2008 NISSAN LATIO display

DTC P0507 ISC SYSTEM
EC-395
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
DTC P0507 ISC SYSTEM
DescriptionINFOID:0000000001702909
NOTE:
If DTC P0507 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.
The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let
into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine idling speed. The ECM calculates the actual engine speed
from signals of camshaft position sensor (POS) and camshaft position sensor (PHASE).
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value
memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan
operation, etc.).
On Board Diagnosis LogicINFOID:0000000001702910
DTC Confirmation ProcedureINFOID:0000000001702911
NOTE:
• If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
•If the target idle speed is out of the specified value, perform EC-76, "
Idle Air Volume Learning",
before conducting DTC Confirmation Procedure. For the target idle speed, refer to the EC-548
.
TESTING CONDITION:
•Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
•Always perform the test at a temperature above −10°C (14°F).
WITH CONSULT-II
1. Open engine hood.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON again and select “DATA MONITOR”
mode with CONSULT-II.
5. Start engine and run it for at least 1 minute at idle speed.
6. If 1st trip DTC is detected, go to EC-395, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnosis ProcedureINFOID:0000000001702912
1.CHECK PCV HOSE CONNECTION
Confirm that PCV hose is connected correctly.
OK or NG
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0507
0507Idle speed control sys-
tem RPM higher than
expectedThe idle speed is more than the target idle
speed by 200 rpm or more.• Electric throttle control actuator
• Intake air leak
• PCV system
SEF174Y

EC-398
< SERVICE INFORMATION >
DTC P0605 ECM
Follow the procedure “With CONSULT-II” above.
PROCEDURE FOR MALFUNCTION B
With CONSULT-II
1. Turn ignition switch ON and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Turn ignition switch OFF, wait at least 10 seconds and then turn
ON.
4. If 1st trip DTC is detected, go to EC-398, "
Diagnosis Procedure".
With GST
Follow the procedure “With CONSULT-II” above.
PROCEDURE FOR MALFUNCTION C
With CONSULT-II
1. Turn ignition switch ON and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Turn ignition switch OFF, wait at least 10 seconds and then turn
ON.
4. Repeat step 3 for 32 times.
5. If 1st trip DTC is detected, go to EC-398, "
Diagnosis Procedure".
With GST
Follow the procedure “With CONSULT-II” above.
Diagnosis ProcedureINFOID:0000000001702916
1.INSPECTION START
With CONSULT-II
1. Turn ignition switch ON.
2. Select “SELF DIAG RESULTS” mode with CONSULT-II.
3. Touch “ERASE”.
4.Perform DTC Confirmation Procedure.
See EC-397, "
DTC Confirmation Procedure".
5. Is the 1st trip DTC P0605 displayed again?
With GST
1. Turn ignition switch ON.
2. Select Service $04 with GST.
3.Perform DTC Confirmation Procedure.
See EC-397, "
DTC Confirmation Procedure".
4. Is the 1st trip DTC P0605 displayed again?
Ye s o r N o
Ye s > > G O T O 2 .
No >>INSPECTION END
SEF058Y
SEF058Y

DTC P1148 CLOSED LOOP CONTROL
EC-411
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
DTC P1148 CLOSED LOOP CONTROL
On Board Diagnosis LogicINFOID:0000000001702928
This self-diagnosis has the one trip detection logic.
NOTE:
DTC P1148 is displayed with another DTC for air fuel ratio (A/F) sensor 1.
Perform the trouble diagnosis for the corresponding DTC.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1148
11 4 8Closed loop control
functionThe closed loop control function does not oper-
ate even when vehicle is driving in the specified
condition.• Harness or connectors
[Air fuel ratio (A/F) sensor 1 circuit is open
or shorted.]
• Air fuel ratio (A/F) sensor 1
• Air fuel ratio (A/F) sensor 1 heater

EC-412
< SERVICE INFORMATION >
DTC P1217 ENGINE OVER TEMPERATURE
DTC P1217 ENGINE OVER TEMPERATURE
System DescriptionINFOID:0000000001702929
SYSTEM DESCRIPTION
NOTE:
•If DTC P1217 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-143
.
•If DTC P1217 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer
to EC-145
.
Cooling Fan Control
*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to ECM through CAN communication line.
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF].
Cooling Fan Operation
Models with A/C
Models without A/C
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
1
Cooling fan
controlIPDM E/R
(Cooling fan relays) Battery
Battery voltage*
1
Wheel sensor
Vehicle speed*2
Engine coolant temperature sensor Engine coolant temperature
Air conditioner switch
Air conditioner ON signal*
2
Refrigerant pressure sensor Refrigerant pressure
PBIB2483E
PBIB3335E

EC-430
< SERVICE INFORMATION >
DTC P1421 COLD START CONTROL
DTC P1421 COLD START CONTROL
DescriptionINFOID:0000000001702947
ECM controls ignition timing and engine idle speed when engine is started with prewarming up condition.
This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.
On Board Diagnosis LogicINFOID:0000000001702948
DTC Confirmation ProcedureINFOID:0000000001702949
NOTE:
• If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
•If DTC P1421 is displayed with other DTC, first perform the trouble diagnosis for other DTC.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Select “DATA MONITOR” mode with CONSULT-II.
4. Check that the “COOLAN TEMP/S” indication is between 4°C
(39°F) and 36°C (97°F).
If “COOLAN TEMP/S” indication is within the specified value, go
to the following step.
If “COOLAN TEMP/S” indication is out of the specified value,
cool engine down or warm engine up and go to step 1.
5. Start engine and let it idle for 5 minutes.
6. If 1st trip DTC is detected, go to EC-430, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnosis ProcedureINFOID:0000000001702950
1.PERFORM IDLE AIR VOLUME LEARNING
Perform EC-76, "
Idle Air Volume Learning".
Is Idle Air Volume Learning carried out successfully?
Ye s o r N o
Ye s > > G O T O 2 .
No >> Follow the instruction of Idle Air Volume Learning.
2.CHECK INTAKE SYSTEM
Check for the cause of intake air volume lacking. Refer to the following.
• Crushed intake air passage
• Intake air passage clogging
OK or NG
OK >> GO TO 3.
NG >> Repair or replace malfunctioning part
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1421
1421Cold start emission reduction
strategy monitoringECM does not control ignition timing and engine
idle speed properly when engine is started with
prewarming up condition.• Lack of intake air volume
• Fuel injection system
•ECM
SEF174Y

DTC P1421 COLD START CONTROL
EC-431
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
3.CHECK FUEL INJECTION SYSTEM FUNCTION
Perform EC-257, "
DTC Confirmation Procedure" for DTC P0171.
OK or NG
OK >> GO TO 4.
NG >> Go to EC-260, "
Diagnosis Procedure" for DTC P0171.
4.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-II
1. Turn ignition switch ON.
2. Select “SELF DIAG RESULTS” mode with CONSULT-II.
3. Touch “ERASE”.
4.Perform DTC Confirmation Procedure.
See EC-430, "
DTC Confirmation Procedure".
5. Is the 1st trip DTC P1421 displayed again?
With GST
1. Turn ignition switch ON.
2. Select Service $04 with GST.
3.Perform DTC Confirmation Procedure.
See EC-430, "
DTC Confirmation Procedure".
4. Is the 1st trip DTC P1421 displayed again?
Ye s o r N o
Yes >> GO TO 5.
No >>INSPECTION END
5.REPLACE ECM
1. Replace ECM.
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs.
Refer to BL-211, "
ECM Re-communicating Function".
3. Perform EC-75, "
VIN Registration".
4. Perform EC-76, "
Accelerator Pedal Released Position Learning".
5. Perform EC-76, "
Throttle Valve Closed Position Learning".
6. Perform EC-76, "
Idle Air Volume Learning".
>>INSPECTION END

EC-432
< SERVICE INFORMATION >
DTC P1564 ASCD STEERING SWITCH
DTC P1564 ASCD STEERING SWITCH
Component DescriptionINFOID:0000000001702951
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
Refer to EC-28
for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000001702952
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001702953
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to EC-397
.
1. ASCD steering switch 2. MAIN switch 3. CANCEL switch
4. RESUME/ACCELERATE switch 5. SET/COAST switch
BBIA0707E
MONITOR ITEM CONDITION SPECIFICATION
MAIN SW • Ignition switch: ONMAIN switch: Pressed ON
MAIN switch: Released OFF
CANCEL SW • Ignition switch: ONCANCEL switch: Pressed ON
CANCEL switch: Released OFF
RESUME/ACC SW • Ignition switch: ONRESUME/ACCELERATE switch:
PressedON
RESUME/ACCELERATE switch: Re-
leasedOFF
SET SW • Ignition switch: ONSET/COAST switch: Pressed ON
SET/COAST switch: Released OFF
DTC No.Trouble Diagnosis
NameDTC Detecting Condition Possible Cause
P1564
1564ASCD steering switch• An excessively high voltage signal from the
ASCD steering switch is sent to ECM.
• ECM detects that input signal from the
ASCD steering switch is out of the specified
range.
• ECM detects that the ASCD steering switch
is stuck ON.• Harness or connectors
(ASCD switch circuit is open or shorted.)
•ASCD steering switch
•ECM

EC-438
< SERVICE INFORMATION >
DTC P1572 ASCD BRAKE SWITCH
DTC P1572 ASCD BRAKE SWITCH
Component DescriptionINFOID:0000000001702958
When the brake pedal is depressed, ASCD brake switch (2) is
turned OFF and stop lamp switch (1) is turned ON. ECM detects the
state of the brake pedal by this input of two kinds (ON/OFF signal).
Refer to EC-28
for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000001702959
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001702960
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
•If DTC P1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-397
.
•This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not
stored in ECM memory. And in that case, 1st trip DTC and 1st trip freeze frame data are displayed.
1st trip DTC is erased when ignition switch OFF. And even when malfunction A is detected in two
consecutive trips, DTC is not stored in ECM memory.
BBIA0708E
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW1
(ASCD brake switch)• Ignition switch: ON• Brake pedal: Fully released (A/T, CVT)
• Brake pedal and clutch pedal: Fully re-
leased (M/T)ON
• Brake pedal: Slightly depressed (A/T,
CVT)
• Brake pedal and/or clutch pedal: Slight-
ly depressed (M/T)OFF
BRAKE SW2
(Stop lamp switch)• Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
DTC No.Trouble Diagnosis
NameDTC Detecting Condition Possible Cause
P1572
1572ASCD brake switchA)When the vehicle speed is above 30km/h (19
MPH), ON signals from the stop lamp switch
and the ASCD brake switch are sent to ECM
at the same time.• Harness or connectors
(Stop lamp switch circuit is shorted.)
• Harness or connectors
(ASCD brake switch circuit is shorted.)
• Harness or connectors
(ASCD clutch switch circuit is shorted.)
(M/T)
• Stop lamp switch
• ASCD brake switch
• ASCD clutch switch (M/T)
• Incorrect stop lamp switch installation
• Incorrect ASCD brake switch installation
• Incorrect ASCD clutch switch installation
(M/T)
•ECM B)ASCD brake switch signal is not sent to ECM
for extremely long time while the vehicle is
driving