Nissan Frontier D40. Instruction — part 333
INSPECTION AND ADJUSTMENT
EC-23
< BASIC INSPECTION >
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2.
Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
EC-23, "Procedure After Replacing ECM"
.
>> GO TO 4.
19.
INSPECTION END
Did you replace ECM, referring this Basic Inspection procedure?
Yes or No
Yes
>> 1.
2.
INSPECTION END
No
>> INSPECTION END
Idle Speed and Ignition Timing Check
INFOID:0000000005273020
IDLE SPEED
With CONSULT-III
Check idle speed in “DATA MONITOR” mode with CONSULT-III.
With GST
Check idle speed in Service $01 with GST.
IGNITION TIMING
Any of following two methods may be used.
1.
Attach timing light to loop wire as shown.
2.
Check ignition timing.
Procedure After Replacing ECM
INFOID:0000000005273021
When replacing ECM, the following procedure must be performed.
1.
Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
SEC-7, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"
.
2.
3.
EC-24, "Accelerator Pedal Released Position Learning"
4.
EC-24, "Throttle Valve Closed Position Learning"
.
5.
EC-24, "Idle Air Volume Learning"
BBIA0644E
BBIA0633E
EC-24
< BASIC INSPECTION >
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INSPECTION AND ADJUSTMENT
VIN Registration
INFOID:0000000005273022
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 may be required for Inspection & Maintenance (I/M).
OPERATION PROCEDURE
With CONSULT-III
1.
Check the VIN of the vehicle and note it. Refer to
.
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:0000000005273023
DESCRIPTION
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.
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 Closed Position Learning
INFOID:0000000005273024
DESCRIPTION
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.
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:0000000005273025
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 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 following conditions are missed for even a moment.
• Battery voltage: More than 12.9V (At idle)
• Engine coolant temperature: 70 - 95
°
C (158 - 212
°
F)
• Selector lever position: P or N (A/T), Neutral (M/T)
• Electric load switch: OFF
(Air conditioner, headlamp)
INSPECTION AND ADJUSTMENT
EC-25
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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
- A/T models
• 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.
- M/T models: Drive vehicle for 10 minutes.
OPERATION PROCEDURE
With CONSULT-III
1.
EC-24, "Accelerator Pedal Released Position Learning"
2.
EC-24, "Throttle Valve Closed Position Learning"
.
3.
Start engine and warm it up to normal operating temperature.
4.
Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5.
Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.
6.
Touch “START” and wait 20 seconds.
7.
Make sure that “CMPLT” is displayed on CONSULT-III screen. If “CMPLT” is not displayed, Idle Air Vol-
ume Learning will not be carried out successfully. In this case, find the cause of the incident by referring to
the DIAGNOSTIC PROCEDURE below.
8.
Rev up the engine two or three times and make sure that idle speed and ignition timing are within the
specifications. Refer to
EC-23, "Idle Speed and Ignition Timing Check"
.
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.
EC-24, "Accelerator Pedal Released Position Learning"
2.
EC-24, "Throttle Valve Closed Position Learning"
.
3.
Start engine and warm it up to normal operating temperature.
4.
Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5.
Turn ignition switch OFF and wait at least 10 seconds.
6.
Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
7.
Repeat the following procedure quickly 5 times within 5 seconds.
a.
Fully depress the accelerator pedal.
b.
Fully release the accelerator pedal.
8.
Wait 7 seconds, fully depress the accelerator pedal for approx. 20 seconds until the MIL stops blinking
and turns ON.
9.
Fully release the accelerator pedal within 3 seconds after the MIL turns ON.
10. Start engine and let it idle.
ITEM
SPECIFICATION
Idle speed
M/T: 625
±
50 rpm (in Neutral position)
A/T: 700
±
50 rpm (in P or N position)
Ignition timing
M/T: 15
±
5
°
BTDC (in Neutral position)
A/T: 15
±
5
°
BTDC (in P or N position)
EC-26
< BASIC INSPECTION >
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INSPECTION AND ADJUSTMENT
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the
specifications. Refer to
EC-23, "Idle Speed and Ignition Timing Check"
.
13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried
out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE-
DURE below.
DIAGNOSTIC PROCEDURE
If idle air volume learning cannot be performed successfully, proceed as follows:
1.
Check that throttle valve is fully closed.
2.
Check PCV valve operation.
3.
Check that downstream of throttle valve is free from air leakage.
4.
When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and eliminate the cause of the incident.
It is useful to perform
.
5.
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.
ITEM
SPECIFICATION
Idle speed
M/T: 625
±
50 rpm (in Neutral position)
A/T: 700
±
50 rpm (in P or N position)
Ignition timing
M/T: 15
±
5
°
BTDC (in Neutral position)
A/T: 15
±
5
°
BTDC (in P or N position)
SEC897C
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