FRONT POWER SEAT CONTROL SYSTEM TERMINALS OF ECU

CHECK POSITION CONTROL ECU (for LHD)

Disconnect the O26 and O27 ECU connectors.

Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
O26-1 (SYSB) - Body ground	R - Body ground	System power source	Always	11 to 14 V
O26-21 (GND2) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
O27-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
O27-5 (+B) - Body ground	L - Body ground	Power source	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

Reconnect the O26 and O27 ECU connectors.

Measure the voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
O26-3 (PVCC) - O27-1 (GND)	GR - W-B	Reclining position sensor power supply	Power seat operation	5.5 to 6.5 V
O26-5 (SSRR) - O27-1 (GND)	P - W-B	Reclining position signal	Reclining operation	0 to 6.5 V
O26-6 (SSRS) - O27-1 (GND)	LG - W-B	Sliding position signal	Sliding operation	0 to 6.5 V
O26-7 (SSFV) - O27-1 (GND)	B - W-B	Front vertical position signal	Front vertical operation	0 to 6.5 V
O26-8 (SSRL) - O27-1 (GND)	GR - W-B	Lifter position signal	Lifter operation	0 to 6.5 V
O26-9 (SLDF) - O27-1 (GND)	SB - W-B	Power seat switch signal	Sliding switch (forward) off	11 to 14 V
O26-9 (SLDF) - O27-1 (GND)	SB - W-B	Power seat switch signal	Sliding switch (forward) on	Below 1 V
O26-10 (SLDR) - O27-1 (GND)	LG - W-B	Power seat switch signal	Sliding switch (rearward) off	11 to 14 V
O26-10 (SLDR) - O27-1 (GND)	LG - W-B	Power seat switch signal	Sliding switch (rearward) on	Below 1 V
O26-11 (RCLF) - O27-1 (GND)	G - W-B	Power seat switch signal	Reclining switch (forward) off	11 to 14 V
O26-11 (RCLF) - O27-1 (GND)	G - W-B	Power seat switch signal	Reclining switch (forward) on	Below 1 V
O26-12 (RCLR) - O27-1 (GND)	GR - W-B	Power seat switch signal	Reclining switch (rearward) off	11 to 14 V
O26-12 (RCLR) - O27-1 (GND)	GR - W-B	Power seat switch signal	Reclining switch (rearward) on	Below 1 V
O26-13 (FUP) - O27-1 (GND)	R - W-B	Power seat switch signal	Front vertical switch (upward) off	11 to 14 V
O26-13 (FUP) - O27-1 (GND)	R - W-B	Power seat switch signal	Front vertical switch (upward) on	Below 1 V
O26-14 (FDWN) - O27-1 (GND)	L - W-B	Power seat switch signal	Front vertical switch (downward) off	11 to 14 V
O26-14 (FDWN) - O27-1 (GND)	L - W-B	Power seat switch signal	Front vertical switch (downward) on	Below 1 V
O26-15 (LUP) - O27-1 (GND)	W - W-B	Power seat switch signal	Lifter switch (upward) off	11 to 14 V
O26-15 (LUP) - O27-1 (GND)	W - W-B	Power seat switch signal	Lifter switch (upward) on	Below 1 V
O26-16 (LDWN) - O27-1 (GND)	V - W-B	Power seat switch signal	Lifter switch (downward) off	11 to 14 V
O26-16 (LDWN) - O27-1 (GND)	V - W-B	Power seat switch signal	Lifter switch (downward) on	Below 1 V
O26-23 (PVCC) - O27-1 (GND)	W - W-B	Sliding position sensor power supply	Power seat operation	5.5 to 6.5 V
O26-24 (PVCC) - O27-1 (GND)	L - W-B	Front vertical position sensor power supply	Power seat operation	5.5 to 6.5 V
O26-25 (PVCC) - O27-1 (GND)	V - W-B	Lifter position sensor power supply	Power seat operation	5.5 to 6.5 V
O27-2 (SLD+) - O27-1 (GND)	B - W-B	Slide motor signal (forward)	Seat moving forward using sliding switch	11 to 14 V
O27-2 (SLD+) - O27-1 (GND)	B - W-B	Slide motor signal (forward)	Other	Below 1 V
O27-3 (SLD-) - O27-1 (GND)	P - W-B	Slide motor signal (rearward)	Seat moving rearward using sliding switch	11 to 14 V
O27-3 (SLD-) - O27-1 (GND)	P - W-B	Slide motor signal (rearward)	Other	Below 1 V
O27-4 (FRV-) - O27-1 (GND)	G - W-B	Front vertical motor signal (downward)	Seat cushion front portion lowering using front vertical switch	11 to 14 V
O27-4 (FRV-) - O27-1 (GND)	G - W-B	Front vertical motor signal (downward)	Other	Below 1 V
O27-6 (FRV+) - O27-1 (GND)	R - W-B	Front vertical motor signal (upward)	Seat cushion front portion rising using front vertical switch	11 to 14 V
O27-6 (FRV+) - O27-1 (GND)	R - W-B	Front vertical motor signal (upward)	Other	Below 1 V
O27-7 (LFT+) - O27-1 (GND)	SB - W-B	Lifter motor signal (upward)	Seat rising using lifter switch	11 to 14 V
O27-7 (LFT+) - O27-1 (GND)	SB - W-B	Lifter motor signal (upward)	Other	Below 1 V
O27-8 (RCL+) - O27-1 (GND)	LG - W-B	Reclining motor signal (forward)	Seatback moving forward using reclining switch	11 to 14 V
O27-8 (RCL+) - O27-1 (GND)	LG - W-B	Reclining motor signal (forward)	Other	Below 1 V
O27-9 (LFT-) - O27-1 (GND)	W - W-B	Lifter motor signal (downward)	Seat lowering using lifter switch	11 to 14 V
O27-9 (LFT-) - O27-1 (GND)	W - W-B	Lifter motor signal (downward)	Other	Below 1 V
O27-10 (RCL-) - O27-1 (GND)	V - W-B	Reclining motor signal (rearward)	Seatback moving rearward using reclining switch	11 to 14 V
O27-10 (RCL-) - O27-1 (GND)	V - W-B	Reclining motor signal (rearward)	Other	Below 1 V

If the result is not as specified, the ECU may have a malfunction.

CHECK POSITION CONTROL ECU (for RHD)

Disconnect the O16 and O17 ECU connectors.

Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
O16-1 (SYSB) - Body ground	R - Body ground	System power source	Always	11 to 14 V
O16-21 (GND2) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
O17-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
O17-5 (+B) - Body ground	L - Body ground	Power source	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

Reconnect the O16 and O17 ECU connectors.

Measure the voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
O16-3 (PVCC) - O17-1 (GND)	GR - W-B	Reclining position sensor power supply	Power seat operation	5.5 to 6.5 V
O16-5 (SSRR) - O17-1 (GND)	P - W-B	Reclining position signal	Reclining operation	0 to 6.5 V
O16-6 (SSRS) - O17-1 (GND)	LG - W-B	Sliding position signal	Sliding operation	0 to 6.5 V
O16-7 (SSFV) - O17-1 (GND)	B - W-B	Front vertical position signal	Front vertical operation	0 to 6.5 V
O16-8 (SSRL) - O17-1 (GND)	GR - W-B	Lifter position signal	Lifter operation	0 to 6.5 V
O16-9 (SLDF) - O17-1 (GND)	SB - W-B	Power seat switch signal	Sliding switch (forward) off	11 to 14 V
O16-9 (SLDF) - O17-1 (GND)	SB - W-B	Power seat switch signal	Sliding switch (forward) on	Below 1 V
O16-10 (SLDR) - O17-1 (GND)	LG - W-B	Power seat switch signal	Sliding switch (rearward) off	11 to 14 V
O16-10 (SLDR) - O17-1 (GND)	LG - W-B	Power seat switch signal	Sliding switch (rearward) on	Below 1 V
O16-11 (RCLF) - O17-1 (GND)	G - W-B	Power seat switch signal	Reclining switch (forward) off	11 to 14 V
O16-11 (RCLF) - O17-1 (GND)	G - W-B	Power seat switch signal	Reclining switch (forward) on	Below 1 V
O16-12 (RCLR) - O17-1 (GND)	GR - W-B	Power seat switch signal	Reclining switch (rearward) off	11 to 14 V
O16-12 (RCLR) - O17-1 (GND)	GR - W-B	Power seat switch signal	Reclining switch (rearward) on	Below 1 V
O16-13 (FUP) - O17-1 (GND)	R - W-B	Power seat switch signal	Front vertical switch (upward) off	11 to 14 V
O16-13 (FUP) - O17-1 (GND)	R - W-B	Power seat switch signal	Front vertical switch (upward) on	Below 1 V
O16-14 (FDWN) - O17-1 (GND)	L - W-B	Power seat switch signal	Front vertical switch (downward) off	11 to 14 V
O16-14 (FDWN) - O17-1 (GND)	L - W-B	Power seat switch signal	Front vertical switch (downward) on	Below 1 V
O16-15 (LUP) - O17-1 (GND)	W - W-B	Power seat switch signal	Lifter switch (upward) off	11 to 14 V
O16-15 (LUP) - O17-1 (GND)	W - W-B	Power seat switch signal	Lifter switch (upward) on	Below 1 V
O16-16 (LDWN) - O17-1 (GND)	V - W-B	Power seat switch signal	Lifter switch (downward) off	11 to 14 V
O16-16 (LDWN) - O17-1 (GND)	V - W-B	Power seat switch signal	Lifter switch (downward) on	Below 1 V
O16-23 (PVCC) - O17-1 (GND)	W - W-B	Sliding position sensor power supply	Power seat operation	5.5 to 6.5 V
O16-24 (PVCC) - O17-1 (GND)	L - W-B	Front vertical position sensor power supply	Power seat operation	5.5 to 6.5 V
O16-25 (PVCC) - O17-1 (GND)	V - W-B	Lifter position sensor power supply	Power seat operation	5.5 to 6.5 V
O17-2 (SLD+) - O17-1 (GND)	B - W-B	Slide motor signal (forward)	Seat moving forward using sliding switch	11 to 14 V
O17-2 (SLD+) - O17-1 (GND)	B - W-B	Slide motor signal (forward)	Other	Below 1 V
O17-3 (SLD-) - O17-1 (GND)	P - W-B	Slide motor signal (rearward)	Seat moving rearward using sliding switch	11 to 14 V
O17-3 (SLD-) - O17-1 (GND)	P - W-B	Slide motor signal (rearward)	Other	Below 1 V
O17-4 (FRV-) - O17-1 (GND)	G - W-B	Front vertical motor signal (downward)	Seat cushion front portion lowering using front vertical switch	11 to 14 V
O17-4 (FRV-) - O17-1 (GND)	G - W-B	Front vertical motor signal (downward)	Other	Below 1 V
O17-6 (FRV+) - O17-1 (GND)	R - W-B	Front vertical motor signal (upward)	Seat cushion front portion rising using front vertical switch	11 to 14 V
O17-6 (FRV+) - O17-1 (GND)	R - W-B	Front vertical motor signal (upward)	Other	Below 1 V
O17-7 (LFT+) - O17-1 (GND)	SB - W-B	Lifter motor signal (upward)	Seat rising using lifter switch	11 to 14 V
O17-7 (LFT+) - O17-1 (GND)	SB - W-B	Lifter motor signal (upward)	Other	Below 1 V
O17-8 (RCL+) - O17-1 (GND)	LG - W-B	Reclining motor signal (forward)	Seatback moving forward using reclining switch	11 to 14 V
O17-8 (RCL+) - O17-1 (GND)	LG - W-B	Reclining motor signal (forward)	Other	Below 1 V
O17-9 (LFT-) - O17-1 (GND)	W - W-B	Lifter motor signal (downward)	Seat lowering using lifter switch	11 to 14 V
O17-9 (LFT-) - O17-1 (GND)	W - W-B	Lifter motor signal (downward)	Other	Below 1 V
O17-10 (RCL-) - O17-1 (GND)	V - W-B	Reclining motor signal (rearward)	Seatback moving rearward using reclining switch	11 to 14 V
O17-10 (RCL-) - O17-1 (GND)	V - W-B	Reclining motor signal (rearward)	Other	Below 1 V

If the result is not as specified, the ECU may have a malfunction.