FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) TERMINALS OF ECU

CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY

for LHD:

Disconnect the X4 and X5 connectors from the position control ECU and switch assembly.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
X4-2 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
X4-7 (+B) - X4-2 (GND)	W - W-B	Power source	Power switch off	11 to 14 V
X5-12 (SYSB) - X4-2 (GND)	P - W-B	System power source	Power switch off	11 to 14 V

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

Reconnect the X4 and X5 connectors to the position control ECU and switch assembly.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
X4-6 (+B2) - X4-1 (GND2)	SB - W-B	Lumbar support adjuster power source	Power switch off	11 to 14 V
X4-1 (GND2) - Body ground	W-B - Body ground	Lumbar support adjuster ground	Always	Below 1 Ω
X4-3 (SLD+) - X4-2 (GND)	L - W-B	Sliding motor signal (forward)	Slide switch off	Below 1 V
X4-3 (SLD+) - X4-2 (GND)	L - W-B	Sliding motor signal (forward)	Slide switch on (Forward)	11 to 14 V
X4-4 (SLD-) - X4-2 (GND)	GR - W-B	Sliding motor signal (rearward)	Slide switch off	Below 1 V
X4-4 (SLD-) - X4-2 (GND)	GR - W-B	Sliding motor signal (rearward)	Slide switch on (Rearward)	11 to 14 V
X4-5 (FRV-) - X4-2 (GND)	R - W-B	Front vertical motor signal (downward)	Front vertical switch off	Below 1 V
X4-5 (FRV-) - X4-2 (GND)	R - W-B	Front vertical motor signal (downward)	Front vertical switch on (Downward)	11 to 14 V
X4-8 (FRV+) - X4-2 (GND)	B - W-B	Front vertical motor signal (upward)	Front vertical switch off	Below 1 V
X4-8 (FRV+) - X4-2 (GND)	B - W-B	Front vertical motor signal (upward)	Front vertical switch on (Upward)	11 to 14 V
X4-9 (RCL+) - X4-2 (GND)	P - W-B	Reclining motor signal (forward)	Reclining switch off	Below 1 V
X4-9 (RCL+) - X4-2 (GND)	P - W-B	Reclining motor signal (forward)	Reclining switch on (Forward)	11 to 14 V
X4-11 (RCL-) - X4-2 (GND)	LG - W-B	Reclining motor signal (rearward)	Reclining switch off	Below 1 V
X4-11 (RCL-) - X4-2 (GND)	LG - W-B	Reclining motor signal (rearward)	Reclining switch on (Rearward)	11 to 14 V
X4-10 (LFT+) - X4-2 (GND)	V - W-B	Lifter motor signal (upward)	Lifter switch off	Below 1 V
X4-10 (LFT+) - X4-2 (GND)	V - W-B	Lifter motor signal (upward)	Lifter switch on (Upward)	11 to 14 V
X4-12 (LFT-) - X4-2 (GND)	G - W-B	Lifter motor signal (downward)	Lifter switch off	Below 1 V
X4-12 (LFT-) - X4-2 (GND)	G - W-B	Lifter motor signal (downward)	Lifter switch on (Downward)	11 to 14 V
X5-1 (SGND) - X4-2 (GND)	BR - W-B	Position sensor ground	Always	Below 1 Ω
X5-3 (SSFV) - X5-1 (SGND)	R - BR	Front vertical position signal	Front vertical function operating	4.5 to 4.8 V
X5-4 (SSRL) - X5-1 (SGND)	P - BR	Lifter position signal	Lifter function operating	4.5 to 4.8 V
X5-5 (SSRS) - X5-1 (SGND)	G- BR	Slide position signal	Slide function operating	4.5 to 4.8 V
X5-11 (SSRR) - X5-1 (SGND)	V - BR	Reclining position signal	Reclining function operating	4.5 to 4.8 V

If the result is not as specified, the position control ECU and switch assembly may have a malfunction.

for RHD:

Disconnect the W3 and W4 connectors from the position control ECU and switch assembly.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
W3-2 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
W3-7 (+B) - W3-2 (GND)	W - W-B	Power source	Power switch off	11 to 14 V
W4-12 (SYSB) - W3-2 (GND)	P - W-B	System power source	Power switch off	11 to 14 V

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

Reconnect the W3 and W4 connectors to the position control ECU and switch assembly.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
W3-6 (+B2) - W3-1 (GND2)	SB - W-B	Lumbar support adjuster power source	Power switch off	11 to 14 V
W3-1 (GND2) - Body ground	W-B - Body ground	Lumbar support adjuster ground	Always	Below 1 Ω
W3-3 (SLD+) - W3-2 (GND)	L - W-B	Sliding motor signal (forward)	Slide switch off	Below 1 V
W3-3 (SLD+) - W3-2 (GND)	L - W-B	Sliding motor signal (forward)	Slide switch on (Forward)	11 to 14 V
W3-4 (SLD-) - W3-2 (GND)	GR - W-B	Sliding motor signal (rearward)	Slide switch off	Below 1 V
W3-4 (SLD-) - W3-2 (GND)	GR - W-B	Sliding motor signal (rearward)	Slide switch on (Rearward)	11 to 14 V
W3-5 (FRV-) - W3-2 (GND)	R - W-B	Front vertical motor signal (downward)	Front vertical switch off	Below 1 V
W3-5 (FRV-) - W3-2 (GND)	R - W-B	Front vertical motor signal (downward)	Front vertical switch on (Downward)	11 to 14 V
W3-8 (FRV+) - W3-2 (GND)	B - W-B	Front vertical motor signal (upward)	Front vertical switch off	Below 1 V
W3-8 (FRV+) - W3-2 (GND)	B - W-B	Front vertical motor signal (upward)	Front vertical switch on (Upward)	11 to 14 V
W3-9 (RCL+) - W3-2 (GND)	P - W-B	Reclining motor signal (forward)	Reclining switch off	Below 1 V
W3-9 (RCL+) - W3-2 (GND)	P - W-B	Reclining motor signal (forward)	Reclining switch on (Forward)	11 to 14 V
W3-11 (RCL-) - W3-2 (GND)	LG - W-B	Reclining motor signal (rearward)	Reclining switch off	Below 1 V
W3-11 (RCL-) - W3-2 (GND)	LG - W-B	Reclining motor signal (rearward)	Reclining switch on (Rearward)	11 to 14 V
W3-10 (LFT+) - W3-2 (GND)	V - W-B	Lifter motor signal (upward)	Lifter switch off	Below 1 V
W3-10 (LFT+) - W3-2 (GND)	V - W-B	Lifter motor signal (upward)	Lifter switch on (Upward)	11 to 14 V
W3-12 (LFT-) - W3-2 (GND)	G - W-B	Lifter motor signal (downward)	Lifter switch off	Below 1 V
W3-12 (LFT-) - W3-2 (GND)	G - W-B	Lifter motor signal (downward)	Lifter switch on (Downward)	11 to 14 V
W4-1 (SGND) - W3-2 (GND)	BR - W-B	Position sensor round	Always	Below 1 Ω
W4-3 (SSFV) - W4-1 (SGND)	R - BR	Front vertical position signal	Front vertical function operating	4.5 to 4.8 V
W4-4 (SSRL) - W4-1 (SGND)	P - BR	Lifter position signal	Lifter function operating	4.5 to 4.8 V
W4-5 (SSRS) - W4-1 (SGND)	G- BR	Slide position signal	Slide function operating	4.5 to 4.8 V
W4-11 (SSRR) - W4-1 (SGND)	V - BR	Reclining position signal	Reclining function operating	4.5 to 4.8 V

If the result is not as specified, the position control ECU and switch assembly may have a malfunction.

CHECK OUTER MIRROR CONTROL ECU ASSEMBLY (for Driver Side)

for LHD:

Disconnect the K7 connector from the outer mirror control ECU assembly (for driver side).

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
K7-7 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
K7-14 (BDR) - K7-7 (GND)	L - W-B	Power source	Power switch off	11 to 14 V
K7-5 (SIG) - K7-7 (GND)	Y - W-B	Power source (IG)	Power switch off	Below 1 V
K7-5 (SIG) - K7-7 (GND)	Y - W-B	Power source (IG)	Power switch on (IG)	11 to 14 V
K7-6 (CPUB) - K7-7 (GND)	LG - W-B	Power source	Power switch off	11 to 14 V

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

Reconnect the K7 connector to the outer mirror control ECU assembly (for driver side).

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
K7-4 (M3) - K7-13 (MSWE)	G - W	M3 switch signal for seat memory switch	M3 switch on	Below 1 V
K7-4 (M3) - K7-13 (MSWE)	G - W	M3 switch signal for seat memory switch	M3 switch off	11 to 14 V
K7-3 (M2) - K7-13 (MSWE)	L - W	M2 switch signal for seat memory switch	M2 switch on	Below 1 V
K7-3 (M2) - K7-13 (MSWE)	L - W	M2 switch signal for seat memory switch	M2 switch off	11 to 14 V
K7-2 (M1) - K7-13 (MSWE)	R - W	M1 switch signal for seat memory switch	M1 switch on	Below 1 V
K7-2 (M1) - K7-13 (MSWE)	R - W	M1 switch signal for seat memory switch	M1 switch off	11 to 14 V
K7-1 (MM) - K7-13 (MSWE)	SB - W	SET switch signal for seat memory switch	SET switch on	Below 1 V
K7-1 (MM) - K7-13 (MSWE)	SB - W	SET switch signal for seat memory switch	SET switch off	11 to 14 V

If the result is not as specified, the outer mirror control ECU assembly (for driver side) may have a malfunction.

for RHD:

Disconnect the J8 connector from the outer mirror control ECU assembly (for driver side).

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
J8-7 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
J8-14 (BDR) - J8-7 (GND)	L - W-B	Power source	Power switch off	11 to 14 V
J8-5 (SIG) - J8-7 (GND)	Y - W-B	Power source (IG)	Power switch off	Below 1 V
J8-5 (SIG) - J8-7 (GND)	Y - W-B	Power source (IG)	Power switch on (IG)	11 to 14 V
J8-6 (CPUB) - J8-7 (GND)	LG - W-B	Power source	Power switch off	11 to 14 V

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

Reconnect the J8 connector to the outer mirror control ECU assembly (for driver side).

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
J8-4 (M3) - J8-13 (MSWE)	G - W	M3 switch signal for seat memory switch	M3 switch on	Below 1 V
J8-4 (M3) - J8-13 (MSWE)	G - W	M3 switch signal for seat memory switch	M3 switch off	11 to 14 V
J8-3 (M2) - J8-13 (MSWE)	R - W	M2 switch signal for seat memory switch	M2 switch on	Below 1 V
J8-3 (M2) - J8-13 (MSWE)	R - W	M2 switch signal for seat memory switch	M2 switch off	11 to 14 V
J8-2 (M1) - J8-13 (MSWE)	V - W	M1 switch signal for seat memory switch	M1 switch on	Below 1 V
J8-2 (M1) - J8-13 (MSWE)	V - W	M1 switch signal for seat memory switch	M1 switch off	11 to 14 V
J8-1 (MM) - J8-13 (MSWE)	SB - W	SET switch signal for seat memory switch	SET switch on	Below 1 V
J8-1 (MM) - J8-13 (MSWE)	SB - W	SET switch signal for seat memory switch	SET switch off	11 to 14 V

If the result is not as specified, the outer mirror control ECU assembly (for driver side) may have a malfunction.

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Disconnect the 2C, 2E*1, 2F*2 and 2B connectors from the instrument panel junction block assembly.

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
2C-18 - Body ground	B - Body ground	Power source	Power switch off	11 to 14 V
2E-1 - Body ground1 2F-1 - Body ground2	W - Body ground	Power source (IG)	Power switch off	11 to 14 V
2B-6 - Body ground	W-B - Body ground	Body ground	Always	Below 1 Ω

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

2C-18 - Body ground

B - Body ground

Power source

Power switch off

11 to 14 V

2E-1 - Body ground*1

2F-1 - Body ground*2

W - Body ground

Power source (IG)

Power switch off

11 to 14 V

2B-6 - Body ground

W-B - Body ground

Body ground

Always

Below 1 Ω

*1: for LHD
*2: for RHD

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

Reconnect the 2C, 2E and 2B instrument panel junction block assembly connectors.

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
2D-35 (FLCY) - Body ground*1	BR - Body ground	Front door courtesy light switch assembly signal	Driver door closed	11 to 14 V
2D-35 (FLCY) - Body ground*1	BR - Body ground	Front door courtesy light switch assembly signal	Driver door open	Below 1 V
2D-36 (FRCY) - Body ground*2	BR - Body ground	Front door courtesy light switch assembly signal	Driver door closed	11 to 14 V
2D-36 (FRCY) - Body ground*2	BR - Body ground	Front door courtesy light switch assembly signal	Driver door open	Below 1 V

*1: for LHD
*2: for RHD