Nissan Pathfinder (2009 year). Instruction — part 256
EC-62
< FUNCTION DIAGNOSIS >
[VQ40DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EGR
SYSTEM
31H
EGR function
P0400
80H
96H
Low Flow Faults: EGR temp
change rate (short term)
P0400
81H
96H
Low Flow Faults: EGR temp
change rate (long term)
P0400
82H
96H
Low Flow Faults: Difference be-
tween max EGR temp and EGR
temp under idling condition
P0400
83H
96H
Low Flow Faults: Max EGR temp
P1402
84H
96H
High Flow Faults: EGR temp in-
crease rate
EVAP
SYSTEM
39H
EVAP control system leak
(Cap Off)
P0455
80H
0CH
Difference in pressure sensor out-
put voltage before and after pull
down
3BH
EVAP control system leak
(Small leak)
P0442
80H
05H
Leak area index (for more than
0.04inch)
3CH
EVAP control system leak
(Very small leak)
P0456
80H
05H
Leak area index (for more than
0.02inch)
P0456
81H
FDH
Maximum internal pressure of
EVAP system during monitoring
3DH
Purge flow system
P0441
83H
0CH
Difference in pressure sensor out-
put voltage before and after vent
control valve close
O2 SEN-
SOR
HEATER
41H
A/F sensor 1 heater
(Bank 1)
Low Input:P0031
High Input:P0032
81H
0BH
Converted value of Heater electric
current to voltage
42H
Heated oxygen sensor 2 heat-
er (Bank 1)
Low Input:P0037
High Input:P0038
80H
0CH
Converted value of Heater electric
current to voltage
43H
Heated oxygen sensor 3 heat-
er (Bank 1)
P0043
80H
0CH
Converted value of Heater electric
current to voltage
45H
A/F sensor 1 heater
(Bank 2)
Low Input:P0051
High Input:P0052
81H
0BH
Converted value of Heater electric
current to voltage
46H
Heated oxygen sensor 2 heat-
er (Bank 2)
Low Input:P0057
High Input:P0058
80H
0CH
Converted value of Heater electric
current to voltage
47H
Heated oxygen sensor 3 heat-
er (Bank 2)
P0063
80H
0CH
Converted value of Heater electric
current to voltage
SEC-
OND-
ARY AIR
71H
Secondary Air system
P0411
80H
01H
Secondary Air Injection System
Incorrect Flow Detected
Bank1: P0491
Bank2: P0492
81H
01H
Secondary Air Injection System
Insufficient Flow
P2445
82H
01H
Secondary Air Injection System
Pump Stuck Off
P2448
83H
01H
Secondary Air Injection System
High Airflow
Bank1: P2440
Bank2: P2442
84H
01H
Secondary Air Injection System
Switching Valve Stuck Open
P2440
85H
01H
Secondary Air Injection System
Switching Valve Stuck Open
P2444
86H
01H
Secondary Air Injection System
Pump Stuck On
Item
OBD-
MID
Self-diagnostic test item
DTC
Test value and Test
limit
(GST display)
Description
TID
Unit and
Scaling
ID
2009 Pathfinder
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-63
< FUNCTION DIAGNOSIS >
[VQ40DE]
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FUEL
SYSTEM
81H
Fuel injection system function
(Bank 1)
P0171 or P0172
80H
2FH
Long term fuel trim
P0171 or P0172
81H
24H
The number of lambda control
clamped
82H
Fuel injection system function
(Bank 2)
P0174 or P0175
80H
2FH
Long term fuel trim
P0174 or P0175
81H
24H
The number of lambda control
clamped
MISFIRE
A1H
Multiple Cylinder Misfire
P0301
80H
24H
Misfiring counter at 1000 revolu-
tion of the first cylinder
P0302
81H
24H
Misfiring counter at 1000 revolu-
tion of the second cylinder
P0303
82H
24H
Misfiring counter at 1000 revolu-
tion of the third cylinder
P0304
83H
24H
Misfiring counter at 1000 revolu-
tion of the fourth cylinder
P0305
84H
24H
Misfiring counter at 1000 revolu-
tion of the fifth cylinder
P0306
85H
24H
Misfiring counter at 1000 revolu-
tion of the sixth cylinder
P0307
86H
24H
Misfiring counter at 1000 revolu-
tion of the seventh cylinder
P0308
87H
24H
Misfiring counter at 1000 revolu-
tion of the eighth cylinder
P0300
88H
24H
Misfiring counter at 1000 revolu-
tion of the multiple cylinders
P0301
89H
24H
Misfiring counter at 200 revolution
of the first cylinder
P0302
8AH
24H
Misfiring counter at 200 revolution
of the second cylinder
P0303
8BH
24H
Misfiring counter at 200 revolution
of the third cylinder
P0304
8CH
24H
Misfiring counter at 200 revolution
of the fourth cylinder
P0305
8DH
24H
Misfiring counter at 200 revolution
of the fifth cylinder
P0306
8EH
24H
Misfiring counter at 200 revolution
of the sixth cylinder
P0307
8FH
24H
Misfiring counter at 200 revolution
of the seventh cylinder
P0308
90H
24H
Misfiring counter at 200 revolution
of the eightth cylinder
P0300
91H
24H
Misfiring counter at 1000 revolu-
tion of the single cylinder
P0300
92H
24H
Misfiring counter at 200 revolution
of the single cylinder
P0300
93H
24H
Misfiring counter at 200 revolution
of the multiple cylinders
Item
OBD-
MID
Self-diagnostic test item
DTC
Test value and Test
limit
(GST display)
Description
TID
Unit and
Scaling
ID
2009 Pathfinder
EC-64
< FUNCTION DIAGNOSIS >
[VQ40DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION
How to Erase DTC
With CONSULT-III
The emission related diagnostic information in the ECM can be erased by selecting “ALL Erase” in the
“Description” of “FINAL CHECK” mode with CONSULT-III.
With GST
The emission related diagnostic information in the ECM can be erased by selecting Service $04 with GST.
1.
If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10
seconds and then turn it ON (engine stopped) again.
2.
TM-34, "OBD-II Diagnostic Trouble Code (DTC)"
. (The DTC in TCM will be erased.)
MISFIRE
A2H
No.1 Cylinder Misfire
P0301
0BH
24H
EWMA (Exponential Weighted
Moving Average) misfire counts
for last 10 driving cycles
P0301
0CH
24H
Misfire counts for last/current driv-
ing cycles
A3H
No.2 Cylinder Misfire
P0302
0BH
24H
EWMA (Exponential Weighted
Moving Average) misfire counts
for last 10 driving cycles
P0302
0CH
24H
Misfire counts for last/current driv-
ing cycles
A4H
No.3 Cylinder Misfire
P0303
0BH
24H
EWMA (Exponential Weighted
Moving Average) misfire counts
for last 10 driving cycles
P0303
0CH
24H
Misfire counts for last/current driv-
ing cycles
A5H
No.4 Cylinder Misfire
P0304
0BH
24H
EWMA (Exponential Weighted
Moving Average) misfire counts
for last 10 driving cycles
P0304
0CH
24H
Misfire counts for last/current driv-
ing cycles
A6H
No.5 Cylinder Misfire
P0305
0BH
24H
EWMA (Exponential Weighted
Moving Average) misfire counts
for last 10 driving cycles
P0305
0CH
24H
Misfire counts for last/current driv-
ing cycles
A7H
No.6 Cylinder Misfire
P0306
0BH
24H
EWMA (Exponential Weighted
Moving Average) misfire counts
for last 10 driving cycles
P0306
0CH
24H
Misfire counts for last/current driv-
ing cycles
A8H
No.7 Cylinder Misfire
P0307
0BH
24H
EWMA (Exponential Weighted
Moving Average) misfire counts
for last 10 driving cycles
P0307
0CH
24H
Misfire counts for last/current driv-
ing cycles
A9H
No.8 Cylinder Misfire
P0308
0BH
24H
EWMA (Exponential Weighted
Moving Average) misfire counts
for last 10 driving cycles
P0308
0CH
24H
Misfire counts for last/current driv-
ing cycles
Item
OBD-
MID
Self-diagnostic test item
DTC
Test value and Test
limit
(GST display)
Description
TID
Unit and
Scaling
ID
2009 Pathfinder
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-65
< FUNCTION DIAGNOSIS >
[VQ40DE]
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3.
Select Service $04 with GST (Generic Scan Tool).
No Tools
1.
If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once.
Wait at least 10 seconds and then turn it ON (engine stopped) again.
2.
TM-34, "OBD-II Diagnostic Trouble Code (DTC)"
. (The DTC in TCM will be erased.)
3.
Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal. Refer to
EC-65, "Malfunction Indicator Lamp (MIL)"
• If the battery is disconnected, the emission-related diagnostic information will be lost within 24
hours.
• The following data are cleared when the ECM memory is erased.
- Diagnostic trouble codes
- 1st trip diagnostic trouble codes
- Freeze frame data
- 1st trip freeze frame data
- System readiness test (SRT) codes
- Test values
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but all
of the data listed above, are cleared from the ECM memory during work procedures.
Malfunction Indicator Lamp (MIL)
INFOID:0000000004297259
DESCRIPTION
The MIL is located on the instrument panel.
1.
The MIL will illuminate when the ignition switch is turned ON
without the engine running. This is a bulb check.
If the MIL does not illuminate, refer to
2.
When the engine is started, the MIL should turn off.
If the MIL remains on, the on board diagnostic system has
detected an engine system malfunction.
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following three functions.
SEF217U
2009 Pathfinder
EC-66
< FUNCTION DIAGNOSIS >
[VQ40DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
When there is an open circuit on MIL circuit, the ECM cannot warn the driver by illuminating MIL when there is
malfunction on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected as
NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by means
of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands the
driver to repair the malfunction.
MIL blinking Without DTC
When any SRT codes are not set, MIL may blink without DTC. For the details, refer to
.
HOW TO SWITCH DIAGNOSTIC TEST MODE
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.
• ECM always returns to Diagnostic Test Mode I after the ignition switch is turned OFF.
How to Set Diagnostic Test Mode II (Self-diagnostic Results)
1.
Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
2.
Repeat the following procedure quickly five times within 5 seconds.
a.
Fully depress the accelerator pedal.
b.
Fully release the accelerator pedal.
3.
Wait 7 seconds, fully depress the accelerator pedal and keep it depressed for approx. 10 seconds until the
MIL starts blinking.
NOTE:
Do not release the accelerator pedal for 10 seconds if MIL starts blinking during this period. This
blinking is displaying SRT status and is continued for another 10 seconds. For the details, refer to
.
Diagnostic Test
Mode
KEY and ENG.
Status
Function
Explanation of Function
Mode I
Ignition switch in
ON position
Engine stopped
BULB CHECK
This function checks the MIL bulb for damage (blown, open
circuit, etc.).
If the MIL does not come on, check MIL circuit.
Engine running
MALFUNCTION
WARNING
When a malfunction is detected twice in two consecutive
driving cycles (two trip detection logic), the MIL will illumi-
nate to inform the driver that a malfunction has been detect-
ed.
The following malfunctions will illuminate or blink the MIL in
the 1st trip.
• Misfire (Possible three way catalyst damage)
• One trip detection diagnoses
Mode II
Ignition switch in
ON position
Engine stopped
SELF-DIAGNOSTIC
RESULTS
This function allows DTCs and 1st trip DTCs to be read.
Engine operating condition in fail-safe mode
Engine speed will not rise more than 2,500 rpm due to the fuel cut
2009 Pathfinder
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-67
< FUNCTION DIAGNOSIS >
[VQ40DE]
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4.
Fully release the accelerator pedal.
ECM has entered to Diagnostic Test Mode II (Self-diagnostic results).
NOTE:
Wait until the same DTC (or 1st trip DTC) appears to completely confirm all DTCs.
How to Erase Diagnostic Test Mode II (Self-diagnostic Results)
1.
Set ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to "How to Set Diagnostic Test Mode II
(Self-diagnostic Results)".
2.
Fully depress the accelerator pedal and keep it depressed for more than 10 seconds.
The emission-related diagnostic information has been erased from the backup memory in the ECM.
3.
Fully release the accelerator pedal, and confirm the DTC 0000 is displayed.
DIAGNOSTIC TEST MODE I — BULB CHECK
In this mode, the MIL on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to
DIAGNOSTIC TEST MODE I — MALFUNCTION WARNING
This DTC number is clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS)
DIAGNOSTIC TEST MODE II — SELF-DIAGNOSTIC RESULTS
In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MIL as shown below.
The DTC and 1st trip DTC are displayed at the same time. If the MIL does not illuminate in diagnostic test
mode I (Malfunction warning), all displayed items are 1st trip DTCs. If only one code is displayed when the MIL
illuminates in diagnostic test mode II (SELF-DIAGNOSTIC RESULTS), it is a DTC; if two or more codes are
displayed, they may be either DTCs or 1st trip DTCs. DTC No. is same as that of 1st trip DTC. These uniden-
PBIB0092E
MIL
Condition
ON
When the malfunction is detected.
OFF
No malfunction.
2009 Pathfinder
EC-68
< FUNCTION DIAGNOSIS >
[VQ40DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
tified codes can be identified by using the CONSULT-III or GST. A DTC will be used as an example for how to
read a code.
A particular trouble code can be identified by the number of four-digit numeral blinks. The “zero” is indicated by
the number of ten blinks. The “A” is indicated by the number of eleven blink. The length of time the 1,000th-
digit numeral blinks on and off is 1.2 seconds consisting of an ON (0.6-seconds) - OFF (0.6-seconds) cycle.
The 100th-digit numeral and lower digit numerals consist of a 0.3-seconds ON and 0.3-seconds OFF cycle.
A change from one digit numeral to another occurs at an interval of 1.0-second OFF. In other words, the later
numeral appears on the display 1.3 seconds after the former numeral has disappeared.
A change from one trouble code to another occurs at an interval of 1.8-seconds OFF.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC 0000 refers to no mal-
function. (See
How to Erase Diagnostic Test Mode II (Self-diagnostic Results)
The DTC can be erased from the back up memory in the ECM by depressing accelerator pedal. Refer to "How
to Set Diagnostic Test Mode II (Self-diagnostic Results)".
• If the battery is disconnected, the DTC will be lost from the backup memory within 24 hours.
• Be careful not to erase the saved memory before starting trouble diagnoses.
OBD System Operation Chart
INFOID:0000000004297260
RELATIONSHIP BETWEEN MIL, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS
• When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data are
saved in the ECM memory.
• When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are
saved in the ECM memory, and the MIL will come on. For details, refer to
EC-52, "Two Trip Detection Logic"
.
• The MIL will turn off after the vehicle is driven 3 times with no malfunction. A drive is counted only when the
recorded driving pattern is met (as saved in the ECM). If another malfunction occurs while counting, the
counter will reset.
• The DTC and the freeze frame data will be saved until the vehicle is driven 40 times (driving pattern A) with-
out the same malfunction recurring (except for Misfire and Fuel Injection System). For Misfire and Fuel Injec-
tion System, the DTC and freeze frame data will be saved until the vehicle is driven 80 times (driving pattern
PBIB3005E
2009 Pathfinder
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-69
< FUNCTION DIAGNOSIS >
[VQ40DE]
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C) without the same malfunction recurring. The “TIME” in “SELF-DIAGNOSTIC RESULTS” mode of CON-
SULT-III will count the number of times the vehicle is driven.
• The 1st trip DTC is not displayed when the self-diagnosis results in OK for the 2nd trip.
SUMMARY CHART
For details about patterns B and C under “Fuel Injection System” and “Misfire”, see "EXPLANATION FOR DRIVING PATTERNS FOR
“MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”".
For details about patterns A and B under Other, see "EXPLANATION FOR DRIVING PATTERNS FOR “MISFIRE <EXHAUST QUALITY
DETERIORATION>”, “FUEL INJECTION SYSTEM”".
*1: Clear timing is at the moment OK is detected.
*2: Clear timing is when the same malfunction is detected in the 2nd trip.
RELATIONSHIP BETWEEN MIL, DTC, 1ST TRIP DTC AND DRIVING PATTERNS FOR “MISFIRE ”
<EXHAUST QUALITY DETERIORATION>, “FUEL INJECTION SYSTEM”
Items
Fuel Injection System
Misfire
Other
MIL (turns off)
3 (pattern B)
3 (pattern B)
3 (pattern B)
DTC, Freeze Frame Data (no
display)
80 (pattern C)
80 (pattern C)
40 (pattern A)
1st Trip DTC (clear)
1 (pattern C), *1
1 (pattern C), *1
1 (pattern B)
1st Trip Freeze Frame Data
(clear)
*1, *2
*1, *2
1 (pattern B)
2009 Pathfinder
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