Toyota Venza: Terminals Of Ecu

Toyota Venza Service Manual / Seat / Front Power Seat Control System(w/ Memory) / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY

(a) Disconnect the T10 and T11 position control ECU and switch assembly connectors.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
T10-1 (GND) - Body ground	W - Body ground	Ground	Always	Below 1 Ω
T11-4 (DBCL) - T10-1 (GND)	L - W	Driver seat belt buckle switch signal	Driver seat belt fastened	Below 1 Ω
T11-4 (DBCL) - T10-1 (GND)	L - W	Driver seat belt buckle switch signal	Driver seat belt unfastened	10 kΩ or higher
T10-6 (+B) - T10-1 (GND)	L - W	Power source	Always	11 to 14 V
T11-12 (SYSB) - T10-1 (GND)	W - W	System power source	Always	11 to 14 V

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

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
T10-2 (SLD+) - T10-1 (GND)	Y - W	Sliding motor signal (forward)	Slide switch off	Below 1 V
T10-2 (SLD+) - T10-1 (GND)	Y - W	Sliding motor signal (forward)	Slide switch on (Forward)	11 to 14 V
T10-4 (SLD-) - T10-1 (GND)	G - W	Sliding motor signal (rearward)	Slide switch off	Below 1 V
T10-4 (SLD-) - T10-1 (GND)	G - W	Sliding motor signal (rearward)	Slide switch on (Rearward)	11 to 14 V
T10-7 (FRV+) - T10-1 (GND)	GR - W	Front vertical motor signal (upward)	Front vertical switch off	Below 1 V
T10-7 (FRV+) - T10-1 (GND)	GR - W	Front vertical motor signal (upward)	Front vertical switch on (Upward)	11 to 14 V
T10-5 (FRV-) - T10-1 (GND)	LG - W	Front vertical motor signal (downward)	Front vertical switch off	Below 1 V
T10-5 (FRV-) - T10-1 (GND)	LG - W	Front vertical motor signal (downward)	Front vertical switch on (Downward)	11 to 14 V
T10-8 (LFT+) - T10-1 (GND)	SB - W	Lifter motor signal (upward)	Lifter switch off	Below 1 V
T10-8 (LFT+) - T10-1 (GND)	SB - W	Lifter motor signal (upward)	Lifter switch on (Upward)	11 to 14 V
T10-11 (LFT-) - T10-1 (GND)	P - W	Lifter motor signal (downward)	Lifter switch off	Below 1 V
T10-11 (LFT-) - T10-1 (GND)	P - W	Lifter motor signal (downward)	Lifter switch on (Downward)	11 to 14 V
T10-9 (RCL+) - T10-1 (GND)	L - W	Reclining motor signal (forward)	Reclining switch off	Below 1 V
T10-9 (RCL+) - T10-1 (GND)	L - W	Reclining motor signal (forward)	Reclining switch on (Forward)	11 to 14 V
T10-12 (RCL-) - T10-1 (GND)	R - W	Reclining motor signal (rearward)	Reclining switch off	Below 1 V
T10-12 (RCL-) - T10-1 (GND)	R - W	Reclining motor signal (rearward)	Reclining switch on (Rearward)	11 to 14 V

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

2. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY LH

(a) Disconnect the I13 outer mirror control ECU assembly LH connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
I13-7 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
I13-14 (BDR) - I13-7 (GND)	V - W-B	Power source	Always	11 to 14 V
I13-5 (SIG) - I13-7 (GND)	L - W-B	Power source (IG)	Ignition switch off	Below 1 V
I13-5 (SIG) - I13-7 (GND)	L - W-B	Power source (IG)	Ignition switch ON	11 to 14 V
I13-6 (CPUB) - I13-7 (GND)	LG - W-B	Power source	Always	11 to 14 V

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

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
I13-3 (M2) - I13-13 (MSWE)	V - Y	M2 switch signal for seat memory switch	M2 switch on	Below 1 V
I13-3 (M2) - I13-13 (MSWE)	V - Y	M2 switch signal for seat memory switch	M2 switch off	11 to 14 V
I13-2 (M1) - I13-13 (MSWE)	B - Y	M1 switch signal for seat memory switch	M1 switch on	Below 1 V
I13-2 (M1) - I13-13 (MSWE)	B - Y	M1 switch signal for seat memory switch	M1 switch off	11 to 14 V
I13-1 (MM) - I13-13 (MSWE)	GR - Y	SET switch signal for seat memory switch	SET switch on	Below 1 V
I13-1 (MM) - I13-13 (MSWE)	GR - Y	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 LH may have a malfunction.

3. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the main body ECU (driver side junction block assembly) connectors.

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

HINT:

Measure values on the wire harness side with the connectors disconnected.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
D50-24 (DCTY) - Body ground	V - Body ground	Driver side door courtesy light switch input	Driver side door closed (OFF) → open (ON)	10 kΩ or higher → Below 1 Ω
2A-1 (ACC) - Body ground	B - Body ground	Ignition power supply (ACC signal)	Ignition switch ACC → OFF	11 to 14 V → Below 1 V
2A-1 (IG) - Body ground	B - Body ground	Ignition power supply (IG signal)	Ignition switch ON → OFF	11 to 14 V → Below 1 V
2C-30 (ALTB) - Body ground	BR - Body ground	+B (power system alternator system) power supply	Always	11 to 14 V
2F-16 (GND1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
2C-24 (BECU) - Body ground	L - Body ground	+B power supply	Always	11 to 14 V

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

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