Nissan Pathfinder (2009 year). Instruction — part 258
EC-78
< FUNCTION DIAGNOSIS >
[VQ40DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
FUEL T/TMP SE
°
C or
°
F
• The fuel temperature (determined by the signal
voltage of the fuel tank temperature sensor) is dis-
played.
INT/A TEMP SE
°
C or
°
F
• The intake air temperature (determined by the sig-
nal voltage of the intake air temperature sensor) is
indicated.
EVAP SYS PRES
V
FUEL LEVEL SE
V
START SIGNAL
ON/OFF
• Indicates start signal status [ON/OFF] computed by
the ECM according to the signals of engine speed
and battery voltage.
• After starting the engine, [OFF] is dis-
played regardless of the starter signal.
CLSD THL POS
ON/OFF
• Indicates idle position [ON/OFF] computed by ECM
according to the accelerator pedal position sensor
signal.
AIR COND SIG
ON/OFF
• Indicates [ON/OFF] condition of the air conditioner
switch as determined by the air conditioner signal.
P/N POSI SW
ON/OFF
• Indicates [ON/OFF] condition from the park/neutral
position (PNP) switch signal.
PW/ST SIGNAL
ON/OFF
• [ON/OFF] condition of the power steering system
(determined by the signal voltage of the power
steering pressure sensor signal) is indicated.
LOAD SIGNAL
ON/OFF
• Indicates [ON/OFF] condition from the electrical
load signal.
ON: Rear window defogger switch is ON and/or
lighting switch is in 2nd position.
OFF: Both rear window defogger switch and light-
ing switch are OFF.
IGNITION SW
ON/OFF
• Indicates [ON/OFF] condition from ignition switch
signal.
HEATER FAN SW
ON/OFF
• Indicates [ON/OFF] condition from the heater fan
switch signal.
BRAKE SW
ON/OFF
• Indicates [ON/OFF] condition from the stop lamp
switch signal.
INJ PULSE-B1
msec
• Indicates the actual fuel injection pulse width com-
pensated by ECM according to the input signals.
• When the engine is stopped, a certain
computed value is indicated.
INJ PULSE-B2
msec
IGN TIMING
BTDC
• Indicates the ignition timing computed by ECM ac-
cording to the input signals.
• When the engine is stopped, a certain
value is indicated.
CAL/LD VALUE
%
• Calculated load value indicates the value of the
current air flow divided by peak air flow.
MASS AIRFLOW
g·m/s
• Indicates the mass air flow computed by ECM ac-
cording to the signal voltage of the mass air flow
sensor.
PURG VOL C/V
%
• Indicates the EVAP canister purge volume control
solenoid valve control value computed by the ECM
according to the input signals.
• The opening becomes larger as the value increas-
es.
INT/V TIM (B1)
°
CA
• Indicates [
°
CA] of intake camshaft advanced angle.
INT/V TIM (B2)
°
°
CA
INT/V SOL (B1)
%
• The control condition of the intake valve timing con-
trol solenoid valve (determined by ECM according
to the input signals) is indicated.
• The advance angle becomes larger as the value in-
creases.
INT/V SOL (B2)
%
Monitored item
Unit
Description
Remarks
2009 Pathfinder
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-79
< FUNCTION DIAGNOSIS >
[VQ40DE]
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VIAS S/V-1
ON/OFF
• The control condition of the VIAS control solenoid
valve (determined by ECM according to the input
signals) is indicated.
ON: VIAS control solenoid valve is operating.
OFF: VIAS control solenoid valve is not operating.
AIR COND RLY
ON/OFF
• The air conditioner relay control condition (deter-
mined by ECM according to the input signals) is in-
dicated.
FUEL PUMP RLY
ON/OFF
• Indicates the fuel pump relay control condition de-
termined by ECM according to the input signals.
VENT CONT/V
ON/OFF
• The control condition of the EVAP canister vent
control valve (determined by ECM according to the
input signals) is indicated.
ON: Closed
OFF: Open
THRTL RELAY
ON/OFF
• Indicates the throttle control motor relay control
condition determined by the ECM according to the
input signals.
COOLING FAN
HI/LOW/
OFF
• The control condition of the cooling fan (deter-
mined by ECM according to the input signals) is in-
dicated.
HI: High speed operation
LOW: Low speed operation
OFF: Stop
HO2S2 HTR (B1)
ON/OFF
• Indicates [ON/OFF] condition of heated oxygen
sensor 2 heater determined by ECM according to
the input signals.
HO2S2 HTR (B2)
ON/OFF
I/P PULLY SPD
rpm
• Indicates the engine speed computed from the tur-
bine revolution sensor signal.
VEHICLE SPEED
km/h or
mph
• Indicates the vehicle speed computed from the rev-
olution sensor signal.
IDL A/V LEARN
YET/
CMPLT
• Displays the condition of idle air volume learning
YET: Idle air volume learning has not been per-
formed yet.
CMPLT: Idle air volume learning has already been
performed successfully.
TRVL AFTER MIL
km or
mile
• Distance traveled while MIL is activated.
A/F S1 HTR (B1)
%
• Air fuel ratio (A/F) sensor 1 heater control value
computed by ECM according to the input signals.
• The current flow to the heater becomes larger as
the value increases.
A/F S1 HTR (B2)
%
AC PRESS SEN
V
• The signal voltage from the refrigerant pressure
sensor is displayed.
VHCL SPEED SE
km/h or
mph
• The vehicle speed computed from the vehicle
speed signal sent from TCM is displayed.
SET VHCL SPD
km/h or
mph
• The preset vehicle speed is displayed.
MAIN SW
ON/OFF
• Indicates [ON/OFF] condition from MAIN switch
signal.
CANCEL SW
ON/OFF
• Indicates [ON/OFF] condition from CANCEL switch
signal.
RESUME/ACC SW
ON/OFF
• Indicates [ON/OFF] condition from RESUME/AC-
CELERATE switch signal.
SET SW
ON/OFF
• Indicates [ON/OFF] condition from SET/COAST
switch signal.
Monitored item
Unit
Description
Remarks
2009 Pathfinder
EC-80
< FUNCTION DIAGNOSIS >
[VQ40DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test Item
BRAKE SW1
ON/OFF
• Indicates [ON/OFF] condition from ASCD brake
switch signal.
BRAKE SW2
ON/OFF
• Indicates [ON/OFF] condition of stop lamp switch
signal.
VHCL SPD CUT
NON/
CUT
• Indicates the vehicle cruise condition.
NON: Vehicle speed is maintained at the ASCD set
speed.
CUT: Vehicle speed increased to excessively high
compared with the ASCD set speed, and ASCD op-
eration is cut off.
LO SPEED CUT
NON/
CUT
• Indicates the vehicle cruise condition.
NON: Vehicle speed is maintained at the ASCD set
speed.
CUT: Vehicle speed decreased to excessively low
compared with the ASCD set speed, and ASCD op-
eration is cut off.
AT OD MONITOR
ON/OFF
• Indicates [ON/OFF] condition of A/T O/D according
to the input signal from the TCM.
AT OD CANCEL
ON/OFF
• Indicates [ON/OFF] condition of A/T O/D cancel
signal sent from the TCM.
CRUISE LAMP
ON/OFF
• Indicates [ON/OFF] condition of CRUISE lamp de-
termined by the ECM according to the input sig-
nals.
SET LAMP
ON/OFF
• Indicates [ON/OFF] condition of SET lamp deter-
mined by the ECM according to the input signals.
ALT DUTY
%
• Indicates the duty ratio of the power generation
command value. The ratio is calculated by ECM
based on the battery current sensor signal.
BAT CUR SEN
mV
• The signal voltage of battery current sensor is dis-
played.
ALT DUTY SIG
ON/OFF
• The control condition of the power generation volt-
age variable control (determined by ECM accord-
ing to the input signals) is indicated.
ON: Power generation voltage variable control is
active
OFF: Power generation voltage variable control is
inactive.
A/F ADJ-B1
—
• Indicates the correction factor saved in ECM. The
factor is calculated from the difference between the
target air-fuel ratio saved in ECM and the air-fuel
ratio calculated from A/F sensor 1 signal.
A/F ADJ-B2
—
Monitored item
Unit
Description
Remarks
TEST ITEM
CONDITION
JUDGEMENT
CHECK ITEM (REMEDY)
FUEL INJEC-
TION
• Engine: Return to the original
non-standard condition
• Change the amount of fuel injec-
tion using CONSULT-III.
If malfunctioning symptom disap-
pears, see CHECK ITEM.
• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1
IGNITION TIM-
ING
• Engine: Return to the original
non-standard condition
• Timing light: Set
• Retard the ignition timing using
CONSULT-III.
If malfunctioning symptom disap-
pears, see CHECK ITEM.
• Perform Idle Air Volume Learning.
2009 Pathfinder
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-81
< FUNCTION DIAGNOSIS >
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*: Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.
DTC & SRT CONFIRMATION MODE
SRT STATUS Mode
For details, refer to
EC-53, "Emission-related Diagnostic Information"
SRT Work Support Mode
This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.
DTC Work Support Mode
POWER BAL-
ANCE
• Engine: After warming up, idle the
engine.
• A/C switch: OFF
• Shift lever: P or N
• Cut off each fuel injector signal
one at a time using CONSULT-III.
Engine runs rough or stops.
• Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil
COOLING FAN*
• Ignition switch: ON
• Turn the cooling fan HI, LOW and
OFF using CONSULT-III.
Cooling fan moves and stops.
• Harness and connectors
• Cooling fan motor
• IPDM E/R
ENG COOLANT
TEMP
• Engine: Return to the original
non-standard condition
• Change the engine coolant tem-
perature using CONSULT-III.
If malfunctioning symptom disap-
pears, see CHECK ITEM.
• Harness and connectors
• Engine coolant temperature sen-
sor
• Fuel injector
FUEL PUMP RE-
LAY
• Ignition switch: ON (Engine
stopped)
• Turn the fuel pump relay ON and
OFF using CONSULT-III and lis-
ten to operating sound.
Fuel pump relay makes the operat-
ing sound.
• Harness and connectors
• Fuel pump relay
VIAS SOL VALVE
• Ignition switch: ON
• Turn solenoid valve ON and OFF
with CONSULT-III and listen for
operating sound.
Solenoid valve makes an operating
sound.
• Harness and connectors
• Solenoid valve
PURG VOL
CONT/V
• Engine: After warming up, run en-
gine at 1,500 rpm.
• Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-III.
Engine speed changes according to
the opening percent.
• Harness and connectors
• Solenoid valve
FUEL/T TEMP
SEN
• Change the fuel tank temperature using CONSULT-III.
VENT CON-
TROL/V
• Ignition switch: ON (Engine
stopped)
• Turn solenoid valve ON and OFF
with the CONSULT-III and listen
to operating sound.
Solenoid valve makes an operating
sound.
• Harness and connectors
• Solenoid valve
V/T ASSIGN AN-
GLE
• Engine: Return to the original
non-standard condition
• Change intake valve timing using
CONSULT-III.
If malfunctioning symptom disap-
pears, see CHECK ITEM.
• Harness and connectors
• Intake valve timing control sole-
noid valve
ALTERNATOR
DUTY
• Engine: Idle
• Change duty ratio using CON-
SULT-III.
Battery voltage changes.
• Harness and connectors
• IPDM E/R
• Alternator
TEST ITEM
CONDITION
JUDGEMENT
CHECK ITEM (REMEDY)
2009 Pathfinder
EC-82
< FUNCTION DIAGNOSIS >
[VQ40DE]
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:0000000004297262
DESCRIPTION
Generic Scan Tool (OBDII scan tool) complying with SAE J1978 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 SYS-
TEM
EVP SML LEAK P0442/P1442*
P0442
P0455
EVP V/S LEAK P0456/P1456*
P0456
PURG VOL CN/V P1444
P0443
PURG FLOW P0441
P0441
A/F SEN1
A/F SEN1 (B1) P1278/P1279
P0133
A/F SEN1 (B1) P1276
P0130
A/F SEN1 (B2) P1288/P1289
P0153
A/F SEN1 (B2) P1286
P0150
HO2S2
HO2S2 (B1) P1146
P0138
HO2S2 (B1) P1147
P0137
HO2S2 (B1) P0139
P0139
HO2S2 (B2) P1166
P0158
HO2S2 (B2) P1167
P0157
HO2S2 (B2) P0159
P0159
SEF139P
Diagnostic test mode
Function
Service $01
READINESS TESTS
This diagnostic service gains access to current emission-related data values, including an-
alog 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 that were saved by
ECM during the freeze frame. For details, refer to
EC-53, "Emission-related Diagnostic In-
.
Service $03
DTCs
This diagnostic service gains access to emission-related power train trouble codes which
were saved by ECM.
Service $04
CLEAR DIAG INFO
This diagnostic service can clear all emission-related diagnostic information. This in-
cludes:
• 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.
2009 Pathfinder
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-83
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INSPECTION PROCEDURE
1.
Turn ignition switch OFF.
2.
Connect GST to data link connector, which is located under LH
dash panel near the hood opener handle.
3.
Turn ignition switch ON.
4.
Enter the program according to instruction on the screen or in
the operation instruction.
(*: Regarding GST screens in this section, sample screens are
shown.)
5.
Perform each diagnostic mode according to each service proce-
dure.
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-
related 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 infor-
mation such as Vehicle Identification Number (VIN) and Calibration IDs.
Diagnostic test mode
Function
BBIA0538E
SEF398S
SEF416S
2009 Pathfinder
EC-84
< COMPONENT DIAGNOSIS >
[VQ40DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
COMPONENT DIAGNOSIS
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Description
INFOID:0000000004297263
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 “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:0000000004297264
• 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)
• Transmission: Warmed-up*
1
• Electrical load: Not applied*
2
• Engine speed: Idle
*1: After the engine is warmed up to normal operating temperature, drive vehicle until “FLUID TEMP SE” (A/T
fluid temperature sensor signal) indicates more than 60
°
C (140
°
F).
*2: Rear window defogger switch, air conditioner switch lighting switch are OFF. Steering wheel is straight
ahead.
Inspection Procedure
INFOID:0000000004297265
NOTE:
Perform “SPEC” of “DATA MONITOR” mode in maximum scale display.
1.
2.
Confirm 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.
Make sure that monitor items are within the SP value.
5.
If NG, go to
.
Diagnosis Procedure
INFOID:0000000004297266
OVERALL SEQUENCE
2009 Pathfinder
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
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JMBIA1468GB
2009 Pathfinder
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