Nissan Pathfinder. Manual — part 1129

STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT

STC-33

< SYMPTOM DIAGNOSIS >

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STC

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6.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (5)

With CONSULT

Select “STR ANG SPD” in “DATA MONITOR” of “EPS”.

Is the check result normal?

YES

>> GO TO 7.

NO

>> Check the steering angle sensor. Refer to

STC-21, "Diagnosis Procedure"

.

7.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (6)

With CONSULT

Select “ENGINE STATUS” in “DATA MONITOR” of “EPS”.
Is the display value “RUN”?

YES

>> GO TO 8.

NO

>> Check the ECM. Refer to

EC-61, "CONSULT Function"

.

8.

CHECK THE STEERING FORCE

Check the steering force. Refer to

STC-34, "Diagnosis Procedure"

.

Is the check result normal?

YES

>> Inspection End.

NO

>> It is possible that there is a mechanical malfunction. Check the steering system.

Monitor item

Test condition

Display value

STR ANG SPD

The steering wheel is not
steered.

Approx. 0.0 deg/s

The steering wheel is steered.

Displays steering angle speed
(deg/s)

STC-34

< SYMPTOM DIAGNOSIS >

UNBALANCE STEERING WHEEL TURNING FORCE AND RETURN BETWEEN

RIGHT AND LEFT

UNBALANCE STEERING WHEEL TURNING FORCE AND RETURN BE-
TWEEN RIGHT AND LEFT

Diagnosis Procedure

INFOID:0000000009177157

1.

CHECK THE ILLUMINATION OF THE HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING

LAMP
Check the hydraulic pump electric power steering warning lamp while engine is running.
Does the hydraulic pump electric power steering warning lamp turn OFF?

YES

>> GO TO 2.

NO

>> Refer to

STC-31, "Diagnosis Procedure"

.

2.

CHECK WHEEL ALIGNMENT

Check the wheel alignment. Refer to

FSU-19, "Wheel Alignment"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Adjustment of wheel alignment. Refer to

FSU-19, "Wheel Alignment"

.

3.

CHECK STEERING WHEEL TURNING FORCE

Check the steering wheel turning force. Refer to

STC-35, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Inspection End.

NO

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

STC-32, "Diagnosis

Procedure"

.

UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)

STC-35

< SYMPTOM DIAGNOSIS >

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H

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STC

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UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIA-
TION)

Diagnosis Procedure

INFOID:0000000009177158

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

Perform “EPS” self-diagnosis.
Is a malfunctioning system displayed?

YES

>> Check malfunctioning system. Refer to

STC-13, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (1)

With CONSULT

1. Start the engine.

CAUTION:

Never drive the vehicle.

2. Turn the steering wheel until it stops.

3. Select “MTR ASSIST” in “DATA MONITOR” of “EPS”.
Is the display value “100%”?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (2)

With CONSULT

1. Select “C/U TEMP” and “C/U TEMP A” in “DATA MONITOR” of “EPS”.

2. Stop the system until the DATA MONITOR display value drops to “90

°C (194°F)” or less.

3. Check whether symptom continues.
Did symptom continue?

YES

>> GO TO 4.

NO

>> This occurs because the protection function lowers the assist force. It is not a system malfunction.

Inspection End.

4.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (3)

With CONSULT

1. Turn the steering wheel to the straight-ahead position. (There is no steering force.)

2. Select “BATTERY VOLT” in “DATA MONITOR” of “EPS”.
Is the display value “10.5 V” or more?

YES

>> GO TO 5.

NO

>> Check the battery power system. Refer to

STC-22, "Diagnosis Procedure"

.

5.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (4)

With CONSULT

Select in “ESTM VHCL SPD” in “DATA MONITOR” of “EPS”.

*: This may not agree with the speedometer indication immediately after the ignition switch is turned ON. This

is not a malfunction.
Is the check result normal?

YES

>> GO TO 6.

Monitor item

Test condition

Display value

ESTM VHCL SPD

When stopped

0.00 km/h or mph

While driving

Approximately equal to the in-
dication on speedometer

*

(Inside of

±10%)

STC-36

< SYMPTOM DIAGNOSIS >

UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)

NO

>> Check the combination meter, ABS actuator and electric unit (control unit). Refer to

MWI-19,

"CONSULT Function (METER/M&A)"

and

STC-10, "CONSULT Function"

.

6.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (5)

With CONSULT

Select “STR ANG SPD” in “DATA MONITOR” of “EPS”.

Is the check result normal?

YES

>> GO TO 7.

NO

>> Check the steering angle sensor. Refer to

STC-21, "Diagnosis Procedure"

.

7.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (6)

With CONSULT

Select “ENGINE STATUS” in “DATA MONITOR” of “EPS”.
Is the display value “RUN”?

YES

>> GO TO 8.

NO

>> Check the ECM. Refer to

EC-61, "CONSULT Function"

.

8.

CHECK STEERING COLUMN AND STEERING GEAR

Check the steering column assembly and steering gear assembly.

• Steering column assembly. Refer to

ST-60, "Steering Column"

.

• Steering gear assembly. Refer to

ST-61, "Power Steering Gear"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace malfunctioning component.

9.

CHECK STEERING WHEEL TURNING FORCE

Check the steering wheel turning force. Refer to

STC-32, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Inspection End.

NO

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

STC-32, "Diagnosis

Procedure"

.

Monitor item

Test condition

Display value

STR ANG SPD

The steering wheel is not turn-
ing.

Approx. 0.0 deg/s

The steering wheel is being
turned.

Displays steering angle speed
(deg/s)