Nissan Pathfinder (2012 year). Manual — part 314
INSPECTION AND ADJUSTMENT
EC-593
< BASIC INSPECTION >
[VK56DE]
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2. Rev engine between 2,000 and 3,000 rpm 2 or 3 times under no
load, then run engine at idle speed for approximately 1 minute.
3. Read idle speed in “DATA MONITOR” mode with CONSULT.
EC-596, "Idle Speed and Ignition Timing Check"
Without CONSULT
1. Run engine at approximately 2,000 rpm for approximately 2 minutes under no load.
2. Rev engine between 2,000 and 3,000 rpm 2 or 3 times under no load, then run engine at idle speed for
approximately 1 minute.
3. Check idle speed.
EC-596, "Idle Speed and Ignition Timing Check"
OK or NG
OK
>> GO TO 10.
NG
>> GO TO 4.
4.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform
EC-597, "Accelerator Pedal Released Position Learning"
.
>> GO TO 5.
5.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform
EC-597, "Throttle Valve Closed Position Learning"
.
>> GO TO 6.
6.
PERFORM IDLE AIR VOLUME LEARNING
EC-597, "Idle Air Volume Learning"
Is Idle Air Volume Learning carried out successfully?
Yes or No
Yes
>> GO TO 7.
No
>> 1. Follow the instructions of Idle Air Volume Learning.
2. GO TO 4.
7.
CHECK TARGET IDLE SPEED AGAIN
With CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with CONSULT.
EC-596, "Idle Speed and Ignition Timing Check"
Without CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
EC-596, "Idle Speed and Ignition Timing Check"
OK or NG
650
±
50 rpm (in P or N position)
PBIA8513J
650
±
50 rpm (in P or N position)
650
±
50 rpm (in P or N position)
650
±
50 rpm (in P or N position)
August 2012
2012 Pathfinder
EC-594
< BASIC INSPECTION >
[VK56DE]
INSPECTION AND ADJUSTMENT
OK
>> GO TO 10.
NG
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
• Check camshaft position sensor (PHASE) and circuit. Refer to
EC-749, "DTC Confirmation Procedure"
• Check crankshaft position sensor (POS) and circuit. Refer to
EC-745, "DTC Confirmation Procedure"
.
OK or NG
OK
>> GO TO 9.
NG
>> 1. Repair or replace malfunctioning part.
2. GO TO 4.
9.
CHECK ECM FUNCTION
1. Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident,
but this is rare.)
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
SEC-10, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"
system),
SEC-120, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"
(without
intelligent key system).
>> GO TO 4.
10.
CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light.
EC-596, "Idle Speed and Ignition Timing Check"
OK or NG
OK
>> GO TO 19.
NG
>> GO TO 11.
11.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform
EC-597, "Accelerator Pedal Released Position Learning"
>> GO TO 12.
12.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform
EC-597, "Throttle Valve Closed Position Learning"
.
>> GO TO 13.
13.
PERFORM IDLE AIR VOLUME LEARNING
EC-597, "Idle Air Volume Learning"
Is Idle Air Volume Learning carried out successfully?
Yes or No
Yes
>> GO TO 14.
No
>> 1. Follow the instructions of Idle Air Volume Learning.
2. GO TO 4.
14.
CHECK TARGET IDLE SPEED AGAIN
With CONSULT
1. Start engine and warm it up to normal operating temperature.
15
±
5
°
BTDC (in P or N position)
BBIA0379E
August 2012
2012 Pathfinder
INSPECTION AND ADJUSTMENT
EC-595
< BASIC INSPECTION >
[VK56DE]
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2. Read idle speed in “DATA MONITOR” mode with CONSULT.
EC-596, "Idle Speed and Ignition Timing Check"
Without CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
EC-596, "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.
EC-596, "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-194, "Removal and Installation"
OK or NG
OK
>> GO TO 17.
NG
>> 1. Repair the timing chain installation. Refer to
2. GO TO 4.
17.
DETECT MALFUNCTIONING PART
Check the following.
• Check camshaft position sensor (PHASE) and circuit. Refer to
EC-749, "DTC Confirmation Procedure"
• Check crankshaft position sensor (POS) and circuit. Refer to
EC-745, "DTC Confirmation Procedure"
.
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.)
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
SEC-10, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"
(with intelligent key
system),
SEC-120, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"
(without
intelligent key system).
>> GO TO 4.
19.
INSPECTION END
If ECM is replaced during this Basic Inspection procedure, perform
EC-596, "Procedure After Replacing
650
±
50 rpm (in P or N position)
650
±
50 rpm (in P or N position)
15
±
5
°
BTDC (in P or N position)
BBIA0379E
August 2012
2012 Pathfinder
EC-596
< BASIC INSPECTION >
[VK56DE]
INSPECTION AND ADJUSTMENT
>> INSPECTION END
Idle Speed and Ignition Timing Check
INFOID:0000000007358457
IDLE SPEED
With CONSULT
Check idle speed in “DATA MONITOR” mode with CONSULT.
With GST
Check idle speed with GST.
IGNITION TIMING
1. Attach timing light to loop wire as shown.
2. Check ignition timing.
Procedure After Replacing ECM
INFOID:0000000007358458
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.
SEC-10, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"
(with intelli-
gent key system),
SEC-120, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"
(without intelligent key system).
2. Perform
3. Perform
EC-597, "Accelerator Pedal Released Position Learning"
4. Perform
EC-597, "Throttle Valve Closed Position Learning"
5. Perform
EC-597, "Idle Air Volume Learning"
.
VIN Registration
INFOID:0000000007358459
DESCRIPTION
VIN Registration is a function of ECM 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
BBIA0377E
BBIA0379E
August 2012
2012 Pathfinder
INSPECTION AND ADJUSTMENT
EC-597
< BASIC INSPECTION >
[VK56DE]
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With CONSULT
1. Check the VIN of the vehicle and note it. Refer to
GI-21, "Identification Number"
.
2. Turn ignition switch ON with engine stopped.
3. Select “VIN REGISTRATION” in “WORK SUPPORT” mode.
4. Follow the instructions on the CONSULT display.
Accelerator Pedal Released Position Learning
INFOID:0000000007358460
DESCRIPTION
Accelerator Pedal Released Position Learning is a function of ECM to learn the fully released position of the
accelerator 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:0000000007358461
DESCRIPTION
Throttle Valve Closed Position Learning is a function of ECM 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 con-
nector of the 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 wait at least 10 seconds.
heck that throttle valve moves during above 10 seconds by confirming the operating sound.
Idle Air Volume Learning
INFOID:0000000007358462
DESCRIPTION
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 the electric throttle control actuator or ECM is replaced.
• Idle speed or ignition timing is out of the 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 12.9V (At idle)
• Engine coolant temperature: 70 - 100
°
C (158 - 212
°
F)
• Selector lever position: 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: Drive vehicle until “ATF TEMP SE 1” in “DATA MONITOR” mode of “A/T” system indicates
less than 0.9 V.
- Without CONSULT: Drive vehicle for 10 minutes.
OPERATION PROCEDURE
August 2012
2012 Pathfinder
EC-598
< BASIC INSPECTION >
[VK56DE]
INSPECTION AND ADJUSTMENT
With CONSULT
1. Perform
EC-597, "Accelerator Pedal Released Position Learning"
2. Perform
EC-597, "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 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 engine 2 or 3 times and check that idle speed and ignition timing are within the specifications.
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
EC-597, "Accelerator Pedal Released Position Learning"
2. Perform
EC-597, "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. Check 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 approximately 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.
11. Wait 20 seconds.
12. Rev up engine 2 or 3 times and check that idle speed and ignition timing are within the specifications.
ITEM
SPECIFICATION
Idle speed
650
±
50 rpm (in P or N position)
Ignition timing
15
±
5
°
BTDC (in P or N position)
ITEM
SPECIFICATION
Idle speed
650
±
50 rpm (in P or N position)
Ignition timing
15
±
5
°
BTDC (in P or N position)
SEC897C
August 2012
2012 Pathfinder
INSPECTION AND ADJUSTMENT
EC-599
< BASIC INSPECTION >
[VK56DE]
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13. If idle speed and ignition timing are not within the specifications, Idle Air Volume Learning will not be car-
ried 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 per the following:
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
EC-612, "Inspection Procedure"
.
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 again:
•
Engine stalls.
•
Erroneous idle.
Mixture Ratio Self-Learning Value Clear
INFOID:0000000007824621
DESCRIPTION
This describes how to erase the mixture ratio self-learning value. For the actual procedure, follow the instruc-
tions in “Diagnosis Procedure”.
OPERATION PROCEDURE
1.
START
With CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT.
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 harness connector.
4. Restart engine and let it idle for at least 5 seconds.
5. Stop engine and reconnect mass air flow sensor 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
August 2012
2012 Pathfinder
EC-600
< BASIC INSPECTION >
[VK56DE]
HOW TO SET SRT CODE
HOW TO SET SRT CODE
Description
INFOID:0000000007799380
OUTLINE
In order to set all SRTs, the self-diagnoses as in the “SRT ITEM” table must have been performed at least
once. Each diagnosis may require actual driving for a long period of time under various conditions.
SRT ITEM
The table below shows required self-diagnostic items to set the SRT to “CMPLT”.
*: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the priority for
models with CONSULT.
SRT SERVICE PROCEDURE
If a vehicle has failed the state emissions inspection due to one or more SRT items indicating “INCMP”, review
the flowchart diagnostic sequence, referring to the following flowchart.
SRT item
(CONSULT indication)
Performance
Priority*
Required self-diagnostic items to set the SRT to “CMPLT”
Corresponding
DTC No.
CATALYST
2
Three way catalyst function
P0420, P0430
EVAP SYSTEM
2
EVAP control system purge flow monitoring
P0441
1
EVAP control system
P0442
2
EVAP control system
P0456
HO2S
2
Air fuel ratio (A/F) sensor 1
P0133, P0153
Heated oxygen sensor 2
P0137, P0157
Heated oxygen sensor 2
P0138, P0158
Heated oxygen sensor 2
P0139, P0159
August 2012
2012 Pathfinder
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