Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
HINT:

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

JUNCTION CONNECTOR

D-CAN J/C

Fig 1: Identifying Junction Connector - D-CAN J/C

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ECU CONNECTOR TERMINAL REFERENCE CHART

D-CAN J/C connectors	Terminal	Color
Brake actuator (Skid control ECU*1 (CAN-H))	D41-1 (ABS)	G
Brake actuator (Skid control ECU*1 (CAN-L))	D41-12 (ABS)	W
DLC3 (CAN-H)	D41-3 (OBD)	V
DLC3 (CAN-L)	D41-14 (OBD)	W
ECM (CAN-H)	D41-4 (EFI)	L
ECM (CAN-L)	D41-15(EFI)	W
Air Conditioning Amplified (CAN-H)	D41-6 (A/C)	V
Air Conditioning Amplified (CAN-L)	D41-17 (A/C)	W
Center Airbag Sensor Assembly (CAN-H)	D41-8(A/B)	B
Center Airbag Sensor Assembly (CAN-L)	D41-19(A/B)	W
CAN main wire (between D-CAN and P-CAN J/C)	D41-11 (TORH)	Y
CAN main wire (between D-CAN and P-CAN J/C)	D41-22 (TORH)	W

HINT:

*1: w/ABS

*2: w/ Air conditioning or PTC heater

JUNCTION CONNECTOR

P-CAN J/C

JUNCTION CONNECTOR REFERENCE

P-CAN J/C connectors	Terminal	Color
Power Steering ECU (CAN-H)	D42-4 (EPS)	SB
Power Steering ECU (CAN-L)	D42-15 (EPS)	W
Main Body ECU (CAN-H)	D42-5 (JB)	R
Main Body ECU (CAN-L)	D42-16(JB)	W
Combination Meter ECU (CAN-H)	D42-7 (MET)	G
Combination Meter ECU (CAN-L)	D42-18(MET)	W
CAN main wire (between P-CAN and D-CAN J/C)	D42-11 (TOLH)	Y
CAN main wire (between P-CAN and D-CAN J/C)	D42-22 (TOLH)	W

Fig 2: Identifying Junction Connector - P-CAN J/C

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Wiring diagram for identifying CAN J/C connectors

Fig 3: Wiring Diagram For Identifying CAN J/C Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

DLC3

Turn the ignition switch OFF.

Measure the resistance.

Fig 4: Identifying DLC3 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

RESISTANCE SPECIFICATION CONDITION CHART

Terminals	Wiring Color	Condition	Specified Condition
D15-6 (CANH) - D15-14 (CANL)	V-W	Ignition Switch OFF	54 to 69 Ω
D15-6 (CANH) - D15-4 (CG)	V-W-B	Ignition Switch OFF	200 Ω or higher
D15-14(CANL)-D15-4(CG)	W - W-B	Ignition Switch OFF	200 Ω or higher
D15-6 (CANH) - D15-16 (BAT)	V-SB	Ignition Switch OFF	6 kΩ or higher
D15-14 (CANL) - D15-16 (BAT)	W-SB	Ignition Switch OFF	6 kΩ or higher

BRAKE ACTUATOR (SKID CONTROL ECU)

HINT:

For vehicle with ABS only.

Turn the ignition switch OFF.
Disconnect the A15 brake actuator (skid control ECU) connector.

Measure the resistance.

Fig 5: Identifying Brake Actuator (Skid Control ECU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

RESISTANCE SPECIFICATION CONDITION CHART

Terminals	Wiring Color	Condition	Specified Condition
A15-6 (CANH) - A15-5 (CANL)	G-W	Ignition Switch OFF	54 to 69 Ω
A15-6 (CANH) - A15-2 (GND1)	G-W-B	Ignition Switch OFF	200 Ω or higher
A15-5 (CANL) - A15-2 (GND1)	W-W-B	Ignition Switch OFF	200 Ω or higher
A15-6 (CANH) - A15-1 (+BS)	G-W	Ignition Switch OFF	6 kΩ or higher
A15-5 (CANL) - A15-1 (+BS)	W-W	Ignition Switch OFF	6 kΩ or higher

ECM

Turn the ignition switch OFF.
Disconnect the A21 and C20 ECM connectors.

Measure the resistance.

Fig 6: Identifying ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

RESISTANCE SPECIFICATION CONDITION CHART

Terminals	Wiring Color	Condition	Specified Condition
A21-41 (CANH) - A21-49 (CANL)	L-W	Ignition switch OFF	108 to 132 Ω
A21-41 (CANH)-C20-104(E1)	L-W	Ignition switch OFF	200 Ω or higher
A21-49 (CANL) - C20-104 (E1)	W-W	Ignition switch OFF	200 Ω or higher
A21-41 (CANH) - A21-20 (BATT)	L-Y	Ignition switch OFF	6 kΩ or higher
A21-49 (CANL) - A21-20 (BATT)	W-Y	Ignition switch OFF	6 kΩ or higher

CENTER AIRBAG SENSOR ASSEMBLY

Turn the ignition switch OFF.
Disconnect the D16 center airbag sensor assembly connector.

Measure the resistance.

Fig 7: Identifying Center Airbag Sensor Assembly Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

RESISTANCE SPECIFICATION CONDITION CHART

Terminals	Wiring Color	Condition	Specified Condition
D16-13 (CANH) - D16-22 (CANL)	B-W	Ignition switch OFF	54 to 69 Ω
D16-13 (CANH) - D16-25 (E1)	B-W-B	Ignition switch OFF	200 Ω or higher
D16-22 (CANL) - D16-25 (E1)	W-W-B	Ignition switch OFF	200 Ω or higher
D16-13 (CANH) - D15-16 (BAT)	B-SB	Ignition switch OFF	6 kΩ or higher
D16-22 (CANL) - D15-16 (BAT)	W-SB	ignition switch OFF	6 kΩ or higher

AIR CONDITIONING AMPLIFIER

HINT:

For vehicle with air conditioning or PTC heater only.

Turn the ignition switch OFF.
Disconnect the E8 air conditioning amplifier connector.

Measure the resistance.

Fig 8: Identifying Air Conditioning Amplifier Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

RESISTANCE SPECIFICATION CONDITION CHART

Terminals	Wiring Color	Condition	Specified Condition
E8-2 (TX+) - E8-3 (TX-)	V-W	Ignition switch OFF	54 to 69 Ω
E8-2(TX+)-E8-12(GND)	V-W-B	Ignition switch OFF	200 Ω or higher
E8-3(TX-)-E8-12(GND)	W - W-B	Ignition switch OFF	200 Ω or higher
E8-2 (TX+) - D15-16 (BAT)	V-SB	Ignition switch OFF	6 kΩ or higher
E8-3(TX-)-D15-16(BAT)	W-SB	Ignition switch OFF	6 kΩ or higher

MAIN BODY ECU

Fig 9: Identifying Main Body ECU Connector Terminal (1 Of 2)

Fig 10: Identifying Main Body ECU Connector Terminal (2 Of 2)

Turn the ignition switch OFF.
Disconnect the 4B and 4E main body ECU connectors.

Measure the resistance.

Standard resistance

RESISTANCE SPECIFICATION CONDITION CHART

Terminals	Wiring Color	Condition	Specified Condition
D33-23 (CANH) - D33-22 (CANL)	R-W	Ignition switch OFF	54 to 69 Ω
D33-23 (CANH) - 4E-17 (GND1)	R-W-B	Ignition switch OFF	200 Ω or higher
D33-22 (CANL) - 4E-17 (GND1)	W-W-B	Ignition switch OFF	200 Ω or higher
D33-23 (CANH) - 4B-30 (BECU)	R-L	Ignition switch OFF	6 kΩ or higher
D33-22 (CANL) - 4B-30 (BECU)	W-L	Ignition switch OFF	6 kΩ or higher

COMBINATION METER ECU

Turn the ignition switch OFF.
Disconnect the D1 combination meter ECU connector.

Measure the resistance.

Fig 11: Identifying D1 Combination Meter ECU Connector Terminal

Standard resistance

RESISTANCE SPECIFICATION CONDITION CHART

Terminals	Wiring Color	Condition	Specified Condition
D1-20 (CANH) - D1-21 (CANL)	G-W	Ignition switch OFF	54 to 69 Ω
D1-20(CANH)-D1-24(ET)	G-BR	Ignition switch OFF	200 Ω or higher
D1-21 (CANL)-D1-24(ET)	W-BR	Ignition switch OFF	200 Ω or higher
D1-20 (CANH) - D1-2 (ECUB)	G-L	Ignition switch OFF	6 kΩ or higher
D1-21 (CANL)-D1-2 (ECUB)	W-L	Ignition switch OFF	6 kΩ or higher

POWER STEERING ECU

Turn the ignition switch OFF.
Disconnect the A19 and D31 power steering ECU connectors.

Measure the resistance.

Fig 12: Identifying A19 And D31 Power Steering ECU Connectors Terminal

Standard resistance

RESISTANCE SPECIFICATION CONDITION CHART

Terminals	Wiring Color	Condition	Specified Condition
D31-1 (CANH) - D31-7 (CANL)	SB-W	Ignition switch OFF	108 to 132 Ω
D31-1 (CANH) - A19-2 (PGND)	SB - W-B	Ignition switch OFF	200 Ω or higher
D31-7 (CANL) - A19-2 (PGND)	W-W-B	Ignition switch OFF	200 Ω or higher
D31-1 (CANH)-A19-1 (PIG)	SB-W	Ignition switch OFF	6 kΩ or higher
D31-7(CANL)-A19-1(PIG)	W-W	Ignition switch OFF	6 kΩ or higher