NISSAN LATIO 2009 Service Repair Manual

BL-140< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM4.
CHECK TRUNK OPENER REQU EST SWITCH GROUND CIRCUIT
Check continuity between trunk opener request switch connector B129 terminal 2 and ground.
OK or NG OK >> GO TO 5
NG >> Repair or replace trunk opener request switch ground
circuit. 5.
CHECK INTELLIGENT KEY UNIT OUTPUT SIGNAL
1. Connect Intelligent Key unit connector.
2. Check voltage between Intelligent Key unit connector M52 terminal 29 and ground.
OK or NG OK >> Check the condition of harness and connector.
NG >> Replace Intelligent Key unit. Refer to BL-158, " Removal
and Installation of Intelligent Key Unit " .
Unlock Sensor Check INFOID:00000000043050551.
CHECK UNLOCK SENSOR INPUT SIGNAL
Check voltage between Intelligent Key unit connector and ground.
OK or NG OK >> Unlock sensor circuit is OK.
NG >> GO TO 2 2.
CHECK UNLOCK SENSOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit and front door lock actuator LH (door unlock sensor) connector.
3. Check continuity between Intelligent Key unit connec tor (A) terminal 28 and front door lock actuator LH
(door unlock sensor) connector (B) terminal 4.
Trunk opener request
switch connector Terminal
GroundContinuity
B129 2 Yes PIIB6337E
Terminals
Voltage (V)(Approx.)
(+)
(–)
Intelligent Key unit
connector Terminal
M52 29 Ground 5 PIIB6617E
Terminals
Front door
lock
(driver side) condition Voltage (V)
(Approx.)
(+)
(–)
Intelligent Key
unit connector Terminal
M52 28 Ground Locked 5
Unlocked 0 PIIB6638E

BL
N
O P
4. Check continuity between Intelligent Key unit connector and
ground.
OK or NG OK >> GO TO 3
NG >> Repair or replace harness between Intelligent Key unit and front door lock actuator LH (door
unlock sensor). OK >> GO TO 4
NG >> Replace unlock sensor. OK >> GO TO 5
NG >> Repair or replace harness.

BL-142< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
OK or NG OK >> Replace front door lock actuator LH (door unlock sen-
sor). Refer to BL-166, " Removal and Installation " .
NG >> Replace Intelligent Key unit. Refer to BL-158, " Removal
and Installation of Intelligent Key Unit " .
Intelligent Key Warning Buzzer(s) Check INFOID:00000000043050561.
CHECK INTELLIGENT KEY WARNING BUZZER POWER SUPPLY CIRCUIT
1. Disconnect inoperative Intelligent Key warning buzzer connector.
2. Check voltage between Intelligent Key warning buzzer connector and ground.
OK or NG OK >> GO TO 2
NG >> Repair or replace Intelligent Key warning buzzer power supply circuit. 2.
CHECK INTELLIGENT KEY WARNING BUZZER CIRCUIT
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit c onnector and inoperative Intelligent Key warning buzzer
connector.
3. Check continuity between Intelligent Key unit connector and ground.
OK or NG OK >> GO TO 3
NG >> Repair or replace harness between Intelligent Key unit and Intelligent Key warning buzzer. 3.
CHECK INTELLIGENT KEY WA RNING BUZZER OPERATION
Connect battery power supply to Intelligent Key warning buzzer terminals 1 and 2, and check the operation. Terminals
Voltage (V)(Approx.)
(+)
(–)
Intelligent Key unit
connector Terminal
M52 28 Ground 5 PIIB6638E
Terminals
Voltage (V)(Approx.)
(+)
(–)
Intelligent Key warning buzzer
connector Terminal
Front door LH D6 1 Ground Battery voltage
Trunk (sedan) B32 PIIB6622E
A B
Continuity
Intelligent
Key unit
connector Terminal
Intelligent Key warning
buzzer connector Terminal
M52 4 Front door LH D6
2 Yes
Trunk (sedan) B32
A GroundContinuity
Intelligent Key unit con-
nector Terminal
M52 4 No PIIB6623E

BL
N
O P
OK or NG OK >> Intelligent Key warning buzzer is OK.
NG >> Replace inoperative Intelligent Key warning buzzer.
Outside Key Antenna (Driver Si de and Passenger Side) Check INFOID:0000000004305057Yes >> Outside key antenna (driver side or passenger side) is OK.
No >> GO TO 2 OK >> Outside key antenna is OK.
NG >> GO TO 3 SIIA1910J

OK >> GO TO 4
NG >> Repair or replace harness between Intelligent Key unit and outside key antenna. OK >> Replace malfunctioning outside key antenna.
NG >> Replace Intelligent Key unit. Refer to BL-158, " Removal and Installation of Intelligent Key Unit " .
Outside Key Antenna (Rear Bumper) Check INFOID:0000000004305058 SIIA1910J

BL
N
O P
Do the hazard lamps flash? Yes >> Rear bumper antenna is OK.
No >> GO TO 2 OK >> Rear bumper antenna is OK.
NG >> GO TO 3 OK >> GO TO 4
NG >> Repair or replace harness between Intelligent Key unit and rear bumper antenna. Terminals
Condition Signal
(Reference value.)
(+)
(–)
Intelligent
Key unit
connector Terminal
M52 17 Ground Back door
request
switch is
pushed SIIA1910J
A B Continuity
Intelligent Key unit
connector Terminal
Rear bumper an-
tenna connector Terminal
M52 17
B2 1
Yes
18 2
A GroundContinuity
Intelligent Key unit
connector Terminal
M52 17
No
18

BL-146< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
OK or NG OK >> Replace rear bumper antenna.
NG >> Replace Intelligent Key unit. Refer to BL-158, " Removal and Installation of Intelligent Key Unit " .
Inside Key Antenna Check INFOID:00000000043050591.
CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Check signal between Intelligent Key unit connector and ground with oscilloscope.
OK or NG OK >> Check the condition of harness and connector.
NG >> GO TO 2 2.
CHECK INSIDE KEY ANTENNA CIRCUIT
1. Disconnect Intelligent Key unit and inside key antenna connector.
2. Check continuity between Intelligent Key unit connector and inside key antenna connector.
3. Check continuity between Intelligent Key unit connector and ground. Terminals
Condition Signal
(Reference value.)
(+)
(–)
Intelligent
Key unit
connector Terminal
M52 17 Ground Back door
request
switch is
pushed PIIB6628E
SIIA1910J
Terminals ConditionSignal
(Reference value.)
(+)
(–)
Intelligent Key unit
connector Ter-
minal
M52 Instrument
panel area 13
Ground Any door
is open →
close
Front con-
sole area 15
Rear floor area 33 WIIA1200E
PIIB5502J
A B Continuity
Intelligent Key
unit connector TerminalInside key antenna con-
nector Terminal
M52 13
M10Instrument
panel 2
Yes
14 1
15 B125Front con-
sole 1
16 2
33 B126 Rear floor 1
34 2 WIIA1254E

INTELLIGENT KEY SYSTEM
BL-147
< SERVICE INFORMATION >
C
D E
F
G H
J
K L
M A
B BL
N
O P
OK or NG OK >> GO TO 3
NG >> Repair or replace harness between Intelligent Key unit and inside key antenna. 3.
CHECK INSIDE KEY ANTENNA INPUT SIGNAL 2
1. Replace inside key antenna. (New antenna or other antenna)
2. Connect Intelligent Key unit and inside key antenna connector.
3. Check signal between Intelligent Key unit connector and ground with oscilloscope.
OK or NG OK >> Replace malfunction inside key antenna.
NG >> Replace Intelligent Key unit.
Steering Lock Solenoid Check INFOID:00000000043050601.
CHECK STEERING LOCK SOLENOID POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect steering lock solenoid connector.
3. Check voltage between steering lock solenoid and ground.
OK or NG OK >> GO TO 2
NG >> Repair or replace steering lock solenoid power supply
circuit. 2.
CHECK STEERING LOCK SOLENOID GROUND CIRCUIT A
GroundContinuity
Intelligent Key unit
connector Terminal
M52 Instrument panel
13
No
14
Front console 15
16
Rear floor 33
34 Terminals
ConditionSignal
(Reference value.)
(+)
(–)
Intelligent Key unit
connector Ter-
minal
M52 Instrument
panel area 13
Ground Any door
is open →
close
Front con-
sole area 15
Rear floor area 33 WIIA1200E
PIIB5502J
Terminals Voltage (V)(Approx.)
(+)
(–)
Steering lock sole-
noid Terminal
M6 1 Ground Battery voltage PIIB6632E

BL-148< SERVICE INFORMATION >
INTELLIGENT KEY SYSTEM
Check continuity between steering lock solenoid and ground.
OK or NG OK >> GO TO 3
NG >> GO TO 6 3.
CHECK INTELLIGENT KEY UNIT OUTPUT SIGNAL
1. Connect steering lock solenoid connector.
2. Check voltage between Intelligent Key unit and ground.
OK or NG OK >> GO TO 4
NG >> GO TO 6 4.
CHECK STEERING LOCK COMMUNICATION SIGNAL
Check signal between Intelligent Key unit and ground with oscilloscope.
OK or NG OK >> GO TO 5
NG >> GO TO 6 5.
CHECK STEERING LOCK SOLENOID COMMUNICA TION CIRCUIT FOR OPEN
1. Disconnect Intelligent Key unit and steering lock solenoid connectors.
2. Check continuity between steering lock solenoid and Intelligent Key unit. Steering lock solenoid connector Terminal
GroundContinuity
M6 4 Yes PIIB6633E
Terminals
Voltage (V)(Approx.)
(+)
(–)
Intelligent Key unit
connector Terminal
M52 1 Ground 5 PIIB6634E
Terminals
Condition of key switch Voltage (V)
(Approx.)
(+)
(–)
Intelligent
Key unit
connector Terminal
M52 32 Ground Ignition
switch is pushed PIIB6635E
SIIA1911J

BL
N
O P
OK or NG OK >> Replace steering lock solenoid.
NG >> Repair or replace harness between steering lock sole-
noid and Intelligent Key unit. OK >> Replace Intelligent Key unit. Refer to
BL-158, " Removal
and Installation of Intelligent Key Unit " .
NG >> Repair or replace harness between steering lock sole- noid and Intelligent Key unit.
Key Interlock Solenoid (With M/T) Check INFOID:0000000004305061OK >> GO TO 2
NG >> Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.