2009 NISSAN LATIO warning

TROUBLE DIAGNOSIS FOR SYMPTOMS
STC-21
< SERVICE INFORMATION >
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TROUBLE DIAGNOSIS FOR SYMPTOMS
EPS Warning Lamp Does Not Turn ON INFOID:0000000004307307
SYMPTOM: EPS warning lamp does not turn ON when ignition switch to “ON”.
DIAGNOSTIC PROCEDURE 1.
CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to STC-11, " CONSULT-III Function (EPS) " .
Is the “ CAN COMM CIRCUIT [U1000] ” displayed?
YES >> Perform trouble diagnosis for CAN communication line. Refer to
STC-19, " DTC U1000 CAN
COMM CIRCUIT " .
NO >> GO TO 2. 2.
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 3.
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. 3.
SYMPTOM CHECK
Check again.
OK or NG OK >>
INSPECTION END
NG >> Replace combination meter. Refer to DI-19, " Removal and Installation " .
EPS Warning Lamp Does Not Turn OFF INFOID:0000000004307308
SYMPTOM: EPS warning lamp does not turn OFF for several seconds after starting the engine.
DIAGNOSTIC PROCEDURE 1.
CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to STC-11, " CONSULT-III Function (EPS) " .
Is any malfunction detected by self-diagnosis? YES >> Check the malfunctioning system.
NO >> GO TO 2. 2.
CHECK EPS CONTROL UNI T POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect EPS control unit harness connector.
3. Turn ignition switch “ON”. (Do not start engine.)
4. Check voltage between EPS control unit harness connector (A) terminals and ground.
Connector Terminal VoltageM53 10 – Ground Battery voltage
M54 17 – Ground Battery voltage SGIA1626E

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.

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CONTENTS
ROAD WHEELS & TIRES
SERVICE INFORMATION .. ..........................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution Necessary fo r Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
2
PREPARATION .............................................. .....4
Special Service Tool ........................................... ......4
Commercial Service Tool .................................... ......4
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ........................ .....5
NVH Troubleshooting Chart ................................ ......5
ROAD WHEEL ............................................... .....6
Inspection ............................................................ ......6
ROAD WHEEL TIRE ASSEMBLY ................. .....7
Balancing Wheels ............................................... ......7
Rotation ............................................................... ......7
TIRE PRESSURE MONITORING SYSTEM ... .....8
System Component ............................................. ......8
System Description ............................................. ......8
CAN COMMUNICATION ................................ ....10
System Description ............................................. ....10
TROUBLE DIAGNOSES ................................ ....11
Wiring Diagram- T/WARN - ................................. ....11
Terminal and Reference Value for BCM ............. ....11
ID Registration Procedure ................................... ....12 Transmitter Wake Up Oper
ation ..............................13
CONSULT-III Function (B CM) .................................13
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ................................................... ....
14
Preliminary Check ............................................... ....15
Self-Diagnosis (With CONSULT-III) .................... ....16
Self-Diagnosis (Without CONSULT-III) ............... ....17
TROUBLE DIAGNOSIS FOR SELF-DIAG-
NOSTIC ITEMS ................................................. 19
Data from Transmitter Not Being Received ......... ....19
Transmitter Malfunction ....................................... ....19
Transmitter Pressure Malf unction ............................20
Vehicle Speed Signal .......................................... ....20
Vehicle Ignition Signal ......................................... ....21
TROUBLE DIAGNOSIS FOR SYMPTOMS ...... 22
Low Tire Pressure Warning Lamp Does Not Come
On When Ignition Switch Is Turned On ............... ....
22
Low Tire Pressure Warnin g Lamp Stays On When
Ignition Switch Is Turned On ............................... ....
22
Low Tire Pressure Warning Lamp Flashes When
Ignition Switch Is Turned On ............................... ....
23
Hazard Warning Lamps Flash When Ignition
Switch Is Turned On ............................................ ....
24
ID Registration Cannot Be Completed ....................24
REMOVAL AND INSTALLATION ..................... 25
Transmitter (Pressure Sens or) ................................25
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................. 27
Road Wheel ......................................................... ....27
Tire ...................................................................... ....27

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A sensor-transmitter integrated with a valve is installed in each
wheel, and transmits a detected air pressure signal in the form of a
radio wave. The radio signal is received by the remote keyless entry
receiver.
REMOTE KEYLESS ENTRY RECEIVER The remote keyless entry receiver is shown with the glove box
removed. The remote keyless entry receiver receives the air pres-
sure signal transmitted by the transmitter in each wheel.
COMBINATION METER The combination meter receives tire pressure status from the BCM
using CAN communication. When a low tire pressure condition is
sensed by the BCM, the combination meter low tire pressure warn-
ing lamp is activated.
TIRE PRESSURE WARNING CHECK CONNECTOR The tire pressure warning check connector can be grounded in order to initiate self-diagnosis without a CON-
SULT-III. Refer to WT-17, " Self-Diagnosis (Without CONSULT-III) " . The tire pressure warning check connector
is located behind the lower portion of the instrument panel LH. Refer to PG-38, " Harness Layout " . WEIA0186E
LEIA0055E

TROUBLE DIAGNOSES
WT-13
< SERVICE INFORMATION >
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6. Inflate all tires to proper pressure. Refer to
WT-27, " Tire " .
Transmitter Wake Up Operation INFOID:0000000004307325
NOTE:
This procedure must be done after replacement of a low tire pressure warning transmitter or BCM.
New replacement transmitters are provided "asleep" and must first be "woken up" using Transmitter
Activation Tool J-45295 before ID registration can be performed.
1. Turn ignition switch ON. Push the transmitter activation tool against the tire near the front left transmitter. Press the button for
5 seconds. The hazard warning lamps flash per the diagram
below.
2. Repeat this procedure for each tire in the following order: FL, FR, RR, RL.
3. When the BCM finishes assigning each tire ID, the BCM flashes the hazard warning lamps and sends flashing indicator status by CAN according to the following time chart.
4. After completing wake up of all transmitters, make sure low tire pressure warning lamp goes out.
CONSULT-III Function (BCM) INFOID:0000000004307326
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following. Activation tire position CONSULT-III
Front LH “YET”↓
“DONE”
Front RH
Rear RH Rear LH Tool number : (J-45295)
LEIA0036E
WEIA0177E

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Preliminary Check
INFOID:0000000004307328
BASIC INSPECTION Tire " .
OK or NG OK >> GO TO 2.
NG >> Adjust tire pressure to specified value. YES >> GO TO 3.
NO >> GO TO WT-22, " Low Tire Pressure Warning Lamp Does Not Come On When Ignition Switch Is
Turned On " . Self-diagnosis :
WT-16 Trouble diagnosis for symptoms :
WT-22

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 " .

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NOTE:
Before performing the self-diagnosis, be sure to register the ID or else the actual malfunction location may be different from that dis-
played on CONSULT-III.
Data Monitor Mode
NOTE:
Before performing the self-diagnosis, be sure to register the ID, or the actual malfunction location may be different from that displayed on
CONSULT-III.
Self-Diagnosis (Without CONSULT-III) INFOID:0000000004307330
SELF DIAGNOSTIC PROCE DURE (WITHOUT CONSULT-III)
1. Turn ignition switch ON.
2. Ground the tire pressure warning check connector to initiate self diagnosis.
3. Compare the flashing pattern with the flash code chart below.
NOTE:
The system is normal when the low tire pressure warni ng lamp flashes 5 times and continues repeating. Self-
diagnosis results are erased automatically by turning the ignition switch “OFF”.
[CODE- ERR] - FL [C1720]
[CODE- ERR] - FR [C1721]
[CODE- ERR] - RR [C1722]
[CODE- ERR] - RL [C1723] Function code data from FL transmitter is malfunctioning.
Function code data from FR transmitter is malfunctioning.
Function code data from RR transmitter is malfunctioning.
Function code data from RL transmitter is malfunctioning. WT-19[BATT - VOLT - LOW] - FL [C1724]
[BATT - VOLT - LOW] - FR [C1725]
[BATT - VOLT - LOW] - RR [C1726]
[BATT - VOLT - LOW] - RL [C1727] Battery voltage of FL transmitter drops.
Battery voltage of FR transmitter drops.
Battery voltage of RR transmitter drops.
Battery voltage of RL transmitter drops. WT-19VHCL_SPEED_SIG_ERR [C1729] Vehicle
speed signal is in error.WT-20IGN_CIRCUIT_OPEN [C1735] Vehicle
ignition signal is in error. WT-21Diagnostic item Diagnostic item is detected when ···
Reference
page MONITOR CONDITION SPECIFICATION
VHCL SPEED Drive vehicle. Vehicle speed (km/h or MPH)
AIR PRESS FL
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL • Drive vehicle for a few minutes.
Tire pressure (kPa or psi)
or
• Ignition switch ON and activation tool is transmitting activation signals.
ID REGST FL1
ID REGST FR1
ID REGST RR1
ID REGST RL1 Ignition switch ON Registration ID: DONE
No registration ID: YET
WARNING LAMP Low tire pressure
warning lamp on: ON
Low tire pressure warning lamp off: OFF
BUZZER Buzzer in combination meter on: ON
Buzzer in combination meter off: OFF