2009 NISSAN LATIO ignition

CAN Com-
munication Inspection Using CONSULT-III (Self-Diagnosis) " .
SYMPTOM
Displayed “SELF-DIAG
RESULTS” on CON- SULT-III screen. DIAGNOSTIC PROCE-
DURE
(Reference page) SYSTEM
(Malfunctioning part or mode)
• Security indicator lighting up*
• Engine cannot be started CHAIN OF ECM-IMMU
[P1612] PROCEDURE 1
(BL-260 )
In rare case, “CHAIN OF ECM-IMMU” might be stored
during key registration procedure, even if the system is
not malfunctioning.
Open circuit in battery voltage line of BCM circuit
Open circuit in ignition line of BCM circuit
Open circuit in ground line of BCM circuit
Open or short circuit between BCM and ECM commu-
nication line
ECM
BCM
DIFFERENCE OF KEY [P1615] PROCEDURE 6
(BL-266 )
Unregistered ignition key is used.
BCM is malfunctioning.
CHAIN OF IMMU-KEY [P1614] PROCEDURE 2
(BL-262 )
Malfunction of key ID chip
Communication line between ANT/ AMP and BCM:
Open circuit or short circuit of battery voltage line or
ground line
Open circuit in power source line of ANT/ AMP circuit
Open circuit in ground line of ANT/ AMP circuit
NATS antenna amp.
BCM
ID DISCORD, IMM- ECM
[P1611] PROCEDURE 3
(BL-263 )
System initialization has not yet been completed.
ECM
LOCK MODE [P1610] PROCEDURE 5
(BL-265 )
When the starting operation is carried out five or more
times consecutively under the following conditions,
NATS will shift the mode to one which prevents the en-
gine from being started.
• Unregistered ignition key is used.
• BCM or ECM’s malfunctioning.
Security indicator
lighting up* DON'T ERASE BE-
FORE CHECKING ENG DIAG WORK FLOW
(BL-257 )
Engine trouble data and NATS trouble data have been
detected in ECM SYMPTOM
DIAGNOSTIC PROCEDURE
(Reference page) SYSTEM
(Malfunctioning part or mode)
Security indicator does not light up*. PROCEDURE 4
(BL-264 )
Security indictor.
Open circuit between Fuse and BCM
BCM

Removal and Installation of BCM " .
2. Perform initialization with CONSULT-III.
For initialization, refer to “CONSULT-III Operation Manual NATS”.
Does the engine start? Yes >> BCM is malfunctioning.
• Replace BCM. Refer to BCS-18, " Removal and Installation of BCM " .
• Perform initialization with CONSULT-III
• For initialization, refer to “CONSULT-III Operation Manual NATS”
No >> ECM is malfunctioning. • Replace ECM.
• Perform initialization or re-communicating function
• For initialization, refer to “CONSULT-III Operation Manual NATS”
• For re-communicating function, refer to BL-249, " ECM Re-communicating Function "
“ CHAIN OF IMMU-KEY ” displayed?
Yes >> GO TO 2
No >> GO TO BL-259, " Trouble Diagnosis " .
How to Replace NATS Antenna Amp " .
OK or NG OK >> GO TO 3
NG >> Reinstall NATS antenna amp. correctly. Yes >> Ignition key ID chip is malfunctioning.
• Replace the ignition key
• Perform initialization with CONSULT-III For initialization, refer to “CONSULT-III Operation Manual NATS”
No >> GO TO 4 OK >> GO TO 5
NG >> Check the following. • 20A fuse [No. 53, located in IPDM E/R]
• Harness for open or short between fuse and NATS
antenna amp.

“ DIFFERENCE OF KEY ” displayed?
YES >> GO TO 2
NO >> GO TO BL-259, " Trouble Diagnosis " .
YES >> • Ignition key ID was unregistered.
NO >> • BCM is malfunctioning.
• Replace BCM. Refer to BCS-18, " Removal and Installation of BCM " .
• Perform initialization with CONSULT-III.
• For initialization, refer to CONSULT-III Operation Manual.
How to Replace NATS Antenna Amp INFOID:0000000004305150
NOTE:
• If NATS antenna amp. is not installed correctly, NATS system
will not operate properly and SELF-DIAG RESULTS on CON-
SULT-III screen will show “LOCK MODE” or “CHAIN OF IMMU-
KEY”.
• Initialization is not necessary only when NATS antenna amp.
is replaced with a new one.

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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 al l control units using CONSULT-III.
Precaution for Brake System INFOID:0000000004305887
• Refill using recommended brake fluid. Refer to MA-14 .
• Never reuse drained brake fluid.
• Be careful not to splash brake fluid on painted surfac e of body. If brake fluid is splashed on painted surfaces
of body immediately wipe it off with cloth and then wash it away with water.
• To clean or wash all parts of master cylinder, disc brake caliper and wheel cylinder, use new brake fluid.
• Never use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.
• Use a flare nut wrench when removing a brake tube and use a flare nut torque wrench when installing a brake tube.
• When installing brake tubes and hoses, be sure to check torque.
• Before working, turn igniti on switch OFF and disconnect connec-
tors of ABS actuator and electric unit (control unit) or the battery
cable from the negative terminal.
• Burnish the new braking surfaces after refinishing or replacing drums or rotors, after replacing p ads or linings, or if a soft pedal
occurs at very low mileage. Refer to BR-32, " Brake Burnishing
Procedure " .

BRC-2< SERVICE INFORMATION >
[ABS]
PRECAUTIONS
SERVICE INFORMATION
PRECAUTIONS
Precaution for Supplemental Restraint Syst em (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000004784402
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 incorrect 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.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precaution for Brake System INFOID:0000000004307251
CAUTION:
• Refer to MA-14 for recommended brake fluid.
• Never reuse drained brake fluid.
• Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is
splashed on painted areas, wash it away with water immediately.
• To clean or wash all parts of master cylin der and disc brake caliper, use clean brake fluid.
• Never use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic sys-
tem.
• Use flare nut wrench when re moving and installing brake
tube.
• If a brake fluid leak is found, the part must be disassembled
without fail. Then it has to be replaced with a new one if a
defect exists.
• Turn the ignition switch OFF an d remove the connector of the
ABS actuator and electric unit (c ontrol unit) or the battery ter-
minal before performing the work.
• Always torque brake lines when installing.
• Burnish the brake contact surf aces after refinishing or replac-
ing rotors, after replacing pads, or if a soft pedal occurs at
very low mileage. Refer to BR-32, " Brake Burnishing Proce-
dure " .
WARNING:
• Clean brake pads and shoes with a waste cloth, then wipe with a dust collector. SBR686C

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Precaution for Brake Control
INFOID:0000000004307252
• During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is normal.
• Just after starting the vehicle, the brake pedal may vibrate or motor operating noises may be heard from
engine compartment. This is normal due to the self check operation.
• Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel, or
snow-covered (fresh, deep snow) roads.
• When an error is indicated by ABS or another warning lamp, collect all necessary information from customer
(what symptoms are present under what conditions) and check for simple causes before starting diagnosis.
Besides electrical system inspection, check brake booster operation, brake fluid level, and fluid leaks.
• If incorrect tire sizes or types are installed on the vehicle or brake pads are not Genuine NISSAN parts, stop-
ping distance or steering stability may deteriorate.
• If there is a radio, antenna or related wiring near t he control module, ABS function may have a malfunction
or error.
• If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness pinches, open circuits or improper wiring.
Precaution for CAN System INFOID:0000000004307253
• Do not apply voltage of 7.0V or higher to terminal to be measured.
• Maximum open terminal voltage of tester in use must be less than 7.0V.
• Before checking harnesses, turn ignition switch OFF and disconnect battery negative cable.
• Area to be repaired must be soldered and wrapped with tape. Make sure that fraying of twisted wire is within 110 mm (4.33 in).
• Do not make a bypass connection to repaired area. (If the circuit is bypassed, characteristics of twisted wire will be lost.)

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• If ABS actuator and electric unit (control unit) connec
tion is loose, tighten the piping to the specified
torque and recheck for leaks.
• If there is damage to the connection flare nut or A BS actuator and electric unit (control unit) threads,
replace the damaged part and recheck for leaks.
• When there is fluid leaking or seeping from a fluid connection, use a clean cloth to wipe off the fluid and recheck for leaks. If fluid is still seeping out, repl ace the damaged part. If the fluid is leaking at the ABS
actuator and electric unit (control unit), replace the ABS actuator and electric unit (control unit) assem-
bly.
CAUTION:
The ABS actuator and electric unit (control un it) cannot be disassembled and must be replaced
as an assembly.
3. Check the brake pads for excessive wear.
POWER SYSTEM TERMINAL LOOSENESS AND BATTERY INSPECTION Make sure the battery positive cable, negative cabl e and ground connection are not loose. In addition, make
sure the battery is sufficiently charged.
ABS WARNING LAMP INSPECTION 1. Make sure ABS warning lamp turns on for approximately 2 seconds when the ignition switch is turned ON. If it does not, check CAN communications. If ther e are no errors with the CAN communication system,
replace the combination meter. Refer to IP-12, " Removal and Installation " .
2. Make sure the lamp turns off approximately 2 seconds after the ignition switch is turned ON. If the lamp does not turn off, conduct self-diagnosis of ABS act uator and electric unit (control unit). If no malfunctions
are detected in self-diagnosis, replace combination meter. Refer to IP-12, " Removal and Installation " .
3. After conducting the self-diagnosis, be sure to erase the error memory. Refer to BRC-18, " CONSULT-III
Function (ABS) " .
Warning Lamp and Indicator Timing INFOID:0000000004307267
Note 1: Brake warning lamp will turn on when the parking brake is applied or when the brake fluid level is low.
x: ON
–: OFF
Control Unit Input/Out put Signal Standard INFOID:0000000004307268
REFERENCE VALUE FROM CONSULT-III CAUTION:
The display shows the control unit calculation data, so a normal value might be displayed even in the
event the output circuit (harness) is open or short circuited.
Condition
ABS
warning lamp BRAKE
warning lamp [Note 1] Remarks
When the ignition switch is OFF – – –
After the ignition switch is turned ON for approx. 1
second × ×
–
After the ignition switch is turned ON for approx. 2
seconds – –Lamp goes off approx. 2 seconds after the
engine is started.
ABS malfunction ×– –
EBD malfunction × ×–

Wheel Sensor
System "
Vehicle running (Note 1)
Almost in accor-
dance with speed-
ometer display
(within ±10%)
BATTERY VOLT Battery voltage sup-
plied to ABS actuator
and electric unit (con-
trol unit) Ignition switch ON 10 to 16V
BRC-27, " ABS Control
Unit Power and Ground
Systems Inspection "
STOP LAMP SW
Stop lamp switch oper-
ation Brake pedal depressed ON
—
Brake pedal not depressed OFF
ABS WARN LAMP ABS warning lamp ON
condition (Note 2) ABS warning lamp ON ON
BRC-16, " Basic Inspec-
tion "
ABS warning lamp OFF OFF
MOTOR RELAY Operation status of mo-
tor and motor relay Ignition switch ON or running
(ABS not activated) OFF
BRC-26, " Actuator Motor,
Motor Relay, and Circuit
Inspection "Ignition switch ON or engine
running (ABS activated) ON
ACTUATOR RLY Actuator relay opera-
tion status Vehicle stopped (Ignition
switch ON) OFF
BRC-26, " Actuator Motor,
Motor Relay, and Circuit
Inspection "Vehicle stopped (Engine run-
ning) ON
FR LH IN SOL
FR LH OUT SOL
FR RH IN SOL
FR RH OUT SOL
RR RH IN SOL
RR RH OUT SOL
RR LH IN SOL
RR LH OUT SOL Solenoid valve opera-
tion Actuator (solenoid) is active
(“ACTIVE TEST” with CON-
SULT-III) or actuator relay is in-
active (in fail-safe mode). ON
BRC-25, " Solenoid Valve
System Inspection "
When actuator (solenoid) is not
active and actuator relay is ac-
tive (ignition switch ON). OFF
ABS SIGNAL
EBD SIGNAL Signal statusABS active
EBD active ON
ABS system
EBD system
ABS not active
EBD not active OFF
ABS FAIL SIG
EBD FAIL SIG Fail signal statusABS fail
EBD fail ON
ABS system
EBD system
ABS normal
EBD normal OFFABS diagnostic mo
de Description
SELF-DIAG RESULTS Displays ABS actuator and electric unit (control unit) self-diagnosis results.
DATA MONITOR Displays ABS actuator and electric unit (control unit) input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read. ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.