Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Some Motors Do Not Operate (Without Memory)
- Slide operation failure
Step Check Yes No 1 CHECK SWITCH. - Disconnect the connector of power seat switch assembly.
- Measure the resistance between connector terminals when moving the switch to slide forward and slide backward. < Ref. to CHECK POWER SEAT SWITCH , INSPECTION, Power Seat System. >
Is there any problem on the inspection result? Go to step 2 . Replace the power seat switch assembly. 2 CHECK HARNESS. - Disconnect the power seat switch connector and slide motor connector.
- Measure the resistance between power seat switch connector and slide motor connector.
Connector & terminal
Driver's seat
(R370) No. 2 - (R369) No. 13:
(R370) No. 1 - (R369) No. 14:
Passenger's seat
(R192) No. 2 - (R190) No. 13:
(R192) No. 1 - (R190) No. 14:
Is the resistance less than 10 Ω? Go to step 3 . Check power seat harness. 3 CHECK SLIDE MOTOR. - Connect the power seat switch connector and slide motor connector.
- Apply 12 V to the slide motor and check the motor rotation.
Connector & terminal
Driver's seat
(R369) No. 13 (+) - (R369) No. 14 (-):
(R369) No. 14 (+) - (R369) No. 13 (-):
Passenger's seat
(R190) No. 13 (+) - (R190) No. 14 (-):
(R190) No. 14 (+) - (R190) No. 13 (-):
Does the motor rotate normally? Check for temporary poor contact or mechanical trouble in slide rail. Slide motor problem. Replace the seat cushion frame assembly. - Malfunction of tilt operation
Step Check Yes No 1 CHECK SWITCH. - Disconnect the connector of power seat switch assembly.
- Measure the resistance between connector terminals when moving the switch to tilt up and tilt down. < Ref. to CHECK POWER SEAT SWITCH , INSPECTION, Power Seat System. >
Is there any problem on the inspection result? Go to step 2 . Replace the power seat switch assembly. 2 CHECK HARNESS. - Disconnect the power seat switch connector and tilt motor connector.
- Measure the resistance between power seat switch connector and tilt motor connector.
Connector & terminal
Driver's seat
(R372) No. 2 - (R369) No. 1:
(R372) No. 1 - (R369) No. 2:
Is the resistance less than 10 Ω? Go to step 3 . Check power seat harness. 3 CHECK TILT MOTOR. - Connect the power seat switch connector and tilt motor connector.
- Apply 12 V to the tilt motor and check the motor rotation.
Connector & terminal
Driver's seat
(R369) No. 1 (+) - (R369) No. 2 (-):
(R369) No. 2 (+) - (R369) No. 1 (-):
Does the motor rotate normally? Check for temporary poor contact or mechanical trouble in tilt mechanism. Tilt motor problem. Replace the seat cushion frame assembly. - Malfunction of lifter operation
Step Check Yes No 1 CHECK SWITCH. - Disconnect the connector of power seat switch assembly.
- Measure the resistance between connector terminals when moving the switch to lifter up and lifter down. < Ref. to CHECK POWER SEAT SWITCH , INSPECTION, Power Seat System. >
Is there any problem on the inspection result? Go to step 2 . Replace the power seat switch assembly. 2 CHECK HARNESS. - Disconnect the power seat switch connector and lifter motor connector.
- Measure the resistance between power seat switch connector and lifter motor connector.
Connector & terminal
Driver's seat
(R371) No. 2 - (R369) No. 6:
(R371) No. 1 - (R369) No. 5:
Is the resistance less than 10 Ω? Go to step 3 . Check power seat harness. 3 CHECK LIFTER MOTOR. - Connect the power seat switch connector and lifter motor connector.
- Apply 12 V voltage to the lifter motor and check the motor rotation.
Connector & terminal
Driver's seat
(R369) No. 6 (+) - (R369) No. 5 (-):
(R369) No. 5 (+) - (R369) No. 6 (-):
Does the motor rotate normally? Check for temporary poor contact or mechanical trouble in lifter mechanism. Lifter motor problem. Replace the seat cushion frame assembly. - Malfunction of reclining operation
Step Check Yes No 1 CHECK SWITCH. - Disconnect the connector of power seat switch assembly.
- Measure the resistance between connector terminals when moving the switch to reclining forward and reclining backward. < Ref. to CHECK POWER SEAT SWITCH , INSPECTION, Power Seat System. >
Is there any problem on the inspection result? Go to step 2 . Replace the power seat switch assembly. 2 CHECK HARNESS. - Disconnect the power seat switch connector and reclining motor connector.
- Measure the resistance between power seat switch connector and reclining motor connector.
Connector & terminal
Driver's seat
(R375) No. 2 - (R369) No. 4:
(R375) No. 1 - (R369) No. 3:
Passenger's seat
(R368) No. 2 - (R190) No. 4:
(R368) No. 1 - (R190) No. 3:
Is the resistance less than 10 Ω? Go to step 3 . Check power seat harness. 3 CHECK RECLINING MOTOR. - Connect the power seat switch connector and reclining motor connector.
- Apply 12 V voltage to the reclining motor and check the motor rotation.
Connector & terminal
Driver's seat
(R369) No. 4 (+) - (R369) No. 3 (-):
(R369) No. 3 (+) - (R369) No. 4 (-):
Passenger's seat
(R190) No. 4 (+) - (R190) No. 3 (-):
(R190) No. 3 (+) - (R190) No. 4 (-):
Does the motor rotate normally? Check for temporary poor contact or mechanical trouble in reclining hinge. Reclining motor problem. Replace the backrest frame assembly. - Malfunction of lumbar operation
Step Check Yes No 1 CHECK SWITCH. - Disconnect the connector of lumbar switch assembly.
- Measure the resistance between connector terminals when moving the switch to lumbar forward and lumbar backward. < Ref. to CHECK LUMBAR SWITCH , INSPECTION, Power Seat System. >
Is there any problem on the inspection result? Go to step 2 . Replace the lumbar switch assembly. 2 CHECK HARNESS. - Disconnect the lumbar switch connector and lumbar motor connector.
- Measure the resistance between lumbar switch connector and lumbar motor connector.
Connector & terminal
Driver's seat
(R379) No. 1 - (R376) No. 4:
(R379) No. 2 - (R376) No. 3:
Is the resistance less than 10 Ω? Go to step 3 . Check power seat harness. 3 CHECK LUMBAR MOTOR. - Connect the lumbar switch connector and lumbar motor connector.
- Apply 12 V voltage to the lumbar motor and check the motor rotation.
Connector & terminal
Driver's seat
(R376) No. 4 (+) - (R376) No. 3 (-):
(R376) No. 3 (+) - (R376) No. 4 (-):
Does the motor rotate normally? Check for temporary poor contact or mechanical trouble in lumbar mechanism. Lumbar motor problem. Replace the backrest frame assembly.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.