SEATS > Power Seat System

1. WIRING DIAGRAM

2. TROUBLE SYMPTOM

• Driver’s side

Symptoms	Criteria
All functions do not operate.	• Power seat switch • Power seat harness • Body harness
A part of function does not operate.	• Power seat switch • Power seat harness • Relevant motor

3. CHECK SWITCH

Move each switch and measure the resistance between connector terminals.

• Power seat switch

4. ALL FUNCTIONS DO NOT OPERATE

STEP	CHECK	YES	NO
1.CHECK SEAT FUNCTION. Operate each power seat switch and check that each power seat function operates normally.	Does all function fails to operate?		Check the motor which does not operate.
2.CHECK FUSE. Check the power seat fuse inside the fuse box.	Is the fuse blown out?	Replace the appropriate fuse.
3.CHECK POWER SUPPLY CIRCUIT. 1) Disconnect the power seat switch connector. 2) Measure the voltage between harness connector and chassis ground. Connector & terminal LHD model: (R200) No. 7 (+) — Chassis ground (−): RHD model: (R190) No. 7 (+) — Chassis ground (−):	Is the voltage 10 V or more?		Check body harness.
4.CHECK POWER SUPPLY CIRCUIT. Measure the resistance between power seat switch harness connector and chassis ground. Connector & terminal LHD model: (R200) No. 8 — Chassis ground: RHD model: (R190) No. 8 — Chassis ground:	Is the resistance less than 10 Ω?	Replace the faulty switch assembly.	Check body harness.

5. SOME MOTORS DO NOT OPERATE

• Malfunction of slide operation

STEP	CHECK	YES	NO
1.CHECK SWITCH. 1) Disconnect the connector of power seat switch assembly. 2) Measure the resistance between terminals when moving the switch to slide forward and slide backward.	Is there any problem on the inspection result?		Replace the power seat switch assembly.
2.CHECK HARNESS. 1) Disconnect the power seat switch connector and slide motor connector. 2) Measure the resistance between the power seat switch connector and slide motor connector. Connector & terminal LHD model: (R202) No. 1 — (R200) No. 14: (R202) No. 2 — (R200) No. 13: RHD model: (R192) No. 1 — (R190) No. 14: (R192) No. 2 — (R190) No. 13:	Is the resistance less than 10 Ω?		Check power seat harness.
3.CHECK SLIDE MOTOR. 1) Connect the power seat switch connector and slide motor connector. 2) Apply 12 V voltage to the slide motor and check the motor rotation. Connector & terminal LHD model: (R200) No. 14 (+) — (R200) No. 13 (−): (R200) No. 13 (+) — (R200) No. 14 (−): RHD model: (R190) No. 14 (+) — (R190) No. 13 (−): (R190) No. 13 (+) — (R190) No. 14 (−):	Does the motor rotate normally?	Check for temporary poor contact or mechanical trouble in slide rail.	Slide motor problem. Replace the slide rail assembly.

• Malfunction of tilt operation

STEP	CHECK	YES	NO
1.CHECK SWITCH. 1) Disconnect the connector of power seat switch assembly. 2) Measure the resistance between terminals when moving the switch to tilt up and tilt down.	Is there any problem on the inspection result?		Replace the power seat switch assembly.
2.CHECK HARNESS. 1) Disconnect the power seat switch connector and tilt motor connector. 2) Measure the resistance between power seat switch connector and tilt motor connector. Connector & terminal LHD model: (R203) No. 2 — (R200) No. 2: (R203) No. 3 — (R200) No. 1: RHD model: (R193) No. 2 — (R190) No. 2: (R193) No. 3 — (R190) No. 1:	Is the resistance less than 10 Ω?		Check power seat harness.
3.CHECK TILT MOTOR. 1) Connect the power seat switch connector and tilt motor connector. 2) Apply 12 V voltage to the tilt motor and check the motor rotation. Connector & terminal LHD model: (R200) No. 2 (+) — (R200) No. 1 (−): (R200) No. 1 (+) — (R200) No. 2 (−): RHD model: (R190) No. 2 (+) — (R190) No. 1 (−): (R190) No. 1 (+) — (R190) No. 2 (−):	Does the motor rotate normally?	Check for temporary poor contact or mechanical trouble in tilt mechanism.	Tilt motor problem. Replace the slide rail assembly.

• Malfunction of lifter operation

STEP	CHECK	YES	NO
1.CHECK SWITCH. 1) Disconnect the connector of power seat switch assembly. 2) Measure the resistance between terminals when moving the switch to lifter up and lifter down.	Is there any problem on the inspection result?		Replace the power seat switch assembly.
2.CHECK HARNESS. 1) Disconnect the power seat switch connector and lifter motor connector. 2) Measure the resistance between the power seat switch connector and lifter motor connector. Connector & terminal LHD model: (R204) No. 4 — (R200) No. 5: (R204) No. 3 — (R200) No. 6: RHD model: (R194) No. 4 — (R190) No. 5: (R194) No. 3 — (R190) No. 6:	Is the resistance less than 10 Ω?		Check power seat harness.
3.CHECK LIFTER MOTOR. 1) Connect the power seat switch connector and lifter motor connector. 2) Apply 12 V voltage to the lifter motor and check the motor rotation. Connector & terminal LHD model: (R200) No. 5 (+) — (R200) No. 6 (−): (R200) No. 6 (+) — (R200) No. 5 (−): RHD model: (R190) No. 5 (+) — (R190) No. 6 (−): (R190) No. 6 (+) — (R190) No. 5 (−):	Does the motor rotate normally?	Check for temporary poor contact or mechanical trouble in lifter mechanism.	Lifter motor problem. Replace the slide rail assembly.

• Malfunction of reclining operation

STEP	CHECK	YES	NO
1.CHECK SWITCH. 1) Disconnect the connector of power seat switch assembly. 2) Measure the resistance between terminals when moving the switch to reclining forward and reclining backward.	Is there any problem on the inspection result?		Replace the power seat switch assembly.
2.CHECK HARNESS. 1) Disconnect the power seat switch connector and reclining motor connector. 2) Measure the resistance between the power seat switch connector and reclining motor connector. Connector & terminal LHD model: (R201) No. 2 — (R200) No. 3: (R201) No. 1 — (R200) No. 4: RHD model: (R191) No. 2 — (R190) No. 3: (R191) No. 1 — (R190) No. 4:	Is the resistance less than 10 Ω?		Check power seat harness.
3.CHECK RECLINING MOTOR. 1) Connect the power seat switch connector and reclining motor connector. 2) Apply 12 V voltage to the reclining motor and check the motor rotation. Connector & terminal LHD model: (R200) No. 3 (+) — (R200) No. 4 (−): (R200) No. 4 (+) — (R200) No. 3 (−): RHD model: (R190) No. 3 (+) — (R190) No. 4 (−): (R190) No. 4 (+) — (R190) No. 3 (−):	Does the motor rotate normally?	Check for temporary poor contact or mechanical trouble in reclining hinge.	Reclining motor problem. Replace the reclining motor assembly.