Nissan Sentra Service Manual: Unbalance steering wheel turning force (torque variation)
Description
Unbalance steering wheel turning force (torque variation).
Diagnosis Procedure
1.PERFORM SELF-DIAGNOSIS
With CONSULT
-
Turn the ignition switch OFF to ON.
-
Perform EPS self-diagnosis.
Is any DTC detected? YES >> Check the DTC. Refer to STC-14, "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-31, "Diagnosis Procedure".
3.CHECK STEERING COLUMN AND STEERING GEAR
Check the steering column assembly and steering gear assembly.
-
Steering column assembly. Refer to ST-12, "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
-
Start the engine.
CAUTION:
Never drive the vehicle.
-
Turn steering wheel from full left stop to full right stop.
-
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-22, "Diagnosis Procedure".
6.CHECK EPS CONTROL UNIT SIGNAL (3)
With CONSULT
-
Select ASSIST LEVEL in DATA MONITOR in EPS.
-
Stop the EPS system until the item in DATA MONITOR becomes 100%.
NOTE:
While stopping the EPS system, do not turn steering wheel.
-
Check that the symptom continues.
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
-
Start the engine.
CAUTION:
Never drive the vehicle.
-
Turn steering wheel from full left stop to full right stop.
-
Select TORQUE SENSOR in DATA MONITOR in EPS.
-
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-27, "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".
Unbalance steering wheel turning force and return between right
and left
Description
Unbalance steering wheel turning force and return between right
and left.
Diagnosis Procedure
1.CHECK THE ILLUMINATION OF THE EPS WARNING LAMP
Check the EPS warning lamp while engine ...
Removal and installation
EPS control unit
Exploded View
Steering column assembly
EPS control unit
Bracket plate
Front
Removal and Installation
REMOVAL
CAUTION:
Disconnect battery negative terminal ...
Other materials:
Description
NOTE:
This vehicle is diagnosed using the CONSULT-III plus.
When CONSULT is connected with a data link connector
equipped on the vehicle side, it will communicate with the control
unit equipped in the vehicle and then enable various kinds of diagnostic
tests.
Instrument lower panel LH ...
Precaution
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”,
used along
with a front seat belt, helps to reduce the risk or severity of injury to th ...
Vacuum lines
Exploded View
Clamp
Vacuum hose (built-in check valve)
Vacuum piping
Vacuum hose
To intake manifold side
Paint mark
Stamp indicating engine direction
To brake booster
Removal and Installation
REMOVAL
Remove air duct and air cleaner case. Refer to EM-25, "Remova ...
