vin NISSAN TIIDA 2009 Service Repair Manual

STC
N
O P
Symptom Chart
INFOID:0000000004307297
If EPS warning lamp turns ON, perform self-diagnosis. Refer to STC-11, " CONSULT-III Function (EPS) " .
Symptom Condition Check item Reference page
EPS warning lamp does not turn ON when ig-
nition switch to “ON”.
(EPS warning lamp check) Ignition switch: ONCAN communication line
STC-21 Combination meter
EPS warning lamp does not turn OFF for sev-
eral seconds after starting the engine Engine runningCAN communication line
STC-21 Power supply and ground for
EPS control unit
Torque sensor
EPS motor
Vehicle speed signal
Engine status signal
Combination meter
Steering wheel turning force is heavy or light,
while driving • While driving
• Steering wheel turning CAN communication line
STC-22 Vehicle speed signal
Engine status signal
EPS motor
Steering wheel turning force
(Mechanical malfunction)
Unbalance steering wheel turning force and
return between right and left, while driving • While driving
• Steering wheel turning Wheel alignment
STC-23 Steering wheel
turning force
(Mechanical malfunction)
Unbalance steering wheel turning force,
while driving (Torque variation) • While driving
• Steering wheel turning Steering column intermediate
shaft installation condition STC-24 Steering wheel
turning force
(Mechanical malfunction)

STC-22< SERVICE INFORMATION >
[EPS]
TROUBLE DIAGNOSIS FOR SYMPTOMS
5. Turn ignition switch “OFF”.
6. Check voltage between EPS control unit harness connector (A) terminals and ground.
7. Connect EPS control unit harness connector.
OK or NG OK >> GO TO 3.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
• 60 A fusible link (No. m, located in the fuse and fusible link block). Refer to PG-3 .
• 10 A fuse [No. 2, located in the fuse block (J/B)]. Refer to PG-3 .
• Harness for short or open between battery and EPS control unit harness connector M54 termi-
nal 17.
• Harness for short or open between ignition switch and EPS control unit harness connector M53 terminal 10. 3.
CHECK EPS CONTROL UNIT GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect EPS control unit harness connector.
3. Check continuity between EP S control unit harness connector
(A) terminal and ground.
Also check harness for short to power.
4. Connect EPS control unit harness connector.
OK or NG OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 4.
CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to STC-9, " EPS Control Unit Input/Output Signal Reference
Value " .
OK or NG OK >> GO TO 5.
NG >> Check EPS control unit pin terminals for dam age or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts. 5.
SYMPTOM CHECK
Check again.
OK or NG OK >>
INSPECTION END
NG >> Replace combination meter. Refer to DI-19, " Removal and Installation " .
Steering Wheel Turning Fo rce Is Heavy or Light INFOID:0000000004307309
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-11, " CONSULT-III F
unction (EPS) " .
Connector Terminal Voltage
M53 10 – Ground Approx. 0 V
M54 17 – Ground Battery voltage SGIA1627E
Connector Terminal Continuity
M54 18 YES SGIA1628E

YES >> GO TO 2.
NO >> Go to STC-21, " EPS Warning Lamp Does Not Turn OFF " .
Wheel Alignment Inspection " .
OK or NG OK >> GO TO 3.
NG >> Adjust wheel alignment. Refer to FSU-7, " Wheel Alignment Inspection " .
EPS Control Unit Input/Output Signal Reference
Value " .
OK or NG OK >> GO TO 4.
NG >> Check EPS control unit pin terminals for dam age or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts. OK >>
INSPECTION END
NG >> Check the steering wheel turning force because there may be mechanical malfunction. Refer to
PS-6, " On-Vehicle Inspection and Service " .
Unbalance Steering Wheel Turn ing Force (Torque Variation) INFOID:0000000004307311
SYMPTOM:
Unbalance steering wheel turning for ce, while driving (Torque variation).
DIAGNOSTIC PROCEDURE YES >> GO TO 2.
NO >> Go to STC-21, " EPS Warning Lamp Does Not Turn OFF " .
Removal and Installation " .
OK or NG OK >> GO TO 3.
NG >> Repair or replace damaged parts. EPS Control Unit Input/Output Signal Reference
Value " .
OK or NG OK >> GO TO 4.
NG >> Check EPS control unit pin terminals for dam age or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.

OK >> GO TO 4.
NG >> Repair or replace damaged parts. OK >> Carry out self-diagnosis.
NG >> Replace battery in transmitter activation tool.
Self-Diagnosis (With CONSULT-III) INFOID:0000000004307329
DESCRIPTION
During driving, the tire pressure monitoring system receives the signal transmitted from the transmitter
installed in each wheel, and turns on the low tire pressure warning lamp when the tire pressure becomes low.
The control unit (BCM) for this system has pressure judgement and self-diagnosis functions.
FUNCTION
When the tire pressure monitoring syst em detects low inflation pressure or an internal malfunction, the low tire
pressure warning lamp in the combination meter comes on. The malfunction location is indicated by the low
tire pressure warning lamp flashing and the buzzer sounding.
CONSULT-III Application to Tire Pressure Monitoring System
× : Applicable
– : Not applicable
Self-Diagnostic Results Mode ITEM SELF-DIAGNOSTIC RESULTS DATA MONITOR
Front - Left transmitter × ×
Front - Right transmitter × ×
Rear - Left transmitter × ×
Rear - Right transmitter × ×
Warning lamp — ×
Vehicle speed × ×
Buzzer (in combination meter) — ×
CAN Communication × × 8, " System Description " .

WW-2< SERVICE INFORMATION >
PRECAUTION
SERVICE INFORMATION
PRECAUTION
Precaution for Supplemental Restraint Syst em (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000004306902
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty 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 w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, 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 NISS AN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SRS section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified by yellow and/or orange harnesses or har-
ness connectors.
Precaution for Procedure without Cowl Top Cover INFOID:0000000004306903
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc. PIIB3706J