Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Terminals Of Ecu

TERMINALS OF ECU

1. TERMINALS OF ECU

Text in Illustration

*a

Component without harness connected

(Skid Control ECU (Master Cylinder Solenoid))

-

-

Terminal No. (Symbol)

Terminal Description

S1-1 (GND1)

Ground

S1-2 (+BM1)

Power supply for motor

S1-3 (FR+)

Front wheel speed sensor RH power supply output

S1-4 (FL-)

Front wheel speed LH signal input

S1-5 (RR+)

Rear wheel speed sensor RH power supply output

S1-6 (RL-)

Rear wheel speed LH signal input

S1-7 (STP)

Stop light switch input

S1-9 (CSW)

VSC OFF switch input

S1-11 (CANH)

CAN communication line H

S1-12 (SP1)

Speed signal output for speedometer

S1-13 (TRM3)

A-TRAC switch input*1

CRAWL speed selector switch*2

S1-16 (STPO)

Stop light operated relay output

S1-17 (FR-)

Front wheel speed sensor RH input

S1-18 (FL+)

Front wheel speed sensor LH power supply output

S1-19 (RR-)

Rear wheel speed sensor RH input

S1-20 (RL+)

Rear wheel speed sensor LH power supply output

S1-21 (TRM2)

CRAWL speed selector switch*2

S1-25 (CANL)

CAN communication line L

S1-27 (EXI)

L4 detection switch input

S1-28 (PKB)

MTS SET switch input

S1-29 (EXI4)

4WD detection switch input

S1-31 (+BS)

Power supply for solenoid

S1-32 (GND2)

Ground

S1-41 (LBL)

Brake fluid level warning switch input

S1-43 (TRS)

CRAWL ON/OFF switch*2

S1-44 (TRM1)

CRAWL speed selector switch*2

S1-45 (STP2)

Stop light switch input

S1-46 (IG1)

IG1 power supply

S2-1 (IG2)

IG2 power supply

S2-2 (+BM2)

Power supply for motor

S2-4 (GND3)

Ground

  • *1: for Manual Transmission
  • *2: for Automatic Transmission

2. TERMINAL INSPECTION

Disconnect the connector and measure the voltage or resistance on the wire harness side.

HINT:

Voltage cannot be measured with the connector connected to the skid control ECU (master cylinder solenoid) as the connector is water resistant.

Text in Illustration

*a

Front view of wire harness connector

(Skid Control ECU (Master Cylinder Solenoid))

-

-

Standard

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

S1-1 (GND1) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

S1-2 (+BM1) - Body ground

B - Body ground

Power supply for motor from battery

Always

11 to 14 V

S1-7 (STP) - Body ground

SB - Body ground

Stop light switch input

Stop light switch off (Brake pedal released)

Below 1.5 V

Stop light switch on (Brake pedal depressed)

8 to 14 V

S1-9 (CSW) - Body ground

GR - Body ground

VSC OFF switch input

VSC OFF switch off

10 kΩ or higher

VSC OFF switch on and hold

Below 1 Ω

S1-16 (STPO) - Body ground

B - Body ground

Stop light operated relay output

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

S1-31 (+BS) - Body ground

R - Body ground

Power supply for solenoid from battery

Always

11 to 14 V

S1-32 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

S1-41 (LBL) - Body ground

V - Body ground

Brake fluid level warning switch input

Brake fluid level min. -5 mm

Below 1 Ω

Brake fluid level max.

1.9 to 2.1 kΩ

S1-45 (STP2) - Body ground

L - Body ground

Stop light switch input

Stop light switch off (Brake pedal released)

Below 1.5 V

Stop light switch on (Brake pedal depressed)

8 to 14 V

S1-46 (IG1) - Body ground

G - Body ground

IG1 power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

S2-1 (IG2) - Body ground

BE - Body ground

IG2 power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

S2-2 (+BM2) - Body ground

B - Body ground

Power supply for motor from battery

Always

11 to 14 V

S2-4 (GND3) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

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Diagnosis System
DIAGNOSIS SYSTEM 1. DIAGNOSIS (a) If the skid control ECU (master cylinder solenoid) detects a malfunction, the ABS and/or BRAKE warning lights and the slip indicator lights come on in accordance ...

Other materials:

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DESCRIPTION A situation in which the theft deterrent system unexpectedly sets itself can be caused when the main body ECU (multiplex network body ECU) cannot detect whether a door is open or closed. If the theft deterrent system unexpectedly sets itself, there may be a malfunction in a court ...

Steering Angle Sensor Power Source Voltage Malfunction (C1432)
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