Inspection Procedure

1. Check that each function of the power seat operates normally by using each switch of the power seat.
   1. When no function operates normally, proceed to A.
   2. When some of the functions operate normally, proceed to B.

1. B: Go to step   8 . 
2. A: Go to next step. 

1. Check whether the D-SEAT fuse and the P-SEAT fuse operate normally.

1. NG: REPLACE FUSES 
2. OK: Go to next step. 

1. Disconnect the seat ECU connector and connect the seat wire harness to the floor wire harness.
2. Inspect the connector on the wire harness side.
   Fig 1: Identifying Seat ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 2: Seat ECU Specifications Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   If circuit is not as specified, inspect the circuits connected to other parts.

1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
2. OK: Go to next step. 

1. Disconnect the seat ECU connector and inspect the connector on the wire harness side.
   Fig 3: Identifying Seat ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 4: Seat ECU Specifications Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

If circuit is not as specified, inspect the circuits connected to other parts.

1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
2. OK: Go to next step. 

1. Inspect the front power seat switch RH continuity.
   Fig 5: Inspecting Front Power Seat Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Slide switch: 

   Fig 6: Slide Switch Continuity Table (RH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Front vertical switch: 

   Fig 7: Front Vertical Switch Continuity Table (RH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Lifter switch: 

   Fig 8: Lifter Switch Continuity Table (RH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Reclining switch: 

   Fig 9: Reclining Switch Continuity Table (RH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the front power seat switch LH continuity.

   Slide switch: 

   Fig 10: Slide Switch Continuity Table (LH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Front vertical switch: 

   Fig 11: Front Vertical Switch Continuity Table (LH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Lifter switch: 

   Fig 12: Lifter Switch Continuity Table (LH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Reclining switch: 

   Fig 13: Reclining Switch Continuity Table (LH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPLACE FRONT POWER SEAT SWITCH RH 
2. OK: Go to next step. 

1. Using the hand held tester, check the power seat operation by the active test.

   Standard: 

   SEAT ECU 

   Fig 14: Power Seat Operation Condition Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. OK: REPAIR OR REPLACE HARNESS AND CONNECTOR 
2. NG: Go to next step. 

1. Inspect the motor with a malfunctioning part detected by an active test.
   1. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1 and check that the motor turns clockwise.
   2. Reverse the polarity and check that the motor turns counterclockwise.

      HINT:

      If operation is not as specified, replace the motor.

      Fig 15: Inspecting Power Seat Motor Assy

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPLACE POWER SEAT MOTOR ASSY 
2. OK: REPAIR OR REPLACE HARNESS AND CONNECTOR 

1. Using the hand held tester, check the power seat switch condition by the ECU data monitor.

   SEAT ECU 

   Fig 16: Power Seat Switch Condition Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. When only the lumbar support has a malfunction, proceed to A.
3. When no malfunction exists in all the items or all the items except the lumbar support, proceed to B.

1. B: REPLACE FRONT POWER SEAT SWITCH RH 
2. A: Go to next step. 

1. Inspect the front power seat switch continuity.
   Fig 17: Inspecting Lumbar Front Power Seat Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Lumbar switch: 

   Fig 18: Lumbar Front Power Seat Switch Continuity Table

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPLACE FRONT POWER SEAT SWITCH LH 
2. OK: REPAIR OR REPLACE HARNESS AND CONNECTOR