Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK COMBINATION METER ASSEMBLY

(a) Measure the resistance and voltage according to the value(s) in the table

(a) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

C9-19 (B) - Body ground

P - Body ground

Battery power supply

Always

11 to 14 V

C9-20 (IG+) - Body ground

BE - Body ground

Ignition switch power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

C9-17 (EP) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

C9-18 (ES) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

C9-1 (CANH) - Body ground

G - Body ground

CAN communication line

Always

200 Ω or higher

C9-2 (CANL) - Body ground

W - Body ground

CAN communication line

Always

200 Ω or higher

  • If the result is not as specified, the combination meter assembly may have a malfunction.

2. CHECK CENTER AIRBAG SENSOR ASSEMBLY

Terminal No.

Terminal Symbol

Destination

A23-12

FSR+

Occupant classification ECU

A23-13

FSR-

Occupant classification ECU

A22-11

LBE+

Front seat inner belt assembly (for driver side)

A22-12

LBE-

Front seat inner belt assembly (for driver side)

3. CHECK OCCUPANT CLASSIFICATION ECU

(a) Measure the voltage and check for pulses according to the value(s) in the

(a) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

O5-1 (+B) - O5-3 (GND)

R - W-B

Battery power supply

Always

11 to 14 V

O5-2 (DIA) - O5-3 (GND)

W - W-B

Diagnosis (DLC3)

Ignition switch ON

Pulse generation

O5-3 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 V

O5-7 (IG) - O5-3 (GND)

BE - W-B

Ignition switch power supply

Ignition switch ON

11 to 14 V

O5-8 (FSR+) - O5-4 (FSR-)

W - B

Center airbag sensor assembly communication line

Ignition switch ON

Pulse generation

O5-9 (BSW) - O5-5 (BGND)

G - P-G

Front passenger side buckle switch line

Always

4 to 14 V

O4-1 (SGD1) - O5-3 (GND)

L - W-B

Front occupant classification sensor LH ground line

Always

Below 1 V

O4-2 (SGD2) - O5-3 (GND)

BE - W-B

Front occupant classification sensor RH ground line

Always

Below 1 V

O4-3 (SGD3) - O5-3 (GND)

P-G - W-B

Rear occupant classification sensor LH ground line

Always

Below 1 V

O4-4 (SGD4) - O5-3 (GND)

B-R - W-B

Rear occupant classification sensor RH ground line

Always

Below 1 V

O4-11 (SVC1) - O4-1 (SGD1)

B-L - L

Front occupant classification sensor LH power supply line

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

4.9 to 5.1 V

O4-12 (SVC2) - O4-2 (SGD2)

LG-B - BE

Front occupant classification sensor RH power supply line

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

4.9 to 5.1 V

O4-5 (SVC3) - O4-3 (SGD3)

B - P-G

Rear occupant classification sensor LH power supply line

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

4.9 to 5.1 V

O4-6 (SVC4) - O4-4 (SGD4)

GR-L - B-R

Rear occupant classification sensor RH power supply line

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

4.9 to 5.1 V

O4-7 (SIG1) - O4-1 (SGD1)

G - L

Front occupant classification sensor LH signal line

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

0 to 5.1 V

O4-8 (SIG2) - O4-2 (SGD2)

R-L - BE

Front occupant classification sensor RH signal line

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

0 to 5.1 V

O4-9 (SIG3) - O4-3 (SGD3)

R-B - P-G

Rear occupant classification sensor LH signal line

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

0 to 5.1 V

O4-10 (SIG4) - O4-4 (SGD4)

L-R - B-R

Rear occupant classification sensor RH signal line

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

0 to 5.1 V

  • If the result is not as specified, the occupant classification ECU may have a malfunction.
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Driver Side Seat Belt Warning Light does not Operate
DESCRIPTION When the ignition switch is ON, the airbag sensor assembly transmits front seat inner belt status signals to the combination meter assembly through CAN. If the driver seat belt is not ...

Other materials:

Sensor (Motor) Failure (B2341,B2344)
DESCRIPTION When the sliding roof ECU (sliding roof drive gear sub-assembly) detects a motor malfunction and the sliding roof operation is stopped, DTC B2341 is stored. When the sliding roof ECU (sliding roof drive gear sub-assembly) detects a gear position malfunction and the sliding roof ope ...

Removal
REMOVAL PROCEDURE 1. REMOVE TRANSMISSION INSULATOR RH (for 2GR-FKS) 2. REMOVE TRANSMISSION INSULATOR RH (for 2TR-FE) 3. SEPARATE WATER BY-PASS PIPE (for 2GR-FKS) (a) Remove the 2 bolts to separate the water by-pass pipe from the automatic transmission assembly. ...

ACC Signal Circuit
DESCRIPTION This circuit detects whether the ignition switch is ACC or off, and sends this information to the main body ECU (multiplex network body ECU). WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the fo ...

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