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: Locating ECU Connector (Wire Harness Side)

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 2: Locating Wire Harness Side ECU Connector

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.

   Slide switch: 

   SLIDE SWITCH CONTINUITY CONDITION
   
   

   Switch position	Tester connection	Specified condition
   FRONT	1 <--> 9	Continuity
   BACK	1 <--> 6	Continuity

   Front vertical switch: 

   FRONT VERTICAL SWITCH CONTINUITY CONDITION
   
   

   Switch position	Tester connection	Specified condition
   Up	1 <--> 10	Continuity
   Down	1 <--> 5	Continuity

   Lifter switch: 

   LIFTER SWITCH CONTINUITY CONDITION
   
   

   Switch position	Tester connection	Specified condition
   Up	1 <--> 7	Continuity
   Down	1 <--> 8	Continuity

   Reclining switch: 

   RECLINING SWITCH CONTINUITY CONDITION
   
   

   Switch position	Tester connection	Specified condition
   FORWARD	1 <--> 3	Continuity
   REAR	1 <--> 2	Continuity

   Fig 3: Inspecting Front Power Seat Switch

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

   Slide switch: 

   SLIDE SWITCH CONTINUITY CONDITION
   
   

   Switch position	Tester connection	Specified condition
   FRONT	1 <--> 9	Continuity
   BACK	1 <--> 6	Continuity

   Front vertical switch: 

   FRONT VERTICAL SWITCH CONTINUITY CONDITION
   
   

   Switch position	Tester connection	Specified condition
   Up	1 <--> 5	Continuity
   Down	1 <--> 10	Continuity

   Lifter switch: 

   LIFTER SWITCH CONTINUITY CONDITION
   
   

   Switch position	Tester connection	Specified condition
   Up	1 <--> 8	Continuity
   Down	1 <--> 7	Continuity

   Reclining switch: 

   RECLINING SWITCH CONTINUITY CONDITION
   
   

   Switch position	Tester connection	Specified condition
   FORWARD	1 <--> 3	Continuity
   REAR	1 <--> 2	Continuity

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 

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.

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

Fig 4: Inspecting Power Seat Motor Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   SEAT ECU 

   POWER SEAT SWITCH CONDITION
   
   

   Item	Condition	Standard value
   SLIDE SW FRONT	SLIDE SEAT SW CENTER --> FRONT	ON/OFF
   SLIDE SW REAR	SLIDE SEAT SW CENTER --> REAR	ON/OFF
   R VTCL SW UP	REAR SW CENTER --> UP	ON/OFF
   R VTCL SW DOWN	REAR SW CENTER --> DOWN	ON/OFF
   FVTCLSWUP	REAR SW CENTER --> UP	ON/OFF
   F VTCL SW DOWN	REAR SW CENTER --> DOWN	ON/OFF
   RECLIN SW FRONT	RECLINING SW CENTER --> FRONT	ON/OFF
   RECLIN SW REAR	RECLINING SW CENTER --> REAR	ON/OFF

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.

Lumbar switch: 

Fig 5: Inspecting Lumbar Front Power Seat Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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