EPS CONTROL MODULE INSPECTION

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1. Attach the tester lead to the EPS control module wiring harness-side connector and inspect the voltage, continuity, or resistance according to the standard (reference value) in the table below.

Note

• When inspecting the torque sensor and EPS motor for continuity, switch the ignition to off and inspect with the connectors for the EPS control module, torque sensor, and EPS motor disconnected.

Standard (reference)

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Terminal

Signal name

Input/output

Connected to

Measured item

Measured terminal (measurement condition)

Standard

Inspection item(s)

1A

Ground

—

Ground point

Voltage

Under any condition

1 V or less

•  Wiring harness (1A—ground point)

1B

Battery power supply

Input

Battery

Voltage

Under any condition

B+

•  Wiring harness (1B—battery)

•  Fuse (80A)

2A

Ignition power supply

Input

Ignition switch or ignition relay

Voltage

Ignition at ON

B+

•  Wiring harness (1F—ignition switch or ignition relay)

•  Fuse (15 A)

Ignition off

1 V or less

2B

CAN_H

Input

↔

Output

—

Perform DTC inspection

—

2C

CAN_L

Input

↔

Output

—

Perform DTC inspection

—

3A

Torque sensor

(Signal 1)

—

Torque sensor

Continuity

Terminal 3A—torque sensor terminal C

Continuity detected

•  Wiring harness (3A—torque sensor C)

3B

—

—

—

—

—

—

—

3C

Torque sensor

(Drive signal)

—

Torque sensor

Continuity

Terminal 3C—torque sensor terminal B

Continuity detected

•  Wiring harness (3C—torque sensor B)

3D

Torque sensor

(Signal 2)

—

Torque sensor

Continuity

Terminal 3D—torque sensor terminal A

Continuity detected

•  Wiring harness (3D—torque sensor A)

3E

Resolver sensor

(Signal)

—

Resolver sensor

Continuity

Terminal 3E—resolver sensor terminal A

Continuity detected

•  Wiring harness (3E—resolver sensor A)

3F

Resolver sensor

(Signal)

—

Resolver sensor

Continuity

Terminal 3F—resolver sensor terminal E

Continuity detected

•  Wiring harness (3F—resolver sensor E)

3G

Resolver sensor

(Signal)

—

Resolver sensor

Continuity

Terminal 3G—resolver sensor terminal D

Continuity detected

•  Wiring harness (3G—resolver sensor D)

3H

Resolver sensor

(Signal)

—

Resolver sensor

Continuity

Terminal 3H—resolver sensor terminal C

Continuity detected

•  Wiring harness (3H—resolver sensor C)

3I

Resolver sensor

(Signal)

—

Resolver sensor

Continuity

Terminal 3I—resolver sensor terminal F

Continuity detected

•  Wiring harness (3I—resolver sensor F)

3J

Resolver sensor

(Signal)

—

Resolver sensor

Continuity

Terminal 3J—resolver sensor terminal B

Continuity detected

•  Wiring harness (3J—resolver sensor B)

4A

EPS motor

—

EPS motor

Continuity

Terminal 4A—EPS motor terminal C

Continuity detected

•  Wiring harness (4A—EPS motor C)

4B

EPS motor

—

EPS motor

Continuity

Terminal 4B—EPS motor terminal A

Continuity detected

•  Wiring harness (4B—EPS motor A)

4C

EPS motor

—

EPS motor

Continuity

Terminal 4C—EPS motor terminal B

Continuity detected

•  Wiring harness (4C—EPS motor B)

5A

—

—

—

—

—

—

—

5B

Gear earth

—

Steering gear and linkage

Continuity

Terminal 5B—steering gear and linkage

Continuity detected

•  Wiring harness (5B—steering gear and linkage)

5C

—

—

—

—

—

—

—

5D

—

—

—

—

—

—

—

Terminal	Signal name	Input/output	Connected to	Measured item	Measured terminal (measurement condition)	Standard	Inspection item(s)
1A	Ground	—	Ground point	Voltage	Under any condition	1 V or less	• Wiring harness (1A—ground point)
1B	Battery power supply	Input	Battery	Voltage	Under any condition	B+	• Wiring harness (1B—battery) • Fuse (80A)
2A	Ignition power supply	Input	Ignition switch or ignition relay	Voltage	Ignition at ON	B+	• Wiring harness (1F—ignition switch or ignition relay) • Fuse (15 A)
2A	Ignition power supply	Input	Ignition switch or ignition relay	Voltage	Ignition off	1 V or less
2B	CAN_H	Input ↔ Output	—	Perform DTC inspection			—
2C	CAN_L	Input ↔ Output	—	Perform DTC inspection			—
3A	Torque sensor (Signal 1)	—	Torque sensor	Continuity	Terminal 3A—torque sensor terminal C	Continuity detected	• Wiring harness (3A—torque sensor C)
3B	—	—	—	—	—	—	—
3C	Torque sensor (Drive signal)	—	Torque sensor	Continuity	Terminal 3C—torque sensor terminal B	Continuity detected	• Wiring harness (3C—torque sensor B)
3D	Torque sensor (Signal 2)	—	Torque sensor	Continuity	Terminal 3D—torque sensor terminal A	Continuity detected	• Wiring harness (3D—torque sensor A)
3E	Resolver sensor (Signal)	—	Resolver sensor	Continuity	Terminal 3E—resolver sensor terminal A	Continuity detected	• Wiring harness (3E—resolver sensor A)
3F	Resolver sensor (Signal)	—	Resolver sensor	Continuity	Terminal 3F—resolver sensor terminal E	Continuity detected	• Wiring harness (3F—resolver sensor E)
3G	Resolver sensor (Signal)	—	Resolver sensor	Continuity	Terminal 3G—resolver sensor terminal D	Continuity detected	• Wiring harness (3G—resolver sensor D)
3H	Resolver sensor (Signal)	—	Resolver sensor	Continuity	Terminal 3H—resolver sensor terminal C	Continuity detected	• Wiring harness (3H—resolver sensor C)
3I	Resolver sensor (Signal)	—	Resolver sensor	Continuity	Terminal 3I—resolver sensor terminal F	Continuity detected	• Wiring harness (3I—resolver sensor F)
3J	Resolver sensor (Signal)	—	Resolver sensor	Continuity	Terminal 3J—resolver sensor terminal B	Continuity detected	• Wiring harness (3J—resolver sensor B)
4A	EPS motor	—	EPS motor	Continuity	Terminal 4A—EPS motor terminal C	Continuity detected	• Wiring harness (4A—EPS motor C)
4B	EPS motor	—	EPS motor	Continuity	Terminal 4B—EPS motor terminal A	Continuity detected	• Wiring harness (4B—EPS motor A)
4C	EPS motor	—	EPS motor	Continuity	Terminal 4C—EPS motor terminal B	Continuity detected	• Wiring harness (4C—EPS motor B)
5A	—	—	—	—	—	—	—
5B	Gear earth	—	Steering gear and linkage	Continuity	Terminal 5B—steering gear and linkage	Continuity detected	• Wiring harness (5B—steering gear and linkage)
5C	—	—	—	—	—	—	—
5D	—	—	—	—	—	—	—