NISSAN LATIO 2009 Service Repair Manual

115, " Trouble Diagnosis Procedure " .
• Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following “symptoms” are detected, check systems shown in the “Diagnoses/service procedure” col- umn in this order.
Conditions of Vehicle (Operating Conditions)
• Intelligent Key is registered.
• Key is not inserted in ignition switch.
• One or more registered Intelligent Keys are in the vehicle.
KEY WARNING LAMP (RED) ILLUMINATES
NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to BL-115, " Trouble Diagnosis Procedure " .
• Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following “symptoms” are detected, check systems shown in the “Diagnoses/service procedure” col- umn in this order.
Conditions of Vehicle (Operating Conditions)
• Intelligent Key is registered.
• Key is not inserted in ignition switch.
• One or more registered Intelligent Keys are in the vehicle.
KEY WARNING LAMP DOES NOT ILLUMINATE
NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to BL-115, " Trouble Diagnosis Procedure " .
• Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following “symptoms” are detected, check systems shown in the “Diagnoses/service procedure” col- umn in this order.
• Check if ignition switch turns using mechanical key. If it turns, check if “ENGINE START BY I-KEY” in
“WORK SUPPORT” mode is ON.
Conditions of Vehicle (Operating Conditions)
• Intelligent Key is registered.
• Mechanical key is out of ignition switch.
• One or more registered Intelligent Keys are in the vehicle. Symptom Diagnosis/service procedure Reference page
Ignition switch does not turn on with Intelligent Key.
[KEY warning lamp (g reen) illuminates]. 1. Check steering lock solenoid.
BL-147 2. Replace Intelligent Key unit.
BL-158Symptom Diagnosis/service procedure Reference page
Ignition switch does not turn on with Intelligent Key.
[KEY warning lamp (re d) illuminates]. 1. Check inside key antenna.
BL-146 2. Replace Intelligent Key unit.
BL-158Symptom Diagnosis/service procedure Reference page
Ignition switch does not turn on with Intelligent Key.
[GREEN key warning lamp does not illuminate]. 1. Check Intelligent Key unit power supply and ground cir-
cuit. BL-126 2. Check ignition knob switch.
BL-129 3. Check key switch.
BL-127 4. Check "KEY" warn
ing lamp (GREEN). BL-155 5. Replace Intelligent Key unit.
BL-158

BL
N
O P
NON-DTC ITEM
NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to BL-115, " Trouble Diagnosis Procedure " .
• Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following “symptoms” are detected, check syst ems shown in the “Diagnoses/service procedure” col-
umn in this order.
Conditions of Vehicle (Operating Conditions) • Intelligent Key is registered.
• Multiple mechanical keys are not set in a keyfob. (If mechanical keys are near the ignition switch, the operation may not work properly.)
ENGINE START CONDITION CHECK NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to BL-115, " Trouble Diagnosis Procedure " .
• If the following “symptoms” are detected, check syst ems shown in the ”Diagnoses/service procedure” col-
umn in this order.
ALL FUNCTIONS OF INTELLIGENT KEY SYSTEM DO NOT OPERATE
NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to BL-115, " Trouble Diagnosis Procedure " .
• Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following “symptoms” are detected, check syst ems shown in the “Diagnosis/service procedure” column
in this order.
Conditions of Vehicle (Operating Conditions) • “ENGINE START BY I-KEY” and “LOCK/UNLOCK BY I-KEY” are ON when setting on CONSULT-III.
• Mechanical key is out of ignition switch.
• Ignition switch is not depressed.
• All doors are closed.
• Intelligent key is registered. RED key warning lamp does not illuminate
[Without Intelligent Key]. 1. Check "KEY" warning lamp (RED).
BL-155 2. Replace Intelligent Key unit.
BL-158Symptom Diagnosis/service procedure Reference page
Symptom Diagnosis/service procedure Reference page
Non DTC Item 1. Check key switch.
BL-1272. Check NATS antenna amp.
BL-248Symptom Diagnosis/service procedure Reference page
Engine start condition check 1. Check CVT or A/T device (park position switch).
(with CVT or A/T) BL-153 2. Check key interlock solenoid (with M/T).
BL-1493. Check stop lamp switch (with CVT or A/T).
BL-1504. Check stop lamp switch (with M/T).
BL-152

115, " Trouble Diagnosis Procedure " .
• Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following “symptoms” are detected, check system s shown in the “Diagnosis/procedure” column in this
order.
Conditions of Vehicle (Operating Conditions)
• “LOCK/UNLOCK BY I-KEY” is ON when setting on CONSULT-III.
• Mechanical key is out of ignition switch.
• Ignition switch is not depressed.
• All doors are closed.
• Intelligent Key is registered.
REMOTE KEYLESS ENTRY FUNCTION MALFUNCTION
Symptom Diagnosis/service procedure Reference page
All function of Intelligent Key system dose not
operate. 1. Check Intelligent Key unit power supply and ground
circuit. BL-126 2. Check Intelligent Key battery inspection.
BL-158 3. Replace Intelligent Key unit.
BL-158Symptom Diagnosis/service procedure Reference page
Door lock/unlock does not operate by all request
switches. 1. Check door switch (hatchback).
BL-131 2. Check door switch (sedan).
BL-134 3. Check key switch.
BL-127 4. Check ignition knob switch.
BL-129 5. Replace Intelligent Key unit.
BL-158Door lock/unlock does not operate by request
switch (driver side). 1. Check door request switch (driver side).
BL-135 2. Check outside key antenna (driver side).
BL-143 3. Replace Intelligent Key unit.
BL-158Door lock/unlock does not operate by request
switch (passenger side). 1. Check door request switch (passenger side).
BL-135 2. Check outside key antenna (passenger side).
BL-143 3. Replace Intelligent Key unit.
BL-158Door lock/unlock does not operate by back door
request switch (hatchback). 1. Check back door request switch.
BL-137 2. Check outside key antenna (rear bumper).
BL-144 3. Replace Intelligent Key unit.
BL-158Door lock/unlock does not operate by trunk
opener request switch (sedan). 1. Check trunk opener request switch.
BL-138 2. Check outside key antenna (rear bumper).
BL-144 3. Replace Intelligent Key unit.
BL-158Auto lock function does not operate.
1. Check “AUTO RELOCK TI
MER” setting in “WORK
SUPPORT”. BL-117 2. Replace Intelligent Key unit.
BL-158Key reminder function does not operate.
1. Check door switch (hatchback).
BL-131 2. Check door switch (sedan).
BL-134 3. Check inside key antenna.
BL-146 4. Check unlock sensor.
BL-140 5. Check Intelligent Key battery.
BL-158 6. Replace Intelligent Key unit.
BL-158

BL
N
O P
NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to BL-115, " Trouble Diagnosis Procedure " .
• Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following “symptoms” are detected, check syst ems shown in the “Diagnosis/service procedure” column
in this order.
Conditions of Vehicle (Operating Conditions) • Ignition switch is not depressed.
• All doors are closed.
HAZARD AND BUZZER REMINDER FUNCTION MALFUNCTION NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to BL-115, " Trouble Diagnosis Procedure " .
• Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following “symptoms” are detected, check syst ems shown in the “Diagnosis/service procedure” column
in this order.
Conditions of Vehicle (Operating Conditions) • Ignition switch is not depressed.
• All doors are closed. Symptom Diagnosis/service procedure
Reference
page
All of the remote keyless entry functions do
not operate. 1. Check Intelligent Key unit power supply and ground circuit.
BL-1262. Check key switch (BCM input).
BL-1283. Check Intelligent Key battery.
BL-1584. Remote Keyless Entry function inspection.
BL-1585. Replace Intelligent Key unit.
BL-158Auto lock function does not operate.
1. Check “AUTO RELOCK TIMER”
setting in “WORK SUPPORT”. BL-117 2. Replace Intelligent Key unit.
BL-158Key reminder function does not operate.
1. Check door switch (hatchback).
BL-1312. Check door switch (sedan).
BL-1343. Check inside key antenna.
BL-1464. Check unlock sensor.
BL-1405. Check Intelligent Key battery.
BL-1586. Replace Intelligent Key unit.
BL-158Panic alarm function does not operate.
1. Check “PANIC ALARM DELAY” setting in “WORK SUPPORT”.
BL-1172. Check Intelligent Key battery inspection.
BL-1583. Check horn function.
BL-1574. Check headlamp function.
BL-1575. Check key switch.
BL-1276. Check ignition knob switch.
BL-1297. Replace Intelligent Key unit.
BL-158Symptom Diagnosis/service procedure Reference page
Hazard reminder does not operate by request
switch.
(Buzzer reminder operate). 1. Check “HAZARD ANSWER BACK” setting in “WORK
SUPPORT”. BL-1172. Check hazard function with hazard switch.
BL-1563. Replace Intelligent Key unit.
BL-158

115, " Trouble Diagnosis Procedure " .
• Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following “symptoms” are detected, check syst ems shown in the “Diagnosis/service procedure” column
in this order.
Conditions of Vehicle (Operating Conditions)
Warning chime/buzzer functions operating condition is ex tremely complicated, during operating confirmations,
reconfirm the list above twice in order to ensure proper operation. Buzzer reminder does
not operate by request
switch.
(Hazard reminder oper-
ates). Intelligent Key
warning buzzer
does not operate. 1. Check “ANSER BACK WITH I-KEY LOCK” or “ANSER
BACK WITH I-KEY UNLOCK” setting in “WORK SUP-
PORT”. BL-1172. Check Intelligent Key warning buzzer(s).
BL-1423. Replace Intelligent Key unit.
BL-158Hazard reminder does not operate by Intelli-
gent Key (door lock/unlock button).
(Buzzer reminder operates properly). 1. Check “HAZARD ANSWER BACK” setting in “WORK
SUPPORT”. BL-1172. Check hazard function with hazard switch.
BL-1563. Replace Intelligent Key.
BL-158Buzzer reminder does
not operate by Intelligent
Key (door lock/unlock
button).
(Hazard reminder oper-
ates). Intelligent Key
warning buzzer
does not operate. 1. Check “HORN WITH KEYLESS LOCK” setting in “WORK
SUPPORT”. BL-1172. Check Intelligent Key warning buzzer(s).
BL-1423. Replace Intelligent Key unit.
BL-158Symptom Diagnosis/service procedure Reference page
Symptom Diagnosis/service procedure Reference page
Ignition switch warning chime does not oper-
ate. 1. Check ignition knob switch.
BL-1292. Check door switch (hatchback).
BL-1313. Check door switch (sedan).
BL-1344. Check key switch.
BL-1275. Check Intelligent Key warning chime.
BL-1566. Replace Intelligent Key unit.
BL-158Ignition key warning chime does not operate.
(When mechanical key used). 1. Check key switch (Intelligent Key unit input).
BL-1272. Check key switch (BCM input).
BL-1283. Check door switch (hatchback).
BL-1314. Check door switch (sedan).
BL-1345. Check Intelligent Key warning chime.
BL-1566. Replace Intelligent Key unit.
BL-158OFF position warning chime (For internal)
does not operate. 1. Check ignition switch position.
BL-1502. Check ignition knob switch.
BL-1293. Check key switch.
BL-1274. Check combination meter warning chime.
BL-1565. Replace Intelligent Key unit.
BL-158

BL
N
O P
WARNING LAMP FUNCTION MALFUNCTION
NOTE:
• Before performing the diagnosis in the following table, check “Trouble Diagnosis Procedure”. Refer to BL-115, " Trouble Diagnosis Procedure " .
• If the following “symptoms” are detected, check syst ems shown in the “Diagnosis/service procedure” column
in this order.
OFF position warning
chime/buzzer (for ex-
ternal) does not oper-
ate. Both Intelligent Key
warning chime and
buzzer do not oper-
ate. 1. Check ignition switch position.
BL-1502. Check ignition knob switch.
BL-1293. Check key switch.
BL-1274. Check Intelligent Key warning chime.
BL-1565. Check Intelligent Ke
y warning buzzer(s). BL-142 6. Replace Intelligent Key unit.
BL-158Intelligent Key warn-
ing buzzer does not
operate. Check Intelligent Key warning buzzer(s).
BL-142Take away warning
chime/buzzer (door
open to close) does
not operate. Both Intelligent Key
warning chime and
buzzer do not oper-
ate. 1. Check door switch (hatchback).
BL-1312. Check door switch (sedan).
BL-1343. Check inside key antenna.
BL-1464. Check key switch.
BL-1275. Check Intelligent Key warning chime.
BL-1426. Check Intelligent Ke
y warning buzzer(s). BL-142 7. Replace Intelligent Key unit.
BL-158Intelligent Key warn-
ing buzzer does not
operate. Check Intelligent Key warning buzzer(s).
BL-142Take away warning chime (through window)
does not operate. 1.
Check “TAKE OUT FROM WINDOW WARN” setting in
“WORK SUPPORT”. BL-1172. Check inside key antenna.
BL-1463. Check key switch.
BL-1274. Check Intelligent Key battery.
BL-1585. Check Intelligent Key warning chime.
BL-1566. Replace Intelligent Key unit.
BL-158Door lock operation warning buzzer does not
operate. 1. Check door switch (hatchback).
BL-1312. Check door switch (sedan).
BL-1343. Check ignition knob switch.
BL-1294. Check door request switch.
BL-1355. Check back door request switch (hatchback).
BL-1376. Check trunk opener request switch (sedan).
BL-1387. Check outside key antenna (driver side and passenger side).
BL-1438. Check outside key antenna (rear bumper).
BL-1449. Check inside key antenna.
BL-14610. Check Intelligent Key warning buzzer(s).
BL-14211. Replace Intelligent Key unit.
BL-158One warning buzzer does not operate (se-
dan). Check Intelligent Key warning buzzer(s).
BL-142Symptom Diagnosis/service procedure Reference page

NO DTC IS DETECT
ED>> Inspection End.
CAN COMM [U1000]>> After printing “SELF-DIAGNOSI S RESULTS”, go to “CAN SYSTEM”. Refer to LAN-17, " Trouble Diagnosis Flow Chart " .
CAN COMM2 [U1010] >> Replace Intelligent Key unit. Refer to BL-158, " Removal and Installation of Intelli-
gent Key Unit " .
Power Supply and Ground Circuit Inspection INFOID:00000000043050462. Check Intelligent Key battery.
BL-158 3. Check KEY warning lamp (green).
BL-155 4. Replace Intelligent Key unit.
BL-158P position warning lamp does not illuminate properly.
(With CVT or A/T) 1. Check CVT or A/T device (park position switch).
BL-153 2. Check “P-SHIFT” warning lamp (red).
BL-154 3. Replace Intelligent Key unit.
BL-158LOCK warning lamp does not illuminate properly.
(With M/T) 1. Check key interlock solenoid.
BL-149 2. Check "LOCK" warning lamp.
BL-155 3. Replace Intelligent Key unit.
BL-158Take away warning lamp does not illuminate properly.
(Take away warning chime is operated). 1. Check KEY warning lamp (red).
BL-158 2. Replace Intelligent Key unit.
BL-158Ignition switch warning lamp does not illuminate properly.
(Ignition switch warning chime is operated). 1. Check KEY warning lamp (red).
BL-155 2. Replace Intelligent Key unit.
BL-158CONSULT-III display item DTC code
NO DTC IS DETECTED — CAN COMM U1000
CAN COMM2 U1010

BL
N
O P
OK or NG OK >> GO TO 2
NG >> Repair or replace Intelligent Key power supply circuit. OK >> Power supply and ground circuits are OK.
NG >> Repair or replace the Intelligent Key unit ground circuit.
Key Switch (Intelligent Key Unit Input) Check INFOID:0000000004305047OK >> Key switch circuit is OK.
NG >> GO TO 2 Terminals
Condition of key switch Voltage (V)
(Approx.)
(+)
(–)
Intelligent Key
unit connector Terminal
M52 7 Ground Insert mechanical key
into ignition switch Battery voltage
Remove mechanical
key from ignition switch 0

OK >> GO TO 3
NG >> Repair or replace key switch and ignition knob switch power supply circuit. OK >> GO TO 4
NG >> Replace key cylinder assembly (built-in key switch). OK >> Check the condition of harness and harness connector.
NG >> Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.
Key Switch (BCM Input) Check INFOID:0000000004305048

INTELLIGENT KEY SYSTEM
BL-129
< SERVICE INFORMATION >
C
D E
F
G H
J
K L
M A
B BL
N
O P
1. Remove mechanical key from ignition switch.
2. Disconnect key switch and i gnition knob switch connector.
3. Check voltage between key switch and ignition knob switch and
ground.
OK or NG OK >> GO TO 2
NG >> Check harness between key switch and ignition knob switch and fuse. 2.
CHECK KEY SWITCH OPERATION
Check continuity of key switch and ignition knob switch.
OK or NG OK >> GO TO 3
NG >> Replace key cylinder assembly (built-in key switch). 3.
CHECK KEY SWITCH CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM connector (A) M18 terminal 37 and key switch and ignition knob switch
connector (B) terminal 1.
3. Check continuity between BCM connector (A) M18 terminal 37 and ground.
OK or NG OK >> Key switch (BCM input) circuit is OK.
NG >> Repair or replace harness between key switch and ignition knob switch and BCM.
Ignition Knob Switch Check INFOID:00000000043050491.
CHECK IGNITION KNOB SWITCH INPUT SIGNAL
With CONSULT-III Terminals
Voltage (V)(Approx.)
(+)
(–)
Key switch and ig-
nition knob switch
connector Terminal
M73 2 Ground Battery voltage PIIB6598E
Terminal
Condition of key switch Continuity
Key switch and ignition knob switch
1 2 Insert mechanical key into
ignition switch Yes
Remove mechanical key from ignition switch No PIIB6599E
A B
Continuity
BCM connector Terminal Key switch and ig-
nition knob switch connector Terminal
M18 37 M73 1 Yes
A GroundContinuity
BCM connector Terminal
M18 37 No PIIB6601E