Toyota Venza: Terminals Of Ecu

Toyota Venza Service Manual / Seat Belt / Seat Belt Warning System / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK COMBINATION METER ASSEMBLY

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
E2-14 (B) - Body ground	Y - Body ground	Battery power supply	Always	11 to 14 V
E2-13 (IG+) - Body ground	BR - Body ground	Ignition switch power supply	Ignition switch ON	11 to 14 V
E2-13 (IG+) - Body ground	BR - Body ground	Ignition switch power supply	Ignition switch off	Below 1 V
E2-11 (E1) - Body ground	B - Body ground	Ground	Always	Below 1 Ω
E2-24 (ES) - Body ground	W - Body ground	Ground	Always	Below 1 Ω
E1-1 (CANH) - Body ground	LG - Body ground	CAN communication line	Always	200 Ω or higher
E1-9 (CANL) - Body ground	W - Body ground	CAN communication line	Always	200 Ω or higher
E1-5 (P/SB) - Body ground	G - Body ground	Front passenger side seat belt warning light signal	Front passenger side seat occupied, seat belt fastened	11 to 14 V
E1-5 (P/SB) - Body ground	G - Body ground	Front passenger side seat belt warning light signal	Front passenger side seat occupied, seat belt unfastened	Below 1 V

If the result is not as specified, the combination meter assembly may have a malfunction.

2. CHECK ACCESSORY METER ASSEMBLY

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
F2-1 (B) - Body ground	P - Body ground	Battery power supply	Always	11 to 14 V
F2-13 (IG+) - Body ground	L - Body ground	Ignition switch power supply	Ignition switch ON	11 to 14 V
F2-13 (IG+) - Body ground	L - Body ground	Ignition switch power supply	Ignition switch off	Below 1 V
F2-12 (E) - Body ground	B - Body ground	Ground	Always	Below 1 Ω
F2-20 (PBEW) - Body ground	G - Body ground	Front passenger side seat belt warning light signal	Front passenger side seat occupied, seat belt fastened	11 to 14 V
F2-20 (PBEW) - Body ground	G - Body ground	Front passenger side seat belt warning light signal	Front passenger side seat occupied, seat belt unfastened	Below 1 V

If the result is not as specified, the accessory meter assembly may have a malfunction.

3. CHECK CENTER AIRBAG SENSOR ASSEMBLY

Terminal No.	Terminal Symbol	Destination
M28-16	FSR+	Occupant classification ECU
M28-24	FSR-	Occupant classification ECU
L31-10	LBE+	Front seat inner belt assembly (for driver side)
L31-18	LBE-	Front seat inner belt assembly (for driver side)

4. CHECK OCCUPANT CLASSIFICATION ECU

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specification
S12-1 (+B) - S12-3 (GND)1 M14-1 (+B) - M14-3 (GND)2	GR - W-B1 G - W-B2	Battery power supply	Always	10 to 14 V
S12-2 (DIA) - S12-3 (GND)1 M14-2 (DIA) - M14-3 (GND)2	SB - W-B	Diagnosis (DLC3)	Ignition switch ON	Pulse generation
S12-3 (GND) - Body ground1 M14-3 (GND) - Body ground2	W-B - Body ground	Ground	Always	Below 1 V
S12-7 (IG) - S12-3 (GND)1 M14-7 (IG) - M14-3 (GND)2	V - W-B	Ignition switch power supply	Ignition switch ON	10 to 14 V
S12-8 (FSR+) - S12-4 (FSR-)1 M14-8 (FSR+) - M14-4 (FSR-)2	W - B	Center airbag sensor assembly communication line	Ignition switch ON	Pulse generation
S12-9 (BSW) - S12-5 (BGND)1 M14-9 (BSW) - M14-5 (BGND)2	L - GR1 G - Y2	Front passenger side buckle switch line	Always	4 to 14 V
S13-1 (SGD1) - S12-3 (GND)1 S13-1 (SGD1) - M14-3 (GND)2	R - W-B1 Y - W-B2	Front occupant classification sensor LH ground line	Always	Below 1 V
S13-2 (SGD2) - S12-3 (GND)1 S13-2 (SGD2) - M14-3 (GND)2	Y - W-B1 SB - W-B2	Front occupant classification sensor RH ground line	Always	Below 1 V
S13-3 (SGD3) - S12-3 (GND)1 S13-3 (SGD3) - M14-3 (GND)2	BR - W-B1 L - W-B2	Rear occupant classification sensor LH ground line	Always	Below 1 V
S13-4 (SGD4) - S12-3 (GND)1 S13-4 (SGD4) - M14-3 (GND)2	LG - W-B1 W - W-B2	Rear occupant classification sensor RH ground line	Always	Below 1 V
S13-11 (SVC1) - S13-1 (SGD1)	Y - R1 P - Y2	Front occupant classification sensor LH power supply line	Ignition switch ON, a load applied to front occupant classification sensor LH	4.9 to 5.1 V
S13-12 (SVC2) - S13-2 (SGD2)	V - Y1 BR - SB2	Front occupant classification sensor RH power supply line	Ignition switch ON, a load applied to front occupant classification sensor RH	4.9 to 5.1 V
S13-5 (SVC3) - S13-3 (SGD3)	G - BR1 R - L2	Rear occupant classification sensor LH power supply line	Ignition switch ON, a load applied to rear occupant classification sensor LH	4.9 to 5.1 V
S13-6 (SVC4) - S13-4 (SGD4)	GR - LG1 B - W2	Rear occupant classification sensor RH power supply line	Ignition switch ON, a load applied to rear occupant classification sensor RH	4.9 to 5.1 V
S13-7 (SIG1) - S13-1 (SGD1)	P - R1 BE - Y2	Front occupant classification sensor LH signal line	Ignition switch ON, a load applied to front occupant classification sensor LH	0 to 5.1 V
S13-8 (SIG2) - S13-2 (SGD2)	GR - Y1 GR - SB2	Front occupant classification sensor RH signal line	Ignition switch ON, a load applied to front occupant classification sensor RH	0 to 5.1 V
S13-9 (SIG3) - S13-3 (SGD3)	L - BR1 G - L2	Rear occupant classification sensor LH signal line	Ignition switch ON, a load applied to rear occupant classification sensor LH	0 to 5.1 V
S13-10 (SIG4) - S13-4 (SGD4)	SB - LG1 V - W2	Rear occupant classification sensor RH signal line	Ignition switch ON, a load applied to rear occupant classification sensor RH	0 to 5.1 V

*1: w/ Power Seat
*2: w/o Power Seat

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

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