
      Proceed to
      OK
      NG

    OK
    NG
  10. CHECK HARNESS AND CONNECTOR (OTTOMAN MOTOR LH [Open/Close] - POSITION CONTROL ECU ASSEMBLY LH)


    1. Disconnect the N3 rear lower inner reclining adjuster arm sub-assembly LH (ottoman motor LH [open/close]) connector.

    2. Disconnect the Y30 position control ECU assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N3-5 (OSRV) - Y30-19 (PVC1) Always Below 1 Ω
      N3-5 (OSRV) or Y30-19 (PVC1) - Body ground Always 10 kΩ or higher
      N3-2 (OSRB) - Y30-12 (SOTG) Always Below 1 Ω
      N3-2 (OSRB) or Y30-12 (SOTG) - Body ground Always 10 kΩ or higher
      N3-6 (OSRG) - Y30-11 (SG) Always Below 1 Ω
      N3-6 (OSRG) or Y30-11 (SG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  11. CHECK POSITION CONTROL ECU ASSEMBLY LH


    1. Reconnect the Y30 position control ECU assembly LH connector.

      B006R0AE05
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Y30-19 (PVC1) - Y30-11 (SG) Ottoman switch (open/close) on 5 to 6.6 V
      Result
      Proceed to
      OK
      NG

    NG
    OK
  12. CHECK REAR LOWER INNER RECLINING ADJUSTER ARM SUB-ASSEMBLY LH (OTTOMAN MOTOR LH [Open/Close])


    1. B006LOVC08
      *a

      Component with harness connected

      (Ottoman Motor LH [Open/Close])

      Reconnect the rear lower inner reclining adjuster arm sub-assembly LH (ottoman motor LH [open/close]) connector.

    2. Check for pulse according to the value(s) in the table below.

      Standard
      Tester Connection Switch Condition Specified Condition
      N3-2 (OSRB) - Body ground Ottoman switch (open/close) on Pulse generation
      Result
      Proceed to
      OK
      NG

    OK
    NG
  13. CHECK HARNESS AND CONNECTOR (OTTOMAN MOTOR LH [Expansion/Contraction] - POSITION CONTROL ECU ASSEMBLY LH)


    1. Disconnect the N4 rear lower inner reclining adjuster arm sub-assembly LH (ottoman motor LH [expansion/contraction]) connector.

    2. Disconnect the Y30 position control ECU assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N4-2 (SSR1) - Y30-14 (SOTE) Always Below 1 Ω
      N4-2 (SSR1) or Y30-14 (SOTE) - Body ground Always 10 kΩ or higher
      N4-3 (SSR2) - Y30-11 (SG) Always Below 1 Ω
      N4-3 (SSR2) or Y30-11 (SG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  14. CHECK POSITION CONTROL ECU ASSEMBLY LH


    1. B006OBNC68
      *a

      Front view of wire harness connector

      (to Rear Lower Inner Reclining Adjuster Arm Sub-assembly LH)

      Disconnect the N4 rear lower inner reclining adjuster arm sub-assembly LH (ottoman motor LH [expansion/contraction]) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N4-2 (SSR1) - N4-3 (SSR2) Ottoman switch (expansion/contraction) on 4.8 to 5.1 V
      Result
      Proceed to
      OK
      NG

    NG
    OK
  15. CHECK REAR RECLINING ADJUSTER ARM SUB-ASSEMBLY LOWER INNER LH (OTTOMAN MOTOR LH [Expansion/Contraction])


    1. B006LAMC03
      *a

      Component with harness connected

      (Ottoman Motor LH [Expansion/Contraction])

      Reconnect the rear lower inner reclining adjuster arm sub-assembly LH (ottoman motor LH [expansion/contraction]) connector.

    2. Check for pulse according to the value(s) in the table below.

      Standard
      Tester Connection Switch Condition Specified Condition
      N4-2 (SSR1) - Body ground Ottoman switch (expansion/contraction) on Pulse generation
      Result
      Proceed to
      OK
      NG

    OK
    NG
  16. CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION


    1. Check that the seat position memory and restoring functions operate properly.

      Click here

      Result
      Result Proceed to
      Seat position memory and restoring functions of both reclining and ottoman functions do not operate properly A
      Seat position memory and restoring functions of the reclining function do not operate properly B
      Seat position memory and restoring functions of the ottoman open/close function do not operate properly C
      Seat position memory and restoring functions of the ottoman expansion/contraction function do not operate properly D

    B
    C
    D
    A
  17. INSPECT REAR POWER SEAT SWITCH RH


    1. Remove the rear power seat switch RH.

      Click here

    2. Inspect the rear power seat switch RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG
    OK
  18. CHECK HARNESS AND CONNECTOR (REAR POWER SEAT SWITCH RH - POSITION CONTROL ECU ASSEMBLY RH)


    1. Disconnect the Y8 rear power seat switch RH connector.

    2. Disconnect the Y10 position control ECU assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y8-7 (RM1) - Y10-21 (SWS3) Always Below 1 Ω
      Y8-7 (RM1) or Y10-21 (SWS3) - Body ground Always 10 kΩ or higher
      Y8-6 (RM3) - Y10-2 (SWS2) Always Below 1 Ω
      Y8-6 (RM3) or Y10-2 (SWS2) - Body ground Always 10 kΩ or higher
      Y8-5 (RMRY) - Y10-1 (SWS1) Always Below 1 Ω
      Y8-5 (RMRY) or Y10-1 (SWS1) - Body ground Always 10 kΩ or higher
      Y8-8 (RM2) - Y10-16 (SWD1) Always Below 1 Ω
      Y8-8 (RM2) or Y10-16 (SWD1) - Body ground Always 10 kΩ or higher
      Y8-14 (RUP) - Y10-36 (SWD2) Always Below 1 Ω
      Y8-14 (RUP) or Y10-36 (SWD2) - Body ground Always 10 kΩ or higher
      Y8-15 (RMSF) - Y10-15 (SWD3) Always Below 1 Ω
      Y8-15 (RMSF) or Y10-15 (SWD3) - Body ground Always 10 kΩ or higher
      Y8-16 (RMSR) - Y10-35 (SWD4) Always Below 1 Ω
      Y8-16 (RMSR) or Y10-35 (SWD4) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  19. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY RH - RECLINING MOTOR RH [Inner Side])


    1. Disconnect the Y10 position control ECU assembly RH connector.

    2. Disconnect the Q3 No. 1 seatback frame sub-assembly RH (reclining motor RH [inner side]) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y10-19 (PVC1) - Q3-5 (RSRV) Always Below 1 Ω
      Y10-19 (PVC1) or Q3-5 (RSRV) - Body ground Always 10 kΩ or higher
      Y10-11 (SG) - Q3-6 (RSRG) Always Below 1 Ω
      Y10-11 (SG) or Q3-6 (RSRG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK
    NG
  20. CHECK HARNESS AND CONNECTOR (RECLINING MOTOR RH [Inner Side] - POSITION CONTROL ECU ASSEMBLY RH)


    1. Disconnect the Q3 No. 1 seatback frame sub-assembly RH (reclining motor RH [inner side]) connector.

    2. Disconnect the Y10 position control ECU assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q3-5 (RSRV) - Y10-19 (PVC1) Always Below 1 Ω
      Q3-5 (RSRV) or Y10-19 (PVC1) - Body ground Always 10 kΩ or higher
      Q3-2 (RSSR) - Y10-32 (SRCL) Always Below 1 Ω
      Q3-2 (RSSR) or Y10-32 (SRCL) - Body ground Always 10 kΩ or higher
      Q3-6 (RSRG) - Y10-11 (SG) Always Below 1 Ω
      Q3-6 (RSRG) or Y10-11 (SG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  21. CHECK POSITION CONTROL ECU ASSEMBLY RH


    1. Reconnect the Y10 position control ECU assembly RH connector.

      B006R0AE01
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Y10-19 (PVC1) - Y10-11 (SG) Reclining switch on 5 to 6.6 V
      Result
      Proceed to
      OK
      NG

    NG
    OK
  22. CHECK NO. 1 SEATBACK FRAME SUB-ASSEMBLY RH (RECLINING MOTOR RH [Inner Side])


    1. B006LOVC05
      *a

      Component with harness connected

      (Reclining Motor RH [Inner Side])

      Reconnect the No. 1 seatback frame sub-assembly RH (reclining motor RH [inner side]) connector.

    2. Check for pulse according to the value(s) in the table below.

      Standard
      Tester Connection Switch Condition Specified Condition
      Q3-2 (RSSR) - Body ground Reclining switch on Pulse generation
      Result
      Proceed to
      OK
      NG

    OK
    NG
  23. CHECK HARNESS AND CONNECTOR (OTTOMAN MOTOR RH [Open/Close] - POSITION CONTROL ECU ASSEMBLY RH)


    1. Disconnect the N1 rear lower inner reclining adjuster arm sub-assembly RH (ottoman motor RH [open/close]) connector.

    2. Disconnect the Y10 position control ECU assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N1-5 (OSRV) - Y10-19 (PVC1) Always Below 1 Ω
      N1-5 (OSRV) or Y10-19 (PVC1) - Body ground Always 10 kΩ or higher
      N1-2 (OSRB) - Y10-12 (SOTG) Always Below 1 Ω
      N1-2 (OSRB) or Y10-12 (SOTG) - Body ground Always 10 kΩ or higher
      N1-6 (OSRG) - Y10-11 (SG) Always Below 1 Ω
      N1-6 (OSRG) or Y10-11 (SG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  24. CHECK POSITION CONTROL ECU ASSEMBLY RH


    1. Reconnect the Y10 position control ECU assembly RH connector.

      B006R0AE07
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Y10-19 (PVC1) - Y10-11 (SG) Ottoman switch (open/close) on 5 to 6.6 V
      Result
      Proceed to
      OK
      NG

    NG
    OK
  25. CHECK REAR LOWER INNER RECLINING ADJUSTER ARM SUB-ASSEMBLY LH (OTTOMAN MOTOR RH [Open/Close])


    1. B006LOVC12
      *a

      Component with harness connected

      (Ottoman Motor RH [Open/Close])

      Reconnect the rear lower inner reclining adjuster arm sub-assembly RH (ottoman motor RH [open/close]) connector.

    2. Check for pulse according to the value(s) in the table below.

      Standard
      Tester Connection Switch Condition Specified Condition
      N1-2 (OSRB) - Body ground Ottoman switch (open/close) on Pulse generation
      Result
      Proceed to
      OK
      NG

    OK
    NG
  26. CHECK HARNESS AND CONNECTOR (OTTOMAN MOTOR RH [Expansion/Contraction] - POSITION CONTROL ECU ASSEMBLY RH)


    1. Disconnect the N2 rear lower inner reclining adjuster arm sub-assembly RH (ottoman motor RH [expansion/contraction]) connector.

    2. Disconnect the Y10 position control ECU assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N2-2 (SSR1) - Y10-14 (SOTE) Always Below 1 Ω
      N2-2 (SSR1) or Y10-14 (SOTE) - Body ground Always 10 kΩ or higher
      N2-3 (SSR2) - Y10-11 (SG) Always Below 1 Ω
      N2-3 (SSR2) or Y10-11 (SG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  27. CHECK POSITION CONTROL ECU ASSEMBLY RH


    1. B006OBNC69
      *a

      Front view of wire harness connector

      (to Rear Lower Inner Reclining Adjuster Arm Sub-assembly RH)

      Disconnect the N2 rear lower inner reclining adjuster arm sub-assembly RH (ottoman motor RH [expansion/contraction]) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N2-2 (SSR1) - N4-3 (SSR2) Ottoman switch (expansion/contraction) on 4.8 to 5.1 V
      Result
      Proceed to
      OK
      NG

    NG
    OK
  28. CHECK REAR LOWER INNER RECLINING ADJUSTER ARM SUB-ASSEMBLY RH (OTTOMAN MOTOR RH [Expansion/Contraction])


    1. B006LAMC04
      *a

      Component with harness connected

      (Ottoman Motor RH [Expansion/Contraction])

      Reconnect the rear lower inner reclining adjuster arm sub-assembly RH (ottoman motor RH [expansion/contraction]) connector.

    2. Check for pulse according to the value(s) in the table below.

      Standard
      Tester Connection Switch Condition Specified Condition
      N2-2 (SSR1) - Body ground Ottoman switch (expansion/contraction) on Pulse generation
      Result
      Proceed to
      OK
      NG

    OK
    NG