Nissan Qashqai (2007-2010). Manual — part 757
STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT
STC-27
< SYMPTOM DIAGNOSIS >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT
Diagnosis Procedure
INFOID:0000000000940537
1.
CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to
STC-7, "CONSULT-III Function (EPS)"
Is the “CAN COMM CIRCUIT [U1000]” displayed.
YES
>> Perform trouble diagnosis for CAN communication line. Refer to
.
NO
>> GO TO 2.
2.
CHECK VEHICLE SPEED SIGNAL FROM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform self-diagnosis with ABS actuator and electric unit (control unit).
• Without ESP models:
BRC-17, "CONSULT-III Function (ABS)"
• With ESP models:
BRC-96, "CONSULT-III Function (ABS)"
Is any malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 3.
3.
CHECK COMBINATION METER SIGNAL
Perform self-diagnosis with combination meter. Refer to
MWI-23, "CONSULT-III Function (METER/M&A)"
.
Is the malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 4.
4.
CHECK ENGINE STATUS SIGNAL
Perform self-diagnosis with ECM.
• HR16DE (with EURO-OBD):
EC-100, "CONSULT-III Function"
.
• HR16DE (Without EURO-OBD):
EC-430, "CONSULT-III Function"
• MR20DE (with EURO-OBD):
EC-719, "CONSULT-III Function"
.
• MR20DE (without EURO-OBD):
EC-1054, "CONSULT-III Function"
EC-1315, "Diagnosis Description"
Is the malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 5.
5.
CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
6.
CHECK STEERING WHEEL TURNING FORCE
Check steering wheel turning force. Refer to
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace malfunctioning components.
7.
SYMPTOM CHECK
Check again.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Check the steering wheel turning force for mechanical malfunction. Refer to
STC-28
< 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:0000000000940538
1.
CHECK EPS WARNING LAMP
Confirm EPS warning lamp during engine running.
Does EPS warning lamp turn OFF?
YES
>> GO TO 2.
NO
>> Go to
2.
CHECK WHEEL ALIGNMENT
Check wheel alignment. Refer to
FSU-7, "Wheel Alignment Inspection"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Adjust wheel alignment. Refer to
FSU-7, "Wheel Alignment Inspection"
.
3.
CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
4.
CHECK STEERING WHEEL TURNING FORCE
Check steering wheel turning force. Refer to
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace malfunctioning components.
5.
SYMPTOM CHECK
Check again.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Check the steering wheel turning force for mechanical malfunction. Refer to
UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)
STC-29
< SYMPTOM DIAGNOSIS >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
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UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIA-
TION)
Diagnosis Procedure
INFOID:0000000000940540
1.
CHECK EPS WARNING LAMP
Confirm EPS warning lamp during engine running.
Does EPS warning lamp turn OFF?
YES
>> GO TO 2.
NO
>> Go to
2.
CHECK STEERING COLUMN INTERMEDIATE SHAFT
Check the connection between intermediate shaft and the mounting part of steering column assembly and
steering gear assembly. Refer to
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
4.
SYMPTOM CHECK
Check again.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Check the steering wheel turning force for mechanical malfunction. Refer to
STC-30
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001115248
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 the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRC and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SRC section.
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000001115249
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″
LOCK
″
position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1.
Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2.
Use the Intelligent Key or mechanical key to turn the ignition switch to the
″
ACC
″
position. At this time, the
steering lock will be released.
3.
Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4.
Perform the necessary repair operation.
5.
When the repair work is completed, return the ignition switch to the
″
LOCK
″
position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6.
Perform a self-diagnosis check of all control units using CONSULT-III.
Service Notice or Precautions for EPS System
INFOID:0000000000940487
CAUTION:
Check the following item when performing the trouble diagnosis.
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