Toyota CH-R Service Manual: Terminals Of Ecu

*A

Main Body ECU (Multiplex Network Body ECU) with 1 Connector

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*A

Main Body ECU (Multiplex Network Body ECU) with 2 Connectors

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MB-31 (BECU) - Body ground

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Battery power supply

Always

11 to 14 V

MB-32 (IG) - Body ground

-

Ignition power supply (IG signal)

Ignition switch ON → off

11 to 14 V → Below 1 V

MB-30 (ACC) - Body ground

-

Ignition power supply (ACC signal)

Ignition switch ACC → off

11 to 14 V → Below 1 V

MB-11 (GND1) - Body ground

-

Ground

Always

Below 1 Ω

MB-2 (RCTY) - Body ground

-

Rear door courtesy light switch RH input

Rear door LH closed (OFF)

10 kΩ or higher

Rear door LH open (ON)

Below 1 Ω

MB-13 (LCTY) - Body ground

-

Rear door courtesy light switch LH input

Rear door RH closed (OFF)

10 kΩ or higher

Rear door RH open (ON)

Below 1 Ω

F4-40 (B) - Body ground

SB - Body ground

Battery power supply

Always

11 to 14 V

F4-39 (IG+) - Body ground

P - Body ground

Ignition power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

F4-21 (ET) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

F4-10 (MSD) - Body ground

V - Body ground

Rear LH seat belt buckle switch signal

Rear LH seat belt fastened

10 kΩ or higher

Rear LH seat belt unfastened

Below 1 Ω

F4-11 (MSTI) - Body ground

BE - Body ground

Rear center seat belt buckle switch signal

Rear center seat belt fastened

10 kΩ or higher

Rear center seat belt unfastened

Below 1 Ω

F4-13 (MSFM) - Body ground

R - Body ground

Rear RH seat belt buckle switch signal

Rear RH seat belt fastened

10 kΩ or higher

Rear RH seat belt unfastened

Below 1 Ω

F4-3 (RRMT) - Body ground

W - Body ground

Rear RH seat belt warning light signal

Ignition switch ON, Rear RH seat belt unfastened within 34 seconds after closing rear door

Below 1 V

Ignition switch ON, Rear RH seat belt fastened within 34 seconds after closing rear door

11 to 14 V

F4-2 (RCMT) - Body ground

V - Body ground

Rear center seat belt warning light signal

Ignition switch ON, Rear center seat belt unfastened within 34 seconds after closing rear door

Below 1 V

Ignition switch ON, Rear center seat belt fastened within 34 seconds after closing rear door

11 to 14 V

F4-1 (RLMT) - Body ground

L - Body ground

Rear LH seat belt warning light signal

Ignition switch ON, Rear LH seat belt unfastened within 34 seconds after closing rear door

Below 1 V

Ignition switch ON, Rear LH seat belt fastened within 34 seconds after closing rear door

11 to 14 V

M1-10

LBE+

Front seat inner belt assembly LH

M1-18

LBE-

Front seat inner belt assembly LH

Y6-10 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

Y6-6 (IG2) - Y6-10 (GND)

B - W-B

Power source

Ignition switch ON

11 to 14 V

Y6-9 (BGND) - Y6-10 (GND)

P - W-B

Front passenger buckle switch ground

Always

Below 1 V

Y6-7 (BSW) - Y6-9 (BGND)

G - P

Front passenger buckle switch signal

Always

Pulse generation

Y5-1 (SVC1) - Y5-5 (SGD1)

R - G

Front occupant classification sensor LH power supply

Ignition switch ON

11 to 14 V

Y5-2 (SVC3) - Y5-6 (SGD3)

GR - W

Rear occupant classification sensor LH power supply

Ignition switch ON

11 to 14 V

Y5-3 (SIG1) - Y5-5 (SGD1)

P - G

Front occupant classification sensor LH signal

Ignition switch ON

Pulse generation

Y5-4 (SIG3) - Y5-6 (SGD3)

SB - W

Rear occupant classification sensor LH signal

Ignition switch ON

Pulse generation

Y5-5 (SGD1) - Y6-10 (GND)

G - W-B

Front occupant classification sensor LH ground

Always

Below 1 V

Y5-6 (SGD3) - Y6-10 (GND)

W - W-B

Rear occupant classification sensor LH ground

Always

Below 1 V