Nissan Pathfinder (2010 year). Instruction — part 309
EC-564
< FUNCTION DIAGNOSIS >
[VK56DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
*: DTC P1442 and P1456 does not apply to R51 models but appears in DTC Work Support Mode screens.
Generic Scan Tool (GST) Function
INFOID:0000000005257515
DESCRIPTION
Generic Scan Tool (OBD II scan tool) complying with SAE J1978/
ISO 15031-4 has several functions explained below.
ISO15765-4 is used as the protocol.
The name GST or Generic Scan Tool is used in this service instruction.
FUNCTION
Test mode
Test item
Corresponding DTC No.
Reference page
EVAPORATIVE
SYSTEM
PURG FLOW P0441
P0441
EC-708, "DTC Confirmation Procedure"
EVP SML LEAK P0442/P1442*
P0442
EC-714, "DTC Confirmation Procedure"
P0455
EC-749, "DTC Confirmation Procedure"
EVP V/S LEAK P0456/P1456*
P0456
EC-757, "DTC Confirmation Procedure"
PURG VOL CN/V P1444
P0443
EC-721, "DTC Confirmation Procedure"
A/F SEN1
A/F SEN1 (B1) P1276
P0130
EC-630, "DTC Confirmation Procedure"
A/F SEN1 (B1) P1278/P1279
P0133
EC-642, "DTC Confirmation Procedure"
A/F SEN1 (B2) P1286
P0150
EC-630, "DTC Confirmation Procedure"
A/F SEN1 (B2) P1288/P1289
P0153
EC-642, "DTC Confirmation Procedure"
HO2S2
HO2S2 (B1) P0139
P0139
EC-661, "DTC Confirmation Procedure"
HO2S2 (B1) P1146
P0138
EC-653, "DTC Confirmation Procedure"
HO2S2 (B1) P1147
P0137
EC-648, "DTC Confirmation Procedure"
HO2S2 (B2) P0159
P0159
EC-661, "DTC Confirmation Procedure"
HO2S2 (B2) P1166
P0158
EC-653, "DTC Confirmation Procedure"
HO2S2 (B2) P1167
P0157
EC-648, "DTC Confirmation Procedure"
SEF139P
Diagnostic test mode
Function
Service $01
READINESS TESTS
This diagnostic service gains access to current emission-related data values, including analog
inputs and outputs, digital inputs and outputs, and system status information.
Service $02
(FREEZE DATA)
This diagnostic service gains access to emission-related data value which were stored by
ECM during the freeze frame. For details, refer to
EC-536, "Emission-related Diagnostic Infor-
.
Service $03
DTCs
This diagnostic service gains access to emission-related power train trouble codes which
were stored by ECM.
Service $04
CLEAR DIAG INFO
This diagnostic service can clear all emission-related diagnostic information. This includes:
• Clear number of diagnostic trouble codes (Service $01)
• Clear diagnostic trouble codes (Service $03)
• Clear trouble code for freeze frame data (Service $01)
• Clear freeze frame data (Service $02)
• Reset status of system monitoring test (Service $01)
• Clear on board monitoring test results (Service $06 and $07)
Service $06
(ON BOARD TESTS)
This diagnostic service accesses the results of on board diagnostic monitoring tests of specific
components/systems that are not continuously monitored.
2010 Pathfinder
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-565
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INSPECTION PROCEDURE
1. Turn ignition switch OFF.
2. Connect GST to data link connector (1), which is located under
LH dash panel near the hood opener handle.
• Brake pedal (2)
3. Turn ignition switch ON.
4. Enter the program according to instructions on the screen or in
the operation instruction.
(*: Regarding GST screens in this section, sample screens are
shown.)
5. Perform each diagnostic service according to each service pro-
cedure.
For further information, see the GST Operation Instruction of
the tool maker.
Service $07
(ON BOARD TESTS)
This diagnostic service enables the off board test drive to obtain test results for emission-re-
lated powertrain components/systems that are continuously monitored during normal driving
conditions.
Service $08
—
This diagnostic service can close EVAP system in ignition switch ON position (Engine
stopped). When this diagnostic service is performed, the EVAP canister vent control valve can
be closed.
In the following conditions, this diagnostic service cannot function.
• Low ambient temperature
• Low battery voltage
• Engine running
• Ignition switch OFF
• Low fuel temperature
• Too much pressure is applied to EVAP system
Service $09
(CALIBRATION ID)
This diagnostic service enables the off-board test device to request specific vehicle informa-
tion such as Vehicle Identification Number (VIN) and Calibration IDs.
Diagnostic test mode
Function
ALBIA0359ZZ
SEF398S
SEF416S
2010 Pathfinder
EC-566
< COMPONENT DIAGNOSIS >
[VK56DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
COMPONENT DIAGNOSIS
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Description
INFOID:0000000005257516
The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” of “DATA MONI-
TOR” mode of CONSULT-III during normal operation of the Engine Control System. When the value in “SPEC”
of “DATA MONITOR” mode is within the SP value, the Engine Control System is confirmed OK. When the
value in “SPEC” of “DATA MONITOR” mode is NOT within the SP value, the Engine Control System may have
one or more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not illuminate
the MIL.
The SP value will be displayed for the following three items:
• B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board correc-
tion)
• A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)
• MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Testing Condition
INFOID:0000000005257517
• Vehicle driven distance: More than 5,000 km (3,107 miles)
• Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm
2
, 14.25 - 15.12 psi)
• Atmospheric temperature: 20 - 30
°
C (68 - 86
°
F)
• Engine coolant temperature: 75 - 95
°
C (167 - 203
°
F)
• Engine speed: Idle
• Transmission: Warmed-up
- After the engine is warmed up to normal operating temperature, drive vehicle until “ATF TEMP SE 1” (A/T
fluid temperature sensor signal) indicates more than 60
°
C (140
°
F).
• Electrical load: Not applied
- Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.
Inspection Procedure
INFOID:0000000005257518
NOTE:
Perform “SPEC” in “DATA MONITOR” mode in maximum scale display.
1. Perform
2. Check that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2” and “MAS A/F SE-B1” in “SPEC” of “DATA
MONITOR” mode with CONSULT-III.
4. Check that monitor items are within the SP value.
5. If NG, go to
2010 Pathfinder
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
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Diagnosis Procedure
INFOID:0000000005257519
OVERALL SEQUENCE
JMBIA1468GB
2010 Pathfinder
EC-568
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DETAILED PROCEDURE
1.
CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start engine.
2. Check that the testing conditions are met. Refer to
.
3. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each
indication is within the SP value.
NOTE:
PBIB3214E
2010 Pathfinder
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-569
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Check “A/F ALPHA-B1”, “A/F ALPHA-B2” for approximately 1 minute because they may fluctuate. It is NG
if the indication is out of the SP value even a little.
OK or NG
OK
>> GO TO 17.
NG (Less than the SP value)>>GO TO 2.
NG (More than the SP value)>>GO TO 3.
2.
CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and check that the indication is within the SP
value.
OK or NG
OK
>> GO TO 4.
NG (More than the SP value)>>GO TO 19.
3.
CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and check that the indication is within the SP
value.
OK or NG
OK
>> GO TO 6.
NG (More than the SP value)>>GO TO 6.
NG (Less than the SP value)>>GO TO 25.
4.
CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Stop the engine.
2. Disconnect PCV hose, and then plug it.
3. Start engine.
4. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each
indication is within the SP value.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 6.
5.
CHANGE ENGINE OIL
1. Stop the engine.
2. Change engine oil.
NOTE:
This symptom may occur when a large amount of gasoline is mixed with engine oil because of driving
conditions (such as when engine oil temperature does not rise enough since a journey distance is too
short during winter). The symptom will not be detected after changing engine oil or changing driving con-
ditions.
>>
INSPECTION END
6.
CHECK FUEL PRESSURE
Check fuel pressure. (Refer to
OK or NG
OK
>> GO TO 9.
NG (Fuel pressure is too high)>>Replace “fuel level sensor unit, fuel filter and fuel pump assembly”, and
then GO TO 8.
NG (Fuel pressure is too low)>>GO TO 7.
7.
DETECT MALFUNCTIONING PART
1. Check the following.
-
Clogged and bent fuel hose and fuel tube
-
Clogged fuel filter
-
Fuel pump and its circuit (Refer to
2. If NG, repair or replace the malfunctioning part. (Refer to
If OK, replace “fuel level sensor unit, fuel filter and fuel pump assembly”.
2010 Pathfinder
EC-570
< COMPONENT DIAGNOSIS >
[VK56DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
>> GO TO 8.
8.
CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start engine.
2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each
indication is within the SP value.
OK or NG
OK
>>
INSPECTION END
NG
>> GO TO 9.
9.
PERFORM POWER BALANCE TEST
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode.
2. Check that each cylinder produces a momentary engine speed drop.
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 10.
10.
DETECT MALFUNCTIONING PART
1. Check the following below.
-
Ignition coil and its circuit (Refer to
-
Fuel injector and its circuit (Refer to
-
Intake air leakage
-
Low compression pressure (Refer to
EM-159, "Compression Pressure"
2. If NG, repair or replace the malfunctioning part.
If OK, replace malfunctioning fuel injector. (It may be caused by leakage from fuel injector or clogging.)
>> GO TO 11.
11.
CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start engine.
2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each
indication is within the SP value.
OK or NG
OK
>>
INSPECTION END
NG
>> GO TO 12.
12.
CHECK A/F SENSOR 1 FUNCTION
Perform all DTC Confirmation Procedure related with A/F sensor 1.
• For DTC P0130, P0150, refer to
EC-630, "DTC Confirmation Procedure"
.
• For DTC P0131, P0151, refer to
EC-634, "DTC Confirmation Procedure"
.
• For DTC P0132, P0152, refer to
EC-638, "DTC Confirmation Procedure"
.
• For DTC P0133, P0153, refer to
EC-642, "DTC Confirmation Procedure"
.
• For DTC P2A00, P2A03, refer to
EC-861, "DTC Confirmation Procedure"
OK or NG
OK
>> GO TO 15.
NG
>> GO TO 13.
13.
CHECK A/F SENSOR 1 CIRCUIT
Perform Diagnostic Procedure according to corresponding DTC.
>> GO TO 14.
14.
CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start engine.
2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each
indication is within the SP value.
OK or NG
2010 Pathfinder
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-571
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OK
>>
INSPECTION END
NG
>> GO TO 15.
15.
DISCONNECT AND RECONNECT ECM HARNESS CONNECTOR
1. Stop the engine.
2. Disconnect ECM harness connector.
3. Check pin terminals and connector for damage, and then reconnect it.
>> GO TO 16.
16.
CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start engine.
2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each
indication is within the SP value.
OK or NG
OK
>>
INSPECTION END
NG
>> Detect malfunctioning part according to
EC-947, "Symptom Matrix Chart"
17.
CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and check that the indication is within the SP
value.
OK or NG
OK
>>
INSPECTION END
NG (More than the SP value)>>GO TO 18.
NG (Less than the SP value)>>GO TO 25.
18.
DETECT MALFUNCTIONING PART
1. Check for the cause of large engine friction. Refer to the following.
-
Engine oil level is too high
-
Engine oil viscosity
-
Belt tension of power steering, alternator, A/C compressor, etc. is excessive
-
Noise from engine
-
Noise from transmission, etc.
2. Check for the cause of insufficient combustion. Refer to the following.
-
Valve clearance malfunction
-
Intake valve timing control function malfunction
-
Camshaft sprocket installation malfunction, etc.
>> Repair or replace malfunctioning part, and then GO TO 30.
19.
CHECK INTAKE SYSTEM
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
• Crushed air ducts
• Malfunctioning seal of air cleaner element
• Uneven dirt of air cleaner element
• Improper specification of intake air system
OK or NG
OK
>> GO TO 21.
NG
>> Repair or replace malfunctioning part, and then GO TO 20.
20.
CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”, AND “B/FUEL SCHDL”
Select “A/F ALPHA-B1”, “A/F ALPHA-B2”, and “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and
check that each indication is within the SP value.
OK or NG
OK
>>
INSPECTION END
NG (“B/FUEL SCHDL” is more, “A/F ALPHA-B1”, “A/F ALPHA-B2” are less than the SP value)>>GO TO 21.
21.
DISCONNECT AND RECONNECT MASS AIR FLOW SENSOR HARNESS CONNECTOR
2010 Pathfinder
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