Toyota Venza manuals

Toyota Venza: Terminals Of Ecu

TERMINALS OF ECU

1. OCCUPANT CLASSIFICATION ECU (for Power Seat)


Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specification

S12-1 (+B) - S12-3 (GND)

GR - W-B

Battery

Always

10 to 14 V

S12-2 (DIA) - S12-3 (GND)

SB - W-B

Diagnosis (DLC3)

Ignition switch ON

Pulse generation

S12-3 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

S12-4 (FSR-) - S12-3 (GND)

B - W-B

Center airbag sensor assembly communication line (-)

Always

Below 1 V

S12-5 (BGND) - S12-3 (GND)

GR - W-B

Passenger side buckle switch ground line

Always

Below 1 V

S12-7 (IG) - S12-3 (GND)

V - W-B

Power source (ECU-B fuse)

Ignition switch ON

10 to 14 V

S12-8 (FSR+) - S12-4 (FSR-)

W - B

Center airbag sensor assembly communication line

Ignition switch ON

Pulse generation

S12-9 (BSW) - S12-5 (BGND)

L - GR

Passenger side buckle switch line

Always

4 to 14 V

S13-1 (SGD1) - S12-3 (GND)

R - W-B

Front occupant classification sensor LH ground line

Always

Below 1 V

S13-2 (SGD2) - S12-3 (GND)

Y - W-B

Front occupant classification sensor RH ground line

Always

Below 1 V

S13-3 (SGD3) - S12-3 (GND)

BR - W-B

Rear occupant classification sensor LH ground line

Always

Below 1 V

S13-4 (SGD4) - S12-3 (GND)

LG - W-B

Rear occupant classification sensor RH ground line

Always

Below 1 V

S13-5 (SVC3) - S13-3 (SGD3)

G - BR

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 - LG

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 - R

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 - Y

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 - BR

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 - LG

Rear occupant classification sensor RH signal line

Ignition switch ON, a load applied to rear occupant classification sensor RH

0 to 5.1 V

S13-11 (SVC1) - S13-1 (SGD1)

Y - R

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 - Y

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

2. OCCUPANT CLASSIFICATION ECU (for Manual Seat)


Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specification

M14-1 (+B) - M14-3 (GND)

G - W-B

Battery

Always

10 to 14 V

M14-2 (DIA) - M14-3 (GND)

SB - W-B

Diagnosis (DLC3)

Ignition switch ON

Pulse generation

M14-3 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

M14-4 (FSR-) - M14-3 (GND)

B - W-B

Center airbag sensor assembly communication line (-)

Always

Below 1 V

M14-5 (BGND) - M14-3 (GND)

Y - W-B

Passenger side buckle switch ground line

Always

Below 1 V

M14-7 (IG) - M14-3 (GND)

V - W-B

Power source (ECU-B fuse)

Ignition switch ON

10 to 14 V

M14-8 (FSR+) - M14-4 (FSR-)

W - B

Center airbag sensor assembly communication line

Ignition switch ON

Pulse generation

M14-9 (BSW) - M14-5 (BGND)

G - Y

Passenger side buckle switch line

Always

4 to 14 V

S13-1 (SGD1) - M14-3 (GND)

Y - W-B

Front occupant classification sensor LH ground line

Always

Below 1 V

S13-2 (SGD2) - M14-3 (GND)

SB - W-B

Front occupant classification sensor RH ground line

Always

Below 1 V

S13-3 (SGD3) - M14-3 (GND)

L - W-B

Rear occupant classification sensor LH ground line

Always

Below 1 V

S13-4 (SGD4) - M14-3 (GND)

W - W-B

Rear occupant classification sensor RH ground line

Always

Below 1 V

S13-5 (SVC3) - S13-3 (SGD3)

R - L

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)

B - W

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)

BE - Y

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 - SB

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)

G - L

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)

V - W

Rear occupant classification sensor RH signal line

Ignition switch ON, a load applied to rear occupant classification sensor RH

0 to 5.1 V

S13-11 (SVC1) - S13-1 (SGD1)

P - Y

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)

BR - SB

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

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Diagnosis System
DIAGNOSIS SYSTEM 1. CHECK DLC3 (a) Check the DLC3 (See page ). 2. FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR (a) Initial check. (1) Turn the ignition switch to ON. (2) The passenger airbag O ...

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System Description
SYSTEM DESCRIPTION 1. DESCRIPTION OF OCCUPANT CLASSIFICATION SYSTEM (a) GENERAL DESCRIPTION (1) In the occupant classification system, the occupant classification ECU calculates the weight of the occupant based on signals from the occupant classification ...

IG Signal Circuit
DESCRIPTION This circuit detects the ignition switch ON or off condition, and sends it to the main body ECU (driver side junction block assembly). WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system b ...

Disassembly
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