Inspection Procedure

FUNCTION CHECK
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 a part of the functions operates normally, proceed to "B".
1. B: GO TO STEP 7
2. A: GO TO NEXT STEP.
CHECK FUSES
1. Check whether both fuses of D-SEAT and P-SEAT operate normally.
1. NG: REPLACE FUSES
2. OK: GO TO NEXT STEP.

CHECK SOURCE VOLTAGE

Disconnect the powerseat ECU connector and connect the seat wire harness to the floor wire harness.
Inspect the connector on the wire harness side.

Fig 1: Checking Source Voltage Connector P21 & P22

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TESTER CONNECTION CHART

Tester connection	Condition	Specified condition
P21-8 <--> Ground	IG SW ON	10-14 V
P22-8 <--> Ground	Constant	10-14 V
P21-9 <--> Ground	Constant	10-14 V

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

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: GO TO NEXT STEP.

CHECK CONTINUITY

Disconnect the seat ECU connector and connect the seat wire harness to the floor wire harness.
Inspect the connector on the wire harness side.

Fig 2: Checking Continuity Connector P21 & P22

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TESTER CONNECTION CHART

Tester connection	Condition	Specified condition
P22-7 <--> Ground	Constant	Continuity

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

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: GO TO NEXT STEP.

FRONT POWER SEAT SWITCH RH

Inspect the front power seat switch RH continuity.

Slide switch :

TESTER CONNECTION CHART

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

Front vertical switch:

TESTER CONNECTION CHART

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

Lifter switch:

TESTER CONNECTION CHART

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

Reclining switch:

TESTER CONNECTION CHART

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

Inspect the front power seat switch LH continuity.

Slide switch:

TESTER CONNECTION CHART

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

Fig 3: Inspecting Front Power Seat Switch RH Continuity

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Front vertical switch:

TESTER CONNECTION CHART

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

Lifter switch:

TESTER CONNECTION CHART

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

Reclining switch:

TESTER CONNECTION CHART

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

NG: REPLACE FRONT POWER SEAT SWITCH RH
OK: GO TO NEXT STEP.

INSPECT POWER SEAT MOTOR ASSY
1. Inspect the motor with a malfunctioning part.
  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.
  Fig 4: Inspecting Power Seat Motor Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE: If operation is not as specified, replace the motor.
1. OK: REPAIR OR REPLACE HARNESS AND CONNECTOR
2. NG: REPLACE POWER SEAT MOTOR ASSY

INSPECT LUMBAR FRONT POWER SEAT SWITCH

Inspect the front power seat switch continuity.

Lumbar switch:

TESTER CONNECTION CHART

Switch position	Tester connection	Specified condition
FRONT	1 <--> 3 1 <--> 4	Continuity
BACK	2 <--> 3 2 <--> 4	Continuity

Fig 5: Inspecting Front Power Seat Switch Continuity

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