2009 NISSAN LATIO Service Repair Manual

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Page 2433 of 4331

NISSAN LATIO 2009 Service Repair Manual ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-1077
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
<Driving Pattern A>
• The A counter will be cleared when the malfunc tion is detected rega

Page 2434 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-1078< SERVICE INFOMATION >
[MR TYPE 2]
BASIC SERVICE PROCEDURE
BASIC SERVICE PROCEDURE
Basic Inspection INFOID:00000000044999291.
INSPECTION START
1. Check service records for any recent repairs th

Page 2435 of 4331

NISSAN LATIO 2009 Service Repair Manual BASIC SERVICE PROCEDURE
EC-1079
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
2. Rev engine (2,000 to 3,000 rpm) two or three times under no
load, then run engine at id

BASIC SERVICE PROCEDURE
EC-1079
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
2. Rev engine (2,000 to 3,000 rpm) two or three times under no
load, then run engine at idle speed for about 1 minute.
3. Read idle speed in “DATA MONITOR” mode with CONSULT-III.
Refer to EC-1082, " Idle Speed and Ignition Timing Check " .
Without CONSULT-III
1. Run engine at about 2,000 rpm for about 2 minutes under no load.
2. Rev engine (2,000 to 3,000 rpm) two or three times under no load, then run engine at idle speed for about
1 minute.
3. Check idle speed. Refer to EC-1082, " Idle Speed and Ignition Timing Check " .
OK or NG OK >> GO TO 10.
NG >> GO TO 4. 4.
PERFORM ACCELERATOR PEDAL RE LEASED POSITION LEARNING
1. Stop engine.
2. Perform EC-1084, " Accelerator Pedal Released Position Learning " .
>> GO TO 5. 5.
PERFORM THROTTLE VALVE CL OSED POSITION LEARNING
Perform EC-1084, " Throttle Valve Closed Position Learning " .
>> GO TO 6. 6.
PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-1084, " Idle Air Volume Learning " .
Is Idle Air Volume Learning carried out successfully?
Yes or No Yes >> GO TO 7.
No >> 1. Follow the instruction of Idle Air Volume Learning. 2. GO TO 4. 7.
CHECK TARGET IDLE SPEED AGAIN
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with CONSULT-III. Refer to EC-1082, " Idle Speed and Igni-
tion Timing Check " .
Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed. Refer to EC-1082, " Idle Speed and Ignition Timing Check " .
M/T: 700
± 50 rpm (in Neutral position)
A/T: 700 ± 50 rpm (in P or N position)
CVT: 700 ± 50 rpm (in P or N position) SEF978U
M/T: 700
± 50 rpm (in Neutral position)
A/T: 700 ± 50 rpm (in P or N position)
CVT: 700 ± 50 rpm (in P or N position) M/T: 700
± 50 rpm (in Neutral position)
A/T: 700 ± 50 rpm (in P or N position)
CVT: 700 ± 50 rpm (in P or N position)

Page 2436 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-1080< SERVICE INFOMATION >
[MR TYPE 2]
BASIC SERVICE PROCEDURE
OK or NG OK >> GO TO 10.
NG >> GO TO 8. 8.
DETECT MALFUNCTIONING PART
Check the following.
• Check crankshaft position sensor (POS)

Page 2437 of 4331

NISSAN LATIO 2009 Service Repair Manual BASIC SERVICE PROCEDURE
EC-1081
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
Yes >> GO TO 14.
No >> 1. Follow the instruction of Idle Air Volume Learning. 2. GO TO 4. 14.
CHECK T

Page 2438 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-1082< SERVICE INFOMATION >
[MR TYPE 2]
BASIC SERVICE PROCEDURE
1. Substitute another known-good ECM to check ECM f unction. (ECM may be the cause of an incident, but
this is a rare case.)
2. Perfor

Page 2439 of 4331

NISSAN LATIO 2009 Service Repair Manual BASIC SERVICE PROCEDURE
EC-1083
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
• : Vehicle front
2. Connect No. 4 ignition coil (1) and No. 4 spark plug with suitable

Page 2440 of 4331

NISSAN LATIO 2009 Service Repair Manual Idle Air Volume Learning " .
VIN Registration INFOID:0000000004499932
DESCRIPTION
VIN Registration is an operation to registering VIN in ECM. It must be performed each time ECM is replaced.
NOTE:
Acc

Idle Air Volume Learning " .
VIN Registration INFOID:0000000004499932
DESCRIPTION
VIN Registration is an operation to registering VIN in ECM. It must be performed each time ECM is replaced.
NOTE:
Accurate VIN which is registered in ECM ma y be required for Inspection & Maintenance (I/M).
OPERATION PROCEDURE
With CONSULT-III
1. Check the VIN of the vehicle and note it. Refer to GI-43, " Model Variation " .
2. Turn ignition switch ON and engine stopped.
3. Select “VIN REGISTRATION ” in “WORK SUPPORT” mode.
4. Follow the instruction of CONSULT-III display.
Accelerator Pedal Released Position Learning INFOID:0000000004499933
DESCRIPTION
Accelerator Pedal Released Position Learning is an operati on to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal positi on sensor output signal. It must be performed each time
harness connector of accelerator pedal pos ition sensor or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON and wait at least 2 seconds.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF and wait at least 10 seconds.
Throttle Valve Clos ed Position Learning INFOID:0000000004499934
DESCRIPTION
Throttle Valve Closed Position Learning is an operation to l earn the fully closed position of the throttle valve by
monitoring the throttle position sensor output signal . It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds. Make sure that throttle valve moves during above 10 seconds by confirming the operating sound.
Idle Air Volume Learning INFOID:0000000004499935
DESCRIPTION
Idle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specific
range. It must be performed under any of the following conditions:
• Each time electric throttle control actuator or ECM is replaced.
• Idle speed or ignition timing is out of specification.
PREPARATION
Before performing Idle Air Volume Learning, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the follo wing conditions are missed for even a moment.
• Battery voltage: More than 12.9V (At idle)
• Engine coolant temperature: 70 - 95 °C (158 - 203 °F)
• Park/neutral position (PNP) switch: ON
• Electric load switch: OFF

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