Nissan Versa Sedan. Manual — part 764

STC-38

< SYMPTOM DIAGNOSIS >

UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)

UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIA-
TION)

Description

INFOID:0000000009267390

Unbalance steering wheel turning force (torque variation).

Diagnosis Procedure

INFOID:0000000009267391

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

1. Turn the ignition switch OFF to ON.

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

YES

>> Check the DTC. Refer to

STC-13, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK THE ILLUMINATION OF THE EPS WARNING LAMP

Check the EPS warning lamp while the engine is started.
Does the EPS warning lamp turn OFF?

YES

>> GO TO 3.

NO

>> Refer to

STC-34, "Diagnosis Procedure"

.

3.

CHECK STEERING COLUMN AND STEERING GEAR

Check the steering column assembly and steering gear assembly.

• Steering column assembly. Refer to

ST-9, "Exploded View"

.

• Steering gear assembly. Refer to

ST-14, "Exploded View"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace the malfunctioning component.

4.

CHECK EPS CONTROL UNIT SIGNAL (1)

With CONSULT

1. Start the engine.

CAUTION:

Never drive the vehicle.

2. Turn steering wheel from full left stop to full right stop.

3. Select “ASSIST LEVEL” in “DATA MONITOR” in “EPS”.
Does the item in “DATA MONITOR” maintain “100%”?

YES

>> GO TO 7.

NO

>> GO TO 5.

5.

CHECK EPS CONTROL UNIT SIGNAL (2)

With CONSULT

Select “BATTERY VOLT” in “DATA MONITOR” in “EPS”.
Does the item in “DATA MONITOR” indicate “10 V” or more?

YES

>> GO TO 6.

NO

>> Perform trouble diagnosis of EPS control unit power supply and ground. Refer to

STC-21, "Diag-

nosis Procedure"

.

6.

CHECK EPS CONTROL UNIT SIGNAL (3)

With CONSULT

1. Select “ASSIST LEVEL” in “DATA MONITOR” in “EPS”.

2. Stop the EPS system until the item in “DATA MONITOR” becomes “100%”.

NOTE:

While stopping the EPS system, do not turn steering wheel.

3. Check that the symptom continues.

UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)

STC-39

< SYMPTOM DIAGNOSIS >

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Does the symptom continue?

YES

>> GO TO 7.

NO

>> The assist torque decreases because of protection function. This is not a malfunction. Inspection

End.

7.

CHECK EPS CONTROL UNIT SIGNAL (4)

With CONSULT

1. Start the engine.

CAUTION:

Never drive the vehicle.

2. Turn steering wheel from full left stop to full right stop.

3. Select “TORQUE SENSOR” in “DATA MONITOR” in “EPS”.

4. Perform the torque sensor inspection.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 8.

8.

CHECK EPS MOTOR

Perform the trouble diagnosis of EPS motor. Refer to

STC-26, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace the malfunctioning component.

9.

CHECK STEERING WHEEL TURNING FORCE

Check the steering wheel turning force. Refer to

ST-5, "Inspection"

.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Check the steering wheel turning force for mechanical malfunction. Refer to

ST-5, "Inspection"

.

Monitor item

Condition

Display value

TORQUE SENSOR

Steering wheel: Not steer-
ing (There is no steering
force)

Approx. 0 Nm

Steering wheel: Right turn Positive value (Nm)

Steering wheel: Left turn

Negative value (Nm)

STC-40

< REMOVAL AND INSTALLATION >

EPS CONTROL UNIT

REMOVAL AND INSTALLATION

EPS CONTROL UNIT

Exploded View

INFOID:0000000009267392

Removal and Installation

INFOID:0000000009267393

REMOVAL

1. Perform a CPU memory erase on the EPS with CONSULT before removal.

CAUTION:

• Disconnect battery negative terminal before continuing.

• Do not shock EPS control unit, e.g. drop or hit.

• Do not get EPS control unit wet with water or other liquid. Also, do not give EPS control unit a

radical temperature change to avoid getting water drops.

• Do not disassemble or remodel EPS control unit, EPS motor, torque sensor, harness and con-

nectors.

2. Remove instrument lower panel LH. Refer to

IP-20, "Removal and Installation"

.

3. Disconnect harness connectors from EPS control unit.

CAUTION:

Hold and pull the connector housing, do not pull on harness when disconnecting connectors.

Also, do not grip, collapse or apply excessive force to the connector.

4. Remove EPS control unit from steering column assembly.
5. Remove bracket from steering column assembly if necessary.

INSTALLATION

Installation is in the reverse order of removal.

• Check that harness is not damaged when installing EPS control unit. Also, check that EPS control unit is

installed without trapping harness on foreign materials.

• After installing steering column assembly, perform self-diagnosis with CONSULT to ensure correct opera-

tion.

1.

Steering column assembly

2.

Bracket

3.

EPS control unit

JPGIB0004GB

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ENGINE

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SECTION

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CONTENTS

STARTING SYSTEM

PRECAUTION . . . . . . . . . . . ...

2

PRECAUTIONS . . . . . . . . . . . . ...

2

Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" . . . . . . . . . . . . . . . . ...

2

PREPARATION . . . . . . . . . . .

3

PREPARATION . . . . . . . . . . . . ...

3

Special Service Tool . . . . . . . . . . . .....

3

Commercial Service Tools . . . . . . . . . ....

3

SYSTEM DESCRIPTION . . . . . . . ..

4

COMPONENT PARTS . . . . . . . . . .

4

STARTING SYSTEM (WITHOUT INTELLIGENT
KEY) . . . . . . . . . . . . . . . . . . .....

4

STARTING SYSTEM (WITHOUT INTELLIGENT
KEY) : Component Parts Location . . . . . . ....

4

STARTING SYSTEM (WITHOUT INTELLIGENT
KEY) : Component Description . . . . . . . ....

5

STARTING SYSTEM (WITH INTELLIGENT KEY) . ..

5

STARTING SYSTEM (WITH INTELLIGENT KEY)
: Component Parts Location . . . . . . . . . ..

6

STARTING SYSTEM (WITH INTELLIGENT KEY)
: Component Description . . . . . . . . . . ..

6

SYSTEM . . . . . . . . . . . . . . . ..

8

STARTING SYSTEM (WITHOUT INTELLIGENT
KEY) . . . . . . . . . . . . . . . . . . .....

8

STARTING SYSTEM (WITHOUT INTELLIGENT
KEY) : System Diagram . . . . . . . . . . ....

8

STARTING SYSTEM (WITHOUT INTELLIGENT
KEY) : System Description . . . . . . . . . ....

8

STARTING SYSTEM (WITH INTELLIGENT KEY) . ..

8

STARTING SYSTEM (WITH INTELLIGENT KEY)
: System Diagram . . . . . . . . . . . . . ..

9

STARTING SYSTEM (WITH INTELLIGENT KEY)
: System Description . . . . . . . . . . . . .

9

WIRING DIAGRAM . . . . . . . . . ..

10

STARTING SYSTEM . . . . . . . . . . .

10

Wiring Diagram - With Intelligent Key System . . .

10

Wiring Diagram - Without Intelligent Key System .

15

BASIC INSPECTION . . . . . . . . ...

20

DIAGNOSIS AND REPAIR WORKFLOW . .

20

Work Flow (With GR8-1200 NI) . . . . . . . ...

20

Work Flow (Without GR8-1200 NI) . . . . . . ..

24

DTC/CIRCUIT DIAGNOSIS . . . . . . .

26

B TERMINAL CIRCUIT . . . . . . . . . .

26

Description . . . . . . . . . . . . . . . ...

26

Diagnosis Procedure . . . . . . . . . . . ...

26

S CONNECTOR CIRCUIT . . . . . . . . .

28

Description . . . . . . . . . . . . . . . ...

28

Diagnosis Procedure . . . . . . . . . . . ...

28

SYMPTOM DIAGNOSIS . . . . . . . ..

29

STARTING SYSTEM . . . . . . . . . . .

29

Symptom Table . . . . . . . . . . . . . ...

29

REMOVAL AND INSTALLATION . . . ...

30

STARTER MOTOR . . . . . . . . . . ...

30

Exploded View . . . . . . . . . . . . . . .

30

Removal and Installation . . . . . . . . . . .

31

Inspection and Adjustment . . . . . . . . . ..

31

SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . .

36

SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . . . .

36

Starter Motor . . . . . . . . . . . . . . .

36