Nissan Juke F15. Manual — part 486
VALVE TIMING OFFSET DATA WRITING
EC-757
< BASIC INSPECTION >
[MR EXCEPT FOR NISMO RS MODELS]
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VALVE TIMING OFFSET DATA WRITING
Description
INFOID:0000000012198267
Valve timing offset data writing is an operation to allow ECM to learn engine valve timing offset data. This oper-
ation must be performed after the following parts are replaced:
• ECM
• Engine assembly
Work Procedure
INFOID:0000000012198268
CAUTION:
• Perform the valve timing offset data clear operation beforehand. Refer to
• If 2D code cannot be read, perform only the valve timing offset data clear operation.
1.
WRITE VALVE TIMING OFFSET DATA
With CONSULT
1. Turn ignition switch ON.
2. Select “VALVE TIMING OFFSET DATA WRITING ” in “WORK SUPPORT” mode of “ENGINE” using CON-
SULT.
3. Observe the instructions displayed on the CONSULT screen to write 2D code affixed to the throttle valve.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON.
6. Check that DTC P100C is not displayed.
>> INSPECTION END
EC-758
< BASIC INSPECTION >
[MR EXCEPT FOR NISMO RS MODELS]
IDLE AIR VOLUME LEARNING
IDLE AIR VOLUME LEARNING
Description
INFOID:0000000012198269
Idle Air Volume Learning is a function of ECM to learn the idle air volume that keeps each engine idle speed
within the specific range. It must be performed under any of the following conditions:
• ECM is replaced.
• Engine assembly is replaced.
• Electric throttle control actuator is replaced or removed.
• Turbocharger assembly is replaced or removed.
• Idle speed or ignition timing is out of specification.
Work Procedure
INFOID:0000000012198270
1.
PRECONDITIONING
Make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.
• Battery voltage: More than 12.5 V (At idle)
• Engine coolant temperature: 70 - 100
°C (158 - 212°F)
• Selector lever: P or N (CVT), Neutral (M/T)
• Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime running light systems, set lighting switch to the 1st position to
light only small lamps.
• Steering wheel: Neutral (Straight-ahead position)
• Vehicle speed: Stopped
• Transmission: Warmed-up
- CVT models
• With CONSULT: Drive vehicle until “ATF TENP SEN” in “DATA MONITOR” mode of “CVT” system indicates
less than 0.9 V.
• Without CONSULT: Drive vehicle for 10 minutes.
- M/T models
• Drive vehicle for 10 minutes.
Do you have CONSULT?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
IDLE AIR VOLUME LEARNING
With CONSULT
1. Perform Accelerator Pedal Released Position Learning. Refer to
.
2. Perform Throttle Valve Closed Position Learning. Refer to
.
3. Start engine and warm it up to normal operating temperature.
4. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode of “ENGINE”.
5. Touch “START” and wait 20 seconds.
Is “CMPLT” displayed on CONSULT screen?
YES
>> GO TO 4.
NO
>> GO TO 5.
3.
IDLE AIR VOLUME LEARNING
Without CONSULT
NOTE:
• It is better to count the time accurately with a clock.
• It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has
a malfunction.
1. Perform Accelerator Pedal Released Position Learning. Refer to
.
2. Perform Throttle Valve Closed Position Learning. Refer to
.
3. Start engine and warm it up to normal operating temperature.
4. Turn ignition switch OFF and wait at least 10 seconds.
IDLE AIR VOLUME LEARNING
EC-759
< BASIC INSPECTION >
[MR EXCEPT FOR NISMO RS MODELS]
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5. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
6. Repeat the following procedure quickly five times within 5 seconds.
-
Fully depress the accelerator pedal.
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Fully release the accelerator pedal.
7. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.
8. Fully release the accelerator pedal within 3 seconds after the MIL turned ON.
9. Start engine and let it idle.
10. Wait 20 seconds.
>> GO TO 4
4.
CHECK IDLE SPEED AND IGNITION TIMING
Rev up the engine two or three times and make sure that idle speed and ignition timing are within the specifi-
cations. For specification, refer to
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following
• Check that throttle valve is fully closed.
• Check PCV valve operation.
• Check that downstream of throttle valve is free from air leakage.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace malfunctioning part.
6.
DETECT MALFUNCTIONING PART
Engine component parts and their installation condition are questionable. Check and eliminate the cause of
the incident.
It is useful to perform “TROUBLE DIAGNOSIS - SPECIFICATION VALUE”. Refer to
If any of the following conditions occur after the engine has started, eliminate the cause of the incident and
perform Idle Air Volume Learning all over again:
• Engine stalls.
• Erroneous idle.
>> INSPECTION END
SEC897C
EC-760
< BASIC INSPECTION >
[MR EXCEPT FOR NISMO RS MODELS]
AIR FUEL RATIO INITIAL LEARNING
AIR FUEL RATIO INITIAL LEARNING
Description
INFOID:0000000012198271
Air fuel ratio initial learning of ECM to learn the air fuel ratio that keeps each engine idle speed within the spe-
cific range. It must be performed under any of the following conditions:
• When ECM is replaced
*
• When engine assembly is replaced
*
• When electric throttle control actuator is replaced
*
• When mass air flow sensor is replaced
• When fuel injector is replaced
CAUTION:
*: Must be performed “IDLE AIR VOLUME LEARNING” when electric throttle control actuator or ECM is
replaced. Refer to
.
Work Procedure
INFOID:0000000012198272
1.
PRECONDITIONING
Make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.
• Battery temperature: More than 5
°C (41°F)
• Engine coolant temperature: More than 70
°C (158°F)
• Shift lever: P or N
• Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
• Vehicle speed: Stopped
• Transmission: Warmed-up
• Drive vehicle for 10 minutes.
Do you have CONSULT?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
AIR FUEL RATIO INITIAL LEARNING
With CONSULT
1. Perform “ACCELERATOR PEDAL RELEASED POSITION LEARNING”. Refer to
2. Perform “THROTTLE VALVE CLOSED POSITION LEARNING”. Refer to
3. Start engine and warm it up to normal operating temperature.
4. Select “A/F INITIAL LEARNING” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.
5. Touch “START” and wait 20 seconds.
“CMPLT” displayed on CONSULT screen?
YES
>> INSPECTION END
NO
>> GO TO 4.
3.
AIR FUEL RATIO INITIAL LEARNING
Without CONSULT
NOTE:
• It is better to count the time accurately with a clock.
• It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has a mal-
function.
1. Perform “ACCELERATOR PEDAL RELEASED POSITION LEARNING”. Refer to
2. Perform “THROTTLE VALVE CLOSED POSITION LEARNING”. Refer to
3. Start engine and warm it up to normal operating temperature.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
6. Repeat the following procedure quickly five times within 5 seconds.
-
Fully depress the accelerator pedal.
-
Fully release the accelerator pedal.
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