Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Terminals Of Ecu

TERMINALS OF ECU

1. OCCUPANT DETECTION ECU

Symbols (Terminal No.)

Wiring Color

Terminal Description

Condition

Specification

+B (O5-1) -

GND (O5-3)

R - W-B

Battery

Ignition switch on

10 to 14 V

DIA (O5-2) -

GND (O5-3)

W - W-B

Diagnosis (DLC3)

Ignition switch on

Pulse generation

GND (O5-3) -

Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

FSR- (O5-4) -

GND (O5-3)

B - W-B

Airbag sensor assembly communication line (-)

Always

Below 1 Ω

BGND (O5-5) -

GND (O5-3)

P-G - W-B

Passenger side buckle switch ground line

Always

Below 1 Ω

IG (O5-7) -

GND (O5-3)

BE - W-B

Power source (IGN Fuse)

Ignition switch on

10 to 14 V

FSR+ (O5-8) -

FSR- (O5-4)

W - B

Airbag sensor assembly communication line

Ignition switch on

Pulse generation

BSW (O5-9) -

BGND (O5-5)

G - P-G

Passenger side buckle switch line

Buckle switch ON

Buckle switch OFF

Pulse generation

SGD1 (O4-1) -

GND (O5-3)

L - W-B

Occupant classification sensor front LH ground line

Always

Below 1 Ω

SGD2 (O4-2) -

GND (O5-3)

BE - W-B

Occupant classification sensor front RH ground line

Always

Below 1 Ω

SGD3 (O4-3) -

GND (O5-3)

P-G - W-B

Occupant classification sensor rear LH ground line

Always

Below 1 Ω

SGD4 (O4-4) -

GND (O5-3)

B-R - W-B

Occupant classification sensor rear RH ground line

Always

Below 1 Ω

SVC1 (O4-11) -

SGD1 (O4-1)

B-L - L

Occupant classification sensor front LH power supply line

Ignition switch on, a load is applied to occupant classification sensor front LH

4.5 to 5.1 V

SVC2 (O4-12) -

SGD2 (O4-2)

LG-B - BE

Occupant classification sensor front RH power supply line

Ignition switch on, a load is applied to occupant classification sensor front RH

4.5 to 5.1 V

SVC3 (O4-5) -

SGD3 (O4-3)

B -P-G

Occupant classification sensor rear LH power supply line

Ignition switch on, a load is applied to occupant classification sensor rear LH

4.5 to 5.1 V

SVC4 (O4-6) -

SGD4 (O4-4)

GR-L - B-R

Occupant classification sensor rear RH power supply line

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

4.5 to 5.1 V

SIG1 (O4-7) -

SGD1 (O4-1)

G - L

Occupant classification sensor front LH signal line

Ignition switch on, a load is applied to occupant classification sensor front LH

Pulse generation

SIG2 (O4-8) -

SGD2 (O4-2)

R-L - BE

Occupant classification sensor front RH signal line

Ignition switch on, a load is applied to occupant classification sensor front RH

Pulse generation

SIG3 (O4-9) -

SGD3 (O4-3)

R-B - P-G

Occupant classification sensor rear LH signal line

Ignition switch on, a load is applied to occupant classification sensor rear LH

Pulse generation

SIG4 (O4-10) -

SGD4 (O4-4)

L-R - B-R

Occupant classification sensor rear RH signal line

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

Pulse generation

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Proceed to the troubleshooting for each circuit in the table below. Symptom Suspected Area See page Passenger seat occ ...

Sleep Operation Failure of Occupant Classification ECU (B1796)
DESCRIPTION During sleep mode, the occupant detection ECU monitors the condition of each sensor while the ignition switch is off. In this mode, if the occupant detection ECU detects an internal m ...

Other materials:

Freeze Frame Data
FREEZE FRAME DATA CHECK FREEZE FRAME DATA HINT: The ECU records vehicle and driving condition information as freeze frame data the moment a DTC is stored. (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: P ...

Turn Signal Switch Circuit
DESCRIPTION The combination meter assembly receives the turn signal switch information and controls the turn signal lights. WIRING DIAGRAM PROCEDURE 1. READ VALUE USING TECHSTREAM (TURN SIGNAL SWITCH) (a) Connect the Techstream to the DLC3. (b) Turn the igni ...

Dtc Check / Clear
DTC CHECK / CLEAR NOTICE: The steering lock ECU (steering lock actuator or UPR bracket assembly) does not store history DTCs. If any DTCs are output, confirm and record them as soon as possible. Do not turn the engine switch off or clear the DTCs until the DTCs are confirmed an ...

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