Nissan Note E12. Instruction — part 604

UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)

STC-35

< SYMPTOM DIAGNOSIS >

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UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIA-
TION)

Description

INFOID:0000000009485809

Unbalance steering wheel turning force (torque variation).

Diagnosis Procedure

INFOID:0000000009485810

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-10, "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-29, "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 specific malfunctioning part.

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.
Dose 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-18, "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.

STC-36

< SYMPTOM DIAGNOSIS >

UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)

Dose the symptom continue?

YES

>> GO TO 7.

NO

>> The assist torque decreases because of protection function. This is not 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-23, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace the specific malfunctioning part.

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)

EPS CONTROL UNIT

STC-37

< REMOVAL AND INSTALLATION >

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REMOVAL AND INSTALLATION

EPS CONTROL UNIT

Exploded View

INFOID:0000000009016081

Removal and Installation

INFOID:0000000009016082

CAUTION:

• Do not allow EPS control unit to get wet with water, moisture or any other liquid. Also, protect the

EPS control unit from extreme temperatures.

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

tors.

REMOVAL

1. Disconnect the battery cable from the negative terminal. Refer to

PG-69, "Exploded View"

2. Remove instrument lower panel LH. Refer to

IP-24, "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 screws and EPS control unit from steering column.
5. Remove bolts and bracket plate from steering column if necessary.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Check that the harness connector, terminals and the EPS control unit are not visibly damaged before

installing the EPS control unit.

• Check that the harness connector, terminals and the EPS control unit are free of foreign materials

before installing.

• Replace the EPS control unit if it has been dropped or sustained an impact.

After installing steering column, perform self-diagnosis with CONSULT to ensure correct operation. Refer to

STC-6, "CONSULT Function"

.

1.

Steering column

2.

Bracket plate

3.

EPS control unit

Front

AWGIA0295ZZ

STR-1

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 . . . . . . . . . . . . ...

4

STARTING SYSTEM : Component Parts Location

. ..

4

STARTING SYSTEM : Component Description . ...

5

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

6

System Description . . . . . . . . . . . . ...

6

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

7

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

7

Wiring Diagram . . . . . . . . . . . . . .....

7

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

13

DIAGNOSIS AND REPAIR WORKFLOW . .

13

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

13

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

16

DTC/CIRCUIT DIAGNOSIS . . . . . . .

19

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

19

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

19

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

19

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

21

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

21

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

21

SYMPTOM DIAGNOSIS . . . . . . . ..

22

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

22

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

22

REMOVAL AND INSTALLATION . . . ...

23

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

23

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

23

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

23

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

24

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

24

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

24