steering wheel NISSAN TIIDA 2007 Service Owners Manual

TROUBLE DIAGNOSIS FOR SYSTEM
STC-21
[EPS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: June 20062007 Versa
DTC C1606 EPS MOTORUGS0008L
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
* : Almost in accordance with the value of “MOTOR SIG”. It is not a malfunction though these values are not accorded when steering
quickly.
EPS CONTROL UNIT TERMINALS AND REFERENCE VALUE
Data are reference value and are measured between each terminal and ground.
CAUTION:
When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.
DIAGNOSTIC PROCEDURE
1. CHECK EPS MOTOR SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “EPS” with CONSULT-II.
3. Check the values of “MOTOR SIG” and “MOTOR CURRENT”. Refer to STC-11, "
SPECIFICATIONS
WITH CONSULT-II" .
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. CHECK EPS MOTOR
1. Turn ignition switch “OFF”.
2. Disconnect EPS control unit harness connector.
3. Check resistance between EPS control unit harness connector
(A) terminals.
4. Connect EPS control unit harness connector.
OK or NG
OK >> GO TO 3.
NG >> EPS motor is malfunctioning. Replace steering column
assembly. Refer to PS-9, "
Removal and Installation" .
Monitor item (Unit) Content Condition Display value
MOTOR SIG (A)Command current to
EPS motorEngine runningSteering wheel: Not steering
(There is no steering force)0.00 A
Steering wheel: Steering0 – 65.00 A
(The value is changed
according to steering left
or right)
MOTOR CURRENT (A)Consumption current of
EPS motorEngine runningSteering wheel: Not steering
(There is no steering force)0.00 A
Steering wheel: Steering0 – 65.00 A *
(The value is changed
according to steering left
or right)
Terminal Wire color Item Condition Data (Approx.)
19 — Motor (+) — —
20 — Motor (−)— —
Connector Terminal Resistance
M60 19 – 20 Approx. 0.1 Ω or less
SGIA1630E

TROUBLE DIAGNOSIS FOR SYMPTOMS
STC-29
[EPS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: June 20062007 Versa
Steering Wheel Turning Force is Heavy or LightUGS0008U
SYMPTOM:
Steering wheel turning force is heavy or light, while driving.
DIAGNOSTIC PROCEDURE
1. CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to STC-13, "
SELF-DIAG RESULTS MODE" .
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Perform trouble diagnosis for CAN communication line. Refer to STC-24, "DTC U1000 CAN
COMM CIRCUIT" .
NO-1 >> With ABS: GO TO 2.
NO-2 >> Without ABS: GO TO 3.
2. CHECK VEHICLE SPEED SIGNAL FROM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to BRC-20, "
SELF-DIAGNO-
SIS" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 4.
3. CHECK VEHICLE SPEED SIGNAL FROM TRANSMISSON CONTROL MODULE (TCM)
Perform self-diagnosis with TCM. Refer to AT-82, "
SELF-DIAGNOSTIC RESULT MODE" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 4.
4. CHECK COMBINATION METER SIGNAL
Perform self-diagnosis with combination meter. Refer to DI-14, "
SELF-DIAGNOSTIC RESULTS" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 5.
5. CHECK ENGINE STATUS SIGNAL
Perform self-diagnosis for ECM. Refer to EC-116, "
SELF-DIAG RESULTS MODE" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 6.
6. CHECK EPS MOTOR SYSTEM
Perform trouble diagnosis for EPS motor. Refer to STC-21, "
DTC C1606 EPS MOTOR" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7. CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to STC-11, "
EPS Control Unit Input/Output Signal Reference
Va lu e s" .
OK or NG
OK >> GO TO 8.
NG >> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.

STC-30
[EPS]
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: June 20062007 Versa
8. SYMPTOM CHECK
Check again.
OK or NG
OK >>INSPECTION END
NG >> Check the steering wheel turning force because there may be mechanical malfunction. Refer to
PS-6, "
CHECKING STEERING WHEEL TURNING FORCE" .

TROUBLE DIAGNOSIS FOR SYMPTOMS
STC-31
[EPS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: June 20062007 Versa
Unbalance Steering Wheel Turning Force and Return Between Right and LeftUGS0008V
SYMPTOM:
Unbalance steering wheel turning force and return between right and left, while driving.
DIAGNOSTIC PROCEDURE
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 STC-27, "
EPS Warning Lamp Does Not Turn OFF" .
2. CHECK WHEEL ALIGNMENT
Check wheel alignment. Refer to FSU-6, "
Wheel Alignment Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Adjust wheel alignment. Refer to FSU-6, "
Wheel Alignment Inspection" .
3. CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to STC-11, "
EPS Control Unit Input/Output Signal Reference
Va lu e s" .
OK or NG
OK >> GO TO 4.
NG >> 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.
OK or NG
OK >>INSPECTION END
NG >> Check the steering wheel turning force because there may be mechanical malfunction. Refer to
PS-6, "
CHECKING STEERING WHEEL TURNING FORCE" .

STC-32
[EPS]
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: June 20062007 Versa
Unbalance Steering Wheel Turning Force (Torque Variation)UGS0008W
SYMPTOM:
Unbalance steering wheel turning force, while driving (Torque variation).
DIAGNOSTIC PROCEDURE
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 STC-27, "
EPS Warning Lamp Does Not Turn OFF" .
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 PS-9, "
COMPONENT" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to STC-11, "
EPS Control Unit Input/Output Signal Reference
Values" .
OK or NG
OK >> GO TO 4.
NG >> 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.
OK or NG
OK >>INSPECTION END
NG >> Check the steering wheel turning force because there may be mechanical malfunction. Refer to
PS-6, "
CHECKING STEERING WHEEL TURNING FORCE" .

WT-4
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: June 20062007 Versa
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEES002D6
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
FA X - 5WT-5

WT-6
WT-29—
—
—
—
FAX -4, "
NVH Troubleshooting Chart
",
FSU-5, "
NVH Troubleshooting Chart
"
RAX-3, "
NVH Troubleshooting Chart
",
RSU-4, "
NVH Troubleshooting Chart
"
Refer to TIRES in this chart
Refer to ROAD WHEEL in this chart
FAX -4, "
NVH Troubleshooting Chart
"
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Trouble Shooting Chart
"
Possible cause and SUSPECTED PARTS
Improper installation, looseness
Out-of-round
Imbalance
Incorrect tire pressure
Uneven tire wear
Deformation or damage
Non-uniformity
Incorrect tire size
FRONT AXLE AND FRONT SUSPENSION
REAR AXLE AND REAR SUSPENSION
TIRES
ROAD WHEELS
DRIVE SHAFT
BRAKE
STEERING
SymptomTIRESNoise× ×××××× × × ××××
Shake× ××××× × × × ××××
Vibration××××××
Shimmy× ××××××× × × × ××
Shudder× ××××× × × × × ××
Poor quality
ride or handling× ××××× × × × ×
ROAD WHEELNoise××× × × × × ×××
Shake××× × × × × ×××
Shimmy, Shud-
der×××× ×××××
Poor quality
ride or handling××× × × × ×