Nissan Pathfinder (2009 year). Instruction — part 309
EC-486
< ON-VEHICLE MAINTENANCE >
[VQ40DE]
EVAP LEAK CHECK
EVAP LEAK CHECK
How to Detect Fuel Vapor Leakage
INFOID:0000000004297673
CAUTION:
• Never use compressed air or a high pressure pump.
• Never exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pressure in EVAP system.
NOTE:
• Do not start engine.
• Improper installation of EVAP service port adapter to the EVAP service port may cause a leak.
WITH CONSULT-III
1.
Attach the EVAP service port adapter securely to the EVAP service port.
2.
Also attach the pressure pump and hose to the EVAP service port adapter.
3.
Turn ignition switch ON.
4.
Select the “EVAP SYSTEM CLOSE” of “WORK SUPPORT MODE” with CONSULT-III.
5.
Touch “START”. A bar graph (Pressure indicating display) will appear on the screen.
6.
Apply positive pressure to the EVAP system until the pressure indicator reaches the middle of the bar
graph.
7.
Remove EVAP service port adapter and hose with pressure pump.
8.
Locate the leak using a leak detector. Refer to
WITHOUT CONSULT-III
1.
Attach the EVAP service port adapter securely to the EVAP ser-
vice port.
2.
Also attach the pressure pump with pressure gauge to the EVAP
service port adapter.
3.
Apply battery voltage between the terminals of EVAP canister
vent control valve (3) to make a closed EVAP system.
-
Fuel filler pipe (top of frame view) (1)
-
EVAP control system pressure sensor (2)
-
EVAP ccanister (4)
-
Drain filter (5)
-
: Vehicle front
4.
To locate the leak, deliver positive pressure to the EVAP system
until pressure gauge points reach 1.38 to 2.76 kPa (0.014 to
0.028 kg/cm
2
, 0.2 to 0.4 psi).
5.
Remove EVAP service port adapter and hose with pressure
pump.
6.
Locate the leak using a leak detector. Refer to
SEF200U
SEF462UA
AWBIA0134ZZ
2009 Pathfinder
EVAP CANISTER
EC-487
< ON-VEHICLE REPAIR >
[VQ40DE]
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ON-VEHICLE REPAIR
EVAP CANISTER
Component Inspection
INFOID:0000000004297674
EVAP CANISTER
Check EVAP canister as follows:
1.
Block port B.
2.
Blow air into port A and check that it flows freely out of port C.
3.
Release blocked port B.
4.
Apply vacuum pressure to port B and check that vacuum pres-
sure exists at the ports A and C.
5.
Block port A and B.
6.
Apply pressure to port C and check that there is no leakage.
Removal and Installation
INFOID:0000000004297675
EVAP CANISTER
Tighten EVAP canister as shown in the figure.
EVAP CANISTER VENT CONTROL VALVE
1.
Turn EVAP canister vent control valve counterclockwise.
2.
Remove the EVAP canister vent control valve.
Always replace O-ring with a new one.
PBIB2568E
BBIA0566E
BBIA0567E
2009 Pathfinder
EC-488
< SERVICE DATA AND SPECIFICATIONS (SDS)
[VQ40DE]
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Fuel Pressure
INFOID:0000000004297676
Idle Speed and Ignition Timing
INFOID:0000000004297677
*: Under the following conditions:
• Air conditioner switch: OFF
• Electric load: OFF (Lights, heater fan & rear window defogger)
• Steering wheel: Kept in straight-ahead position
Calculated Load Value
INFOID:0000000004297678
Mass Air Flow Sensor
INFOID:0000000004297679
*: Engine is warmed up to normal operating temperature and running under no load.
Intake Air Temperature Sensor
INFOID:0000000004297680
Engine Coolant Temperature Sensor
INFOID:0000000004297681
Air Fuel Ratio (A/F) Sensor 1 Heater
INFOID:0000000004297682
Fuel pressure at idling kPa (kg/cm
2
, psi)
Approximately 350 (3.57, 51)
Target idle speed
No load* (in P or N position)
625
±
50 rpm
Air conditioner: ON
In P or N position
625 rpm or more
Ignition timing
In P or N position
15
±
5
°
BTDC
Condition
Calculated load value% (Using CONSULT-III or GST)
At idle
5 - 35
At 2,500 rpm
5 - 35
Supply voltage
Battery voltage (11 - 14V)
Output voltage at idle
0.9 - 1.2*V
Mass air flow (Using CONSULT-III or GST)
2.0 - 6.0 g·m/sec at idle*
7.0 - 20.0 g·m/sec at 2,500 rpm*
Temperature
°
C (
°
F)
Resistance k
Ω
25 (77)
1.800 - 2.200
Temperature
°
C (
°
F)
Resistance k
Ω
20 (68)
2.1 - 2.9
50 (122)
0.68 - 1.00
90 (194)
0.236 - 0.260
Resistance [at 25
°
C (77
°
F)]
1.80 - 2.44
Ω
2009 Pathfinder
SERVICE DATA AND SPECIFICATIONS (SDS)
EC-489
< SERVICE DATA AND SPECIFICATIONS (SDS)
[VQ40DE]
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Heated Oxygen sensor 2 Heater
INFOID:0000000004297683
Crankshaft Position Sensor (POS)
INFOID:0000000004297684
EC-215, "Component Inspection"
Camshaft Position Sensor (PHASE)
INFOID:0000000004297685
EC-220, "Component Inspection"
Throttle Control Motor
INFOID:0000000004297686
Fuel Injector
INFOID:0000000004297687
Fuel Pump
INFOID:0000000004297688
Resistance [at 25
°
C (77
°
F)]
9.9 - 13.3
Ω
Resistance [at 25
°
C (77
°
F)]
Approximately 1 - 15
Ω
Resistance [at 10 - 60
°
C (50 - 140
°
F)]
11.1 - 14.5
Ω
Resistance [at 25
°
C (77
°
F)]
0.2 - 5.0
Ω
2009 Pathfinder
EC-490
< BASIC INSPECTION >
[VK56DE]
DIAGNOSIS AND REPAIR WORK FLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Trouble Diagnosis Introduction
INFOID:0000000003936452
INTRODUCTION
The engine has an ECM to control major systems such as fuel con-
trol, ignition control, idle air control system, etc. The ECM accepts
input signals from sensors and instantly drives actuators. It is essen-
tial that both input and output signals are proper and stable. At the
same time, it is important that there are no malfunctions such as vac-
uum leakage, fouled spark plugs, or other malfunctions with the
engine.
It is much more difficult to diagnose an incident that occurs intermit-
tently rather than continuously. Most intermittent incidents are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only may not find the cause of the incidents. A road
test with CONSULT-III (or GST) or a circuit tester connected should
be performed. Follow the Work Flow on "WORK FLOW".
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Diagnostic Worksheet like the example
on "Worksheet Sample" should be used.
Start your diagnosis by looking for conventional malfunctions first.
This will help troubleshoot driveability malfunctions on an electroni-
cally controlled engine vehicle.
WORK FLOW
MEF036D
SEF233G
SEF234G
2009 Pathfinder
DIAGNOSIS AND REPAIR WORK FLOW
EC-491
< BASIC INSPECTION >
[VK56DE]
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Overall Sequence
Detailed Flow
1.
GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred) using the DIAGNOSTIC WORKSHEET.
>> GO TO 2.
JMBIA1416GB
2009 Pathfinder
EC-492
< BASIC INSPECTION >
[VK56DE]
DIAGNOSIS AND REPAIR WORK FLOW
2.
CHECK DTC
1.
Check DTC.
2.
Perform the following procedure if DTC is displayed.
-
Record DTC and freeze frame data. (Print them out with CONSULT-III or GST.)
-
Erase DTC. (Refer to
EC-525, "Emission-related Diagnostic Information"
.)
-
Study the relationship between the cause detected by DTC and the symptom described by the customer.
(Symptom Matrix Chart is useful. Refer to
EC-940, "Symptom Matrix Chart"
3.
Check related service bulletins for information.
Are any symptoms described and any DTCs detected?
Symptom is described, DTC is displayed>>GO TO 3.
Symptom is described, DTC is not displayed>>GO TO 4.
Symptom is not described, DTC is displayed>>GO TO 5.
3.
CONFIRM THE SYMPTOM
Try to confirm the symptom described by the customer (except MIL ON).
DIAGNOSIS WORKSHEET is useful to verify the incident.
Also study the normal operation and fail-safe related to the symptom. Refer to
No Load and High Engine Speed)"
.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 5.
4.
CONFIRM THE SYMPTOM
Try to confirm the symptom described by the customer.
DIAGNOSIS WORK SHEET is useful to verify the incident.
Also study the normal operation and fail-safe related to the symptom. Refer to
No Load and High Engine Speed)"
.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 6.
5.
PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC Confirmation Procedure for the displayed DTC, and then check that DTC is detected again.
If two or more DTCs are detected, refer to
EC-921, "DTC Inspection Priority Chart"
and determine trouble
diagnosis order.
NOTE:
• Freeze frame data is useful if the DTC is not detected.
• Perform Overall Function Check if DTC Confirmation Procedure is not included on Instruction. This
simplified check procedure is an effective alternative though DTC cannot be detected during this check.
If the result of Overall Function Check is NG, it is the same as the detection of DTC by DTC Confirmation
Procedure.
Is DTC detected?
Yes
>> GO TO 10.
No
>> Check according to WORK FLOW.
6.
PERFORM BASIC INSPECTION
Perform
With CONSULT-III>>GO TO 7.
Without CONSULT-III>>GO TO 9.
7.
PERFORM SPEC IN DATA MONITOR MODE
With CONSULT-III
Check that “MAS A/F SE-B1”, “B/FUEL SCHDL”, and “A/F ALPHA-B1”, “A/F ALPHA-B2” are within the SP
value using CONSULT-III “SPEC” in “DATA MONITOR” mode. Refer to
EC-557, "Inspection Procedure"
.
Are they within the SP value?
Yes
>> GO TO 9.
2009 Pathfinder
DIAGNOSIS AND REPAIR WORK FLOW
EC-493
< BASIC INSPECTION >
[VK56DE]
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No
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Detect malfunctioning part according to
.
Is a malfunctioning part detected?
Yes
>> GO TO 11.
No
>> GO TO 9.
9.
DETECT MALFUNCTIONING SYSTEM BY SYMPTOM MATRIX CHART
Detect malfunctioning system according to
EC-940, "Symptom Matrix Chart"
based on the confirmed symptom
in step 4, and determine the trouble diagnosis order based on possible causes and symptoms.
>> GO TO 10.
10.
DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic Procedure in EC section described based on open circuit inspection. A short circuit inspection
is also required for the circuit check in the Diagnostic Procedure. For details, refer to Circuit Inspection in
Is a malfunctioning part detected?
Yes
>> GO TO 11.
No
>> Monitor input data from related sensors using CONSULT-III or check voltage of related ECM ter-
EC-887, "CONSULT-III Reference Value in Data Monitor Mode"
11.
REPAIR OR REPLACE THE MALFUNCTIONING PART
1.
Repair or replace the malfunctioning part.
2.
Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-
ment.
3.
Check DTC. If DTC is displayed, erase it, refer to
EC-525, "Emission-related Diagnostic Information"
.
>> GO TO 12.
12.
FINAL CHECK
When DTC was detected in step 2, perform DTC Confirmation Procedure or Overall Function Check again,
and then check that the malfunction have been completely repaired.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and check that
the symptom is not detected.
OK or NG
NG (DTC is detected)>>GO TO 10.
NG (Symptom remains)>>GO TO 6.
OK
>> 1.
Before returning the vehicle to the customer, always erase unnecessary DTC in ECM and
TCM. (Refer to
EC-525, "Emission-related Diagnostic Information"
2.
If the completion of SRT is needed, drive vehicle under the specific driving pattern. Refer to
Driving Pattern in
EC-525, "Emission-related Diagnostic Information"
.
3.
INSPECTION END
DIAGNOSTIC WORKSHEET
Description
2009 Pathfinder
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