Nissan Frontier D40. Instruction — part 445
INSPECTION AND ADJUSTMENT
EC-471
< BASIC INSPECTION >
[VQ40DE]
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Yes or No
Yes
>> GO TO 14.
No
>> 1.
Follow the instruction of Idle Air Volume Learning.
2.
GO TO 4.
14.
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-472, "Idle Speed and Ignition Timing Check"
Without CONSULT-III
1.
Start engine and warm it up to normal operating temperature.
2.
EC-472, "Idle Speed and Ignition Timing Check"
OK or NG
OK
>> GO TO 15.
NG
>> GO TO 17.
15.
CHECK IGNITION TIMING AGAIN
1.
Run engine at idle.
2.
Check ignition timing with a timing light.
Refer to
EC-472, "Idle Speed and Ignition Timing Check"
OK or NG
OK
>> GO TO 19.
NG
>> GO TO 16.
16.
CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to
EM-173, "Removal and Installation"
OK or NG
OK
>> GO TO 17.
NG
>> 1.
Repair the timing chain installation.
2.
GO TO 4.
17.
DETECT MALFUNCTIONING PART
Check the following.
• Check camshaft position sensor (PHASE) and circuit. Refer to
• Check crankshaft position sensor (POS) and circuit. Refer to
OK or NG
OK
>> GO TO 18.
NG
>> 1.
Repair or replace.
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.)
M/T: 625
±
50 rpm (in Neutral position)
A/T: 625
±
50 rpm (in P or N position)
M/T: 625
±
50 rpm (in Neutral position)
A/T: 625
±
50 rpm (in P or N position)
M/T: 15
±
5
°
BTDC (in Neutral position)
A/T: 15
±
5
°
BTDC (in P or N position)
BBIA0531E
EC-472
< BASIC INSPECTION >
[VQ40DE]
INSPECTION AND ADJUSTMENT
2.
Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
SEC-7, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"
.
>> GO TO 4.
19.
INSPECTION END
Did you replace the ECM, referring this Basic Inspection Procedure?
Yes or No
Yes
>> 1.
2.
INSPECTION END
No
>> INSPECTION END
Idle Speed and Ignition Timing Check
INFOID:0000000005273465
IDLE SPEED
With CONSULT-III
Check idle speed in “DATA MONITOR” mode with CONSULT-III.
With GST
Check idle speed with GST.
IGNITION TIMING
1.
Attach timing light to loop wire as shown.
2.
Check ignition timing.
Any of following two methods may be used.
Procedure After Replacing ECM
INFOID:0000000005273466
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, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"
.
2.
3.
EC-473, "Accelerator Pedal Released Position Learning"
4.
EC-473, "Throttle Valve Closed Position Learning"
5.
EC-473, "Idle Air Volume Learning"
.
BBIA0530E
BBIA0531E
INSPECTION AND ADJUSTMENT
EC-473
< BASIC INSPECTION >
[VQ40DE]
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VIN Registration
INFOID:0000000005273467
DESCRIPTION
VIN Registration is an operation to register 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 with engine stopped.
3.
Select “VIN REGISTRATION” in “WORK SUPPORT” mode.
4.
Follow the instruction on the CONSULT-III display.
Accelerator Pedal Released Position Learning
INFOID:0000000005273468
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.
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.
Throttle Valve Closed Position Learning
INFOID:0000000005273469
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 the harness connector of
electric throttle control actuator or ECM is disconnected.
OPERATION PROCEDURE
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 the above 10 seconds by confirming the operating sound.
Idle Air Volume Learning
INFOID:0000000005273470
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 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, 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)
• PNP switch (M/T): ON
Selector lever (A/T): P or N
• Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
EC-474
< BASIC INSPECTION >
[VQ40DE]
INSPECTION AND ADJUSTMENT
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is
started the headlamp will not illuminate.
• Steering wheel: Neutral (Straight-ahead position)
• Vehicle speed: Stopped
• Transmission: Warmed-up
- With CONSULT-III: Drive vehicle until “ATF TEMP SE” in “DATA MONITOR” mode of “A/T” system indicates
less than 0.9 V.
- Without CONSULT-III: Drive vehicle for 10 minutes.
OPERATION PROCEDURE
With CONSULT-III
1.
EC-473, "Accelerator Pedal Released Position Learning"
2.
EC-473, "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.
Check that “CMPLT” is displayed on CONSULT-III screen. If “CMPLT” is not displayed, Idle Air Volume
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 check that idle speed and ignition timing are within the specifi-
cations.
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-473, "Accelerator Pedal Released Position Learning"
2.
EC-473, "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, then turn ignition switch ON and wait 3 seconds.
7.
Repeat the following procedure quickly five 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 it 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: 625
±
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)
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