Nissan Versa Note. Manual - part 767

DIAGNOSIS AND REPAIR WORKFLOW

STC-17

< BASIC INSPECTION >

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

Other conditions

Memo

Interview sheet

Customer 
name

MR/MS

Registration 
number

Initial year 
registration 

Vehicle type

VIN

Storage date

Engine

Mileage

km (Mile)

STC-18

< DTC/CIRCUIT DIAGNOSIS >

C1601 BATTERY POWER SUPPLY

DTC/CIRCUIT DIAGNOSIS

C1601 BATTERY POWER SUPPLY

DTC Logic

INFOID:0000000009667181

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 “C1601” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-18, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009667182

Regarding Wiring Diagram information, refer to 

STC-11, "Wiring Diagram"

.

1.

CHECK EPS CONTROL UNIT GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect EPS control unit harness connector.

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

4. Connect EPS control unit harness connector.
Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT (1)

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

DTC

Display item

Malfunction detected condition

Possible cause

C1601

BATTERY VOLT

When a power supply voltage to the EPS control unit 
is maintained at 17.5 V or more or at less than 9V 
continuously for five second or more.

• Harness or connector
• EPS control unit
• Fuse
• Power supply system
• Battery

EPS control unit

—

Continuity

Connector

Terminal

E23

18

Ground

Yes

C1601 BATTERY POWER SUPPLY

STC-19

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

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-17, "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-5, "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

STC-20

< DTC/CIRCUIT DIAGNOSIS >

C1601 BATTERY POWER SUPPLY

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-37, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning component.