Infiniti EX35. Manual — part 569
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EC-18
< BASIC INSPECTION >
[VQ35HR]
INSPECTION AND ADJUSTMENT
• 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:0000000003133242
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 12.9V (At idle)
• Engine coolant temperature: 70 - 105
°
C (158 - 221
°
F)
• Selector lever: P or N
• Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is
started the headlamp will not be illuminated.
• Steering wheel: Neutral (Straight-ahead position)
• Vehicle speed: Stopped
• Transmission: Warmed-up
- With CONSULT-III: Drive vehicle until “ATF TEMP SE 1” in “DATA MONITOR” mode of “A/T” system indi-
cates less than 0.9V.
- Without CONSULT-III: Drive vehicle for 10 minutes.
Do you have CONSULT-III?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
PERFORM IDLE AIR VOLUME LEARNING
With CONSULT-III
1.
Perform Accelerator Pedal Released Position Learning. Refer to
RELEASED POSITION LEARNING : Special Repair Requirement"
2.
Perform Throttle Valve Closed Position Learning.
EC-17, "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.
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 Accelerator Pedal Released Position Learning. Refer to
RELEASED POSITION LEARNING : Special Repair Requirement"
2.
Perform Throttle Valve Closed Position Learning.
EC-17, "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 five times within 5 seconds.
-
Fully depress the accelerator pedal.
-
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.
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INSPECTION AND ADJUSTMENT
EC-19
< BASIC INSPECTION >
[VQ35HR]
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10. Wait 20 seconds.
>> GO TO 4.
4.
CHECK IDLE SPEED AND IGNITION TIMING
Rev up the engine two or three times and check that idle speed and ignition timing are within the specifica-
tions. 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
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
EXHAUST VALVE TIMING CONTROL LEARNING
EXHAUST VALVE TIMING CONTROL LEARNING : Description
INFOID:0000000003133243
Exhaust Valve Timing Control Learning is a function of ECM to learn the characteristic of exhaust valve timing
control magnet retarder by comparing the target angle of exhaust camshaft with the actual retarded angle of
exhaust camshaft. It must be performed each time exhaust valve timing control magnet retarder is discon-
nected or replaced, or ECM is replaced.
EXHAUST VALVE TIMING CONTROL LEARNING : Special Repair Requirement
INFOID:0000000003133244
1.
START
With CONSULT-III
1.
Start engine and warm it up to normal operating temperature.
2.
Set selector lever to N position and confirm that following electrical or mechanical loads are not applied.
-
Headlamp switch is OFF
-
Air conditioner switch is OFF
SEC897C
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EC-20
< BASIC INSPECTION >
[VQ35HR]
INSPECTION AND ADJUSTMENT
-
Rear defogger switch is OFF
-
Steering wheel is in the straight-ahead position, etc.
3.
Keep the engine speed between 1,800 and 2,000 rpm.
4.
Select “EXH V/T CONTROL LEARN” in “WORK SUPPORT” mode with CONSULT-III.
5.
Touch “START” and wait 20 seconds.
6.
Check that “CMPLT” is displayed on CONSULT-III screen.
Without CONSULT-III
1.
Start engine and warm it up to normal operating temperature.
2.
Set selector lever to N position and confirm that following electrical or mechanical loads are not applied.
-
Headlamp switch is OFF
-
Air conditioner switch is OFF
-
Rear defogger switch is OFF
-
Steering wheel is in the straight-ahead position, etc.
3.
Keep the engine speed between 1,800 and 2,000 rpm at 20 seconds.
>> END
MIXTURE RATIO SELF-LEARNING VALUE CLEAR
MIXTURE RATIO SELF-LEARNING VALUE CLEAR : Description
INFOID:0000000003133245
This describes how to erase the mixture ratio self-learning value. For the actual procedure, follow the instruc-
tions in “Diagnosis Procedure”.
MIXTURE RATIO SELF-LEARNING VALUE CLEAR : Special Repair Requirement
INFOID:0000000003133246
1.
START
With CONSULT-III
1.
Start engine and warm it up to normal operating temperature.
2.
Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-III.
3.
Clear mixture ratio self-learning value by touching “CLEAR”.
With GST
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF.
3.
Disconnect mass air flow sensor (bank 1) harness connector.
4.
Restart engine and let it idle for at least 5 seconds.
5.
Stop engine and reconnect mass air flow sensor (bank 1) harness connector.
6.
Select Service $03 with GST. Check DTC P0102 is detected.
7.
Select Service $04 with GST to erase the DTC P0102.
>> END
Learning completed
: CMPLT
Learning not yet
: YET
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ENGINE CONTROL SYSTEM
EC-21
< FUNCTION DIAGNOSIS >
[VQ35HR]
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FUNCTION DIAGNOSIS
ENGINE CONTROL SYSTEM
System Diagram
INFOID:0000000003133247
1.
ECM
2.
Data link connector
3.
MIL
4.
Ignition switch
5.
Cooling fan control module
6.
Cooling fan
7.
PNP signal
8.
A/F sensor 1
9.
Heated oxygen sensor 2
10. Exhaust valve timing control magnet
retarder
11.
Exhaust valve timing control position
sensor
12. PCV valve
13. Spark plug
14. Camshaft position sensor (PHASE)
15. Intake valve timing control solenoid
valve
16. Fuel injector
17. Engine coolant temperature sensor
18. Fuel injector
19. Intake valve timing control solenoid
valve
20. Camshaft position sensor (PHASE)
21. Spark plug
JMBIA1269GB
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