Toyota Tacoma 2015-2018 Service Manual: Terminals Of Ecu

*1

Main Body ECU (Multiplex Network Body ECU)

-

-

MB-31 (BECU) - Body ground

-

Battery power supply

Always

11 to 14 V

MB-11 (GND1) - Body ground

-

Ground

Always

Below 1 Ω

MB-30 (ACC) - Body ground

-

ACC power supply

Ignition switch ACC

11 to 14 V

Ignition switch off

Below 1 V

MB-32 (IG) - Body ground

-

IG power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

M6-1 (DIM) - Body ground

Y - Body ground

Dimmer relay output

Dimmer switch in low position

11 to 14 V

Dimmer switch in high or high flash position

Below 1 V

1F-28 - Body ground

W - Body ground

Headlight relay drive output

Light control switch in head position

Below 1 V

Light control switch not in head position

11 to 14 V

1F-30 - Body ground*1

R - Body ground

Daytime running light system drive output

Daytime running light system operating

Below 1 V

Daytime running light system not operating

11 to 14 V

M6-24 (HU) - Body ground

BE - Body ground

Dimmer switch high position signal input

Dimmer switch in high position

Below 1 V

Dimmer switch not in high position

11 to 14 V or pulse generation

M6-10 (HF) - Body ground

SB - Body ground

Dimmer switch high flash position signal input

Dimmer switch in high flash position

Below 1 V

Dimmer switch not in high flash position

11 to 14 V or pulse generation

M6-17 (AHBI) - Body ground*5

R - Body ground

Auto high beam main switch signal input

Auto high beam main switch on

Below 1 V

Auto high beam main switch off

11 to 14 V

M6-22 (TAIL) - Body ground

G - Body ground

Light control switch tail position signal input

Light control switch in tail or head position

Below 1 V

Ignition switch off, light control switch not in tail or head position

11 to 14 V or pulse generation

M6-12 (HEAD) - Body ground

Y - Body ground

Light control switch head position input

Light control switch in head position

Below 1 V

Ignition switch off, light control switch not in head position

11 to 14 V or pulse generation

M6-8 (A) - Body ground*2, *4

W - Body ground

Light control switch AUTO position signal input

Light control switch in AUTO position

Below 1 V

Ignition switch off, light control switch not in AUTO position

11 to 14 V or pulse generation

M6-26 (FFOG) - Body ground*3

L - Body ground

Fog light switch front position input

Fog light switch in front position

Below 1 V

Ignition switch off, fog light switch off

11 to 14 V or pulse generation

M6-19 (CLTB)*4 - M6-21 (CLTE)*4

P - R

Automatic light control sensor power supply output

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

M6-20 (CLTS)*4 - Body ground

GR - Body ground

Automatic light control sensor signal input

Ignition switch off

Below 1 V

Ignition switch ON

Communication waveform generation

(See waveform 1)

1F-27 - Body ground*3

BE - Body ground

Front fog light drive output

Light control switch in tail or head position, fog light switch in front position

Below 1 V

Light control switch in tail or head position, fog light switch off

11 to 14 V

1H-36 - Body ground

P - Body ground

Rear door courtesy light switch LH input

Rear door LH open

Below 1 V

Rear door LH closed

Pulse generation

1D-30 - Body ground

V - Body ground

Rear door courtesy light switch RH input

Rear door RH open

Below 1 V

Rear door RH closed

Pulse generation

M6-6 (FLCY) - Body ground

Y - Body ground

Front door courtesy light switch LH input

Front door LH open

Below 1 V

Front door LH closed

pulse generation

M6-27 (FRCY) - Body ground

LG - Body ground

Front door courtesy light switch RH input

Front door RH open

Below 1 V

Front door RH closed

pulse generation

1H-27 - Body ground

L - Body ground

Rear door unlock detection switch LH input

Rear door LH locked

Pulse generation

Rear door LH or rear door RH unlocked

Below 1 V

1A-41 - Body ground

Y - Body ground

Rear door unlock detection switch RH input

Rear door RH locked

Pulse generation

Rear door LH or rear door RH unlocked

Below 1 V

1D-11 - Body ground

P - Body ground

Front door unlock detection switch LH input

Front door LH locked

Pulse generation

Front door LH unlocked

Below 1 V

1D-24 - Body ground

GR - Body ground

Front door unlock detection switch RH input

Front door RH locked

Pulse generation

Front door RH unlocked

Below 1 V

Tool setting

2 V/DIV., 10 ms./DIV.

Vehicle condition

Ignition switch ON, automatic light control system operating