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:

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Dtc Check / Clear
DTC CHECK / CLEAR 1. DTC CHECK HINT: When DTC B1650/23 is detected as a result of troubleshooting for the airbag system, troubleshoot the occupant classification system. Use the Techstream to read and clear DTCs, otherwise the DTCs cannot be read and cleared. (a) Check ...

Reassembly
REASSEMBLY PROCEDURE 1. INSTALL UN-LOCK WARNING SWITCH ASSEMBLY (w/o Smart Key System) (a) Engage the 2 claws to install the un-lock warning switch assembly to the upper steering column bracket assembly. 2. INSTALL IGNITION SWITCH LOCK CYLINDER ASSEMBLY (w/o Smart Key System) (a) T ...

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