Nissan Versa Sedan. Instruction - part 760

STC-22

< DTC/CIRCUIT DIAGNOSIS >

C1601 BATTERY POWER SUPPLY

2. Turn ignition switch ON.

CAUTION:

Never start the engine.

3. Check voltage between EPS control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT (2)

1. Turn ignition switch OFF.

2. Check the 10A fuse (No. 5).

3. Check the harness for open or short between EPS control unit harness connector M53 terminal 4 and the

10A fuse (No. 5).

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for ignition power supply circuit. Refer to 

PG-20, "Wiring Diagram

— Ignition Power Supply —"

.

NO

>> Repair or replace malfunctioning component.

4.

CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT (3)

1. Turn ignition switch OFF.

2. Check voltage between EPS control unit harness connector terminal and ground.

3. Turn ignition switch ON.

CAUTION:

Never start the engine.

4. Check voltage between EPS control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT (4)

1. Turn ignition switch OFF.

2. Check the 60A fusible link (J).

3. Check the harness for open or short between EPS control unit harness connector E23 terminal 17 and the

60A fusible link (J).

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit. Refer to 

PG-8, "Wiring Diagram — Battery

Power Supply —"

.

EPS control unit

—

Voltage

Connector

Terminal

M53

4

Ground

Approx. 0 V

EPS control unit

—

Voltage

Connector

Terminal

M53

4

Ground

Battery voltage

EPS control unit

—

Voltage

Connector

Terminal

E23

17

Ground

Battery voltage

EPS control unit

—

Voltage

Connector

Terminal

E23

17

Ground

Battery voltage

C1601 BATTERY POWER SUPPLY

STC-23

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

NO

>> Repair or replace malfunctioning component.

6.

CHECK CONNECTOR

1. Turn ignition switch OFF.

2. Disconnect torque sensor harness connector.

3. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or

replace terminal.

Is the inspection result normal?

YES

>> Replace EPS control unit. Refer to 

STC-40, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning component.

STC-24

< DTC/CIRCUIT DIAGNOSIS >

C1604 TORQUE SENSOR

C1604 TORQUE SENSOR

DTC Logic

INFOID:0000000009267364

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and

wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

DTC REPRODUCTION PROCEDURE

With CONSULT

1. Turn the ignition switch OFF to ON.

2. Perform “EPS” self-diagnosis.
Is DTC “C1604” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-24, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009267365

Regarding Wiring Diagram information, refer to 

STC-14, "Wiring Diagram"

.

1.

CHECK TORQUE SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF to ON.

CAUTION:

Never start the engine.

2. Check voltage between EPS control unit harness connector terminal and ground.

CAUTION:

Steering wheel in neutral position. (There is no steering force.)

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform the trouble diagnosis for battery power supply circuit. Refer to 

STC-21, "Diagnosis Proce-

dure"

.

2.

CHECK TORQUE SENSOR GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between EPS control unit harness connector terminal and ground.

CAUTION:

Steering wheel in neutral position. (There is no steering force.)

DTC

Display item

Malfunction detected condition

Possible cause

C1604

TORQUE SENSOR

When torque sensor output signal is malfunctioning.

• Harness or connector
• Torque sensor
• EPS control unit

EPS control unit

—

Voltage

Connector

Terminal

M54

13

Ground

Approx. 5 V

C1604 TORQUE SENSOR

STC-25

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.

CHECK TORQUE SENSOR SIGNAL

1. Turn ignition switch OFF to ON.

2. Check voltage between EPS control unit harness connector terminal and ground.

CAUTION:

Steering wheel in neutral position. (There is no steering force.)

3. Start the engine.

4. Check voltage between EPS control unit harness connector terminal and ground while turning the steer-

ing wheel.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Torque sensor is malfunctioning. Replace steering column assembly. Refer to 

ST-9, "Removal

and Installation"

.

4.

CHECK CONNECTOR

1. Turn ignition switch OFF.

2. Disconnect EPS control unit harness connector.

3. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or

replace terminal.

Is the inspection result normal?

YES

>> Replace EPS control unit. Refer to 

STC-40, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning component.

EPS control unit

—

Continuity

Connector

Terminal

M54

15

Ground

Yes

EPS control unit

—

Voltage

Connector

Terminal

M54

14

Ground

Approx. 2.5 V

16

EPS control unit

—

Voltage

Connector

Terminal

M54

14

Ground

1.6 V – 3.4 V

(The value is changed according to 

steering left or right)

16