Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Terminals Of Ecu

TERMINALS OF ECU

OCCUPANT DETECTION ECU

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

R8-1 (SVC1) - R8-5 (SGD1)

R - G

Front occupant classification sensor LH power supply

Engine switch on (IG)

11 to 14 V

R8-2 (SVC3) - R8-6 (SGD3)

GR - W

Rear occupant classification sensor LH power supply

Engine switch on (IG)

11 to 14 V

R8-3 (SIG1) - R8-5 (SGD1)

P - G

Front occupant classification sensor LH signal

Engine switch on (IG)

Pulse generation

R8-4 (SIG3) - R8-6 (SGD3)

Y - W

Rear occupant classification sensor LH signal

Engine switch on (IG)

Pulse generation

R8-5 (SGD1) - R7-10 (GND)

G - W-B

Front occupant classification sensor LH ground

Always

Below 1 V

R8-6 (SGD3) - R7-10 (GND)

W - W-B

Rear occupant classification sensor LH ground

Always

Below 1 V

R7-4 (CANN) - R7-10 (GND)

W - W-B

CAN communication line

Engine switch on (IG)

Pulse generation

R7-5 (CANP) - R7-10 (GND)

L - W-B

CAN communication line

Engine switch on (IG)

Pulse generation

R7-6 (IG) - R7-10 (GND)

B - W-B

Power source

Engine switch on (IG)

11 to 14 V

R7-7 (BSW) - R7-9 (BGND)

G - P

Front passenger side buckle switch signal

Always

Pulse generation

R7-9 (BGND) - R7-10 (GND)

P - W-B

Front passenger side buckle switch ground

Always

Below 1 V

R7-10 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

    System Diagram

    Trouble in Passenger Airbag ON/OFF Indicator

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