Nissan Teana J32. Instruction — part 369
EC-14
< BASIC INSPECTION >
[VQ25DE, VQ35DE]
INSPECTION AND ADJUSTMENT
2.
GO TO 4.
18.
CHECK ECM FUNCTION
1.
Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident,
although this is rare.)
2.
Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
EC-14, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"
>> GO TO 4.
19.
INSPECTION END
Did you replace ECM, referring this Basic Inspection procedure?
Yes or No
Yes
EC-14, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair
No
>> INSPECTION END
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description
INFOID:0000000003856445
When replacing ECM, the following procedure must be performed.
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement
INFOID:0000000003856446
1.
PERFORM INITIALIZATION OF NVIS (NATS) SYSTEM AND REGISTRATION OF ALL NVIS (NATS) IGNI-
TION KEY IDS
SEC-8, "ECM RE-COMMUNICATING FUNCTION : Description"
>> GO TO 2.
2.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
Refer to
EC-15, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement"
.
>> GO TO 3.
3.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
EC-16, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 4.
4.
PERFORM IDLE AIR VOLUME LEARNING
EC-16, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
.
>> END
IDLE SPEED
IDLE SPEED : Description
INFOID:0000000003856447
This describes how to check the idle speed. For the actual procedure, follow the instructions in “BASIC
INSPECTION”.
IDLE SPEED : Special Repair Requirement
INFOID:0000000003856448
1.
CHECK IDLE SPEED
With CONSULT-III
INSPECTION AND ADJUSTMENT
EC-15
< BASIC INSPECTION >
[VQ25DE, VQ35DE]
C
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EC
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Check idle speed in “DATA MONITOR” mode with CONSULT-III.
With GST
Check idle speed with Service $01 of GST.
>> INSPECTION END
IGNITION TIMING
IGNITION TIMING : Description
INFOID:0000000003856449
This describes how to check the ignition timing. For the actual procedure, follow the instructions in “BASIC
INSPECTION”.
IGNITION TIMING : Special Repair Requirement
INFOID:0000000003856450
1.
CHECK IGNITION TIMING
1.
Attach timing light to loop wires as shown.
2.
Check ignition timing.
>> INSPECTION END
ACCELERATOR PEDAL RELEASED POSITION LEARNING
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Description
INFOID:0000000003856453
Accelerator Pedal Released Position Learning is an operation to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time
the harness connector of the accelerator pedal position sensor or ECM is disconnected.
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Re-
quirement
INFOID:0000000003856454
1.
START
1.
Check 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.
>> END
A
: Timing light
: Vehicle front
JMBIA1388ZZ
JMBIA1135GB
EC-16
< BASIC INSPECTION >
[VQ25DE, VQ35DE]
INSPECTION AND ADJUSTMENT
THROTTLE VALVE CLOSED POSITION LEARNING
THROTTLE VALVE CLOSED POSITION LEARNING : Description
INFOID:0000000003856455
Throttle Valve Closed Position Learning is an operation to learn 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.
THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement
INFOID:0000000003856456
1.
START
1.
Check that accelerator pedal is fully released.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
Check that throttle valve moves during above 10 seconds by confirming the operating sound.
>> END
IDLE AIR VOLUME LEARNING
IDLE AIR VOLUME LEARNING : Description
INFOID:0000000003856457
Idle Air Volume Learning is a function of ECM to learn the idle air volume that keeps engine idle speed within
the specific range. It must be performed under the following conditions:
• Each time electric throttle control actuator or ECM is replaced.
• Idle speed or ignition timing is out of specification.
IDLE AIR VOLUME LEARNING : Special Repair Requirement
INFOID:0000000003856458
1.
PRECONDITIONING
Before performing Idle Air Volume Learning, check 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 12.9 V (At idle)
• Engine coolant temperature: 70 - 100
°
C (158 - 212
°
F)
• Selector lever: P or N
• Electric load switch: OFF
(Air conditioner, head lamp, rear window defogger)
- For vehicle equipped with daytime light systems, perform one of the following procedures before
starting engine not to illuminate headlamps.
• Apply parking brake
• Set lighting switch to the 1st position
• Steering wheel: Neutral (Straight-ahead position)
• Vehicle speed: Stopped
• Transmission: Warmed-up
- With CONSULT-III: Drive vehicle until “ATF TEMP SEN” in “DATA MONITOR” mode of “CVT” system indi-
cates less than 0.9 V.
- Without CONSULT-III: Drive vehicle for 10 minutes.
Will CONSULT-III be used?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
PERFORM IDLE AIR VOLUME LEARNING
With CONSULT-III
1.
Perform
EC-15, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-
2.
EC-16, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
3.
Start engine and warm it up to normal operating temperature.
4.
Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.
5.
Touch “START” and wait 20 seconds.
INSPECTION AND ADJUSTMENT
EC-17
< BASIC INSPECTION >
[VQ25DE, VQ35DE]
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Is “CMPLT” displayed on CONSULT-III screen?
YES
>> GO TO 4.
NO
>> GO TO 5.
3.
PERFORM IDLE AIR VOLUME LEARNING
Without CONSULT-III
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
EC-15, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-
.
2.
EC-16, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
.
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 5 times within 5 seconds.
-
Fully depress the accelerator pedal.
-
Fully release the accelerator pedal.
7.
Wait 7 seconds, fully depress the accelerator pedal for approx. 20 seconds until the MI stops blinking and
turns ON.
8.
Fully release the accelerator pedal within 3 seconds after the MI turns 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 2 or 3 times and check that idle speed and ignition timing are within the specifications.
For procedure, refer to
EC-14, "IDLE SPEED : Special Repair Requirement"
.
For specifications, refer to
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART-I
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-II
When the above three items check out OK, engine component parts and their installation condition are ques-
tionable. Check and eliminate the cause of the incident.
It is useful to perform “TROUBLE DIAGNOSIS - SPECIFICATION VALUE”. Refer to
PBIB0665E
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