Nissan Pathfinder (2007 year). Manual — part 149
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-59
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Item
Self-diagnostic test item
DTC
Test value
(GST display)
Test limit
Conversion
TID
CID
CATALYST
Three way catalyst function (Bank 1)
P0420
01H
01H
Max.
1/128
P0420
02H
81H
Min.
1
Three way catalyst function (Bank 2)
P0430
03H
02H
Max.
1/128
P0430
04H
82H
Min.
1
EVAP SYSTEM
EVAP control system (Small leak)
P0442
05H
03H
Max.
1/128mm
2
EVAP control system purge flow monitoring
P0441
06H
83H
Min.
20mV
EVAP control system (Very small leak)
P0456
07H
03H
Max.
1/128mm
2
HO2S
Air fuel ratio (A/F) sensor 1 (Bank 1)
P0131
41H
8EH
Min.
5 mV
P0132
42H
0EH
Max.
5 mV
P2A00
43H
0EH
Max.
0.002
P0133
45H
8EH
Min.
0.004
P0130
46H
0EH
Max.
5 mV
P0130
46H
0EH
Max.
5 mV
P0133
48H
8EH
Min.
0.004
Air fuel ratio (A/F) sensor 1 (Bank 2)
P0151
4CH
8FH
Min.
5 mV
P0152
4DH
0FH
Max.
5 mV
P2A03
4EH
0FH
Max.
0.002
P0153
50H
8FH
Min.
0.004
P0150
51H
0FH
Max.
5 mV
P0150
51H
0FH
Max.
5 mV
P0153
53H
8FH
Min.
0.004
Heated oxygen sensor 2 (Bank 1)
P0139
19H
86H
Min.
10mV/500ms
P0137
1AH
86H
Min.
10mV
P1146
1BH
06H
Max.
10mV
P0138
1CH
06H
Max.
10mV
Heated oxygen sensor 2 (Bank 2)
P0159
21H
87H
Min.
10mV/500ms
P0157
22H
87H
Min.
10mV
P0158
24H
07H
Max.
10mV
HO2S HEATER
Air fuel ratio (A/F) sensor 1 heater (Bank 1)
P0032
57H
10H
Max.
5 mV
P0031
58H
90H
Min.
5 mV
Air fuel ratio (A/F) sensor 1 heater (Bank 2)
P0052
59H
11H
Max.
5 mV
P0051
5AH
91H
Min.
5 mV
Heated oxygen sensor 2 heater (Bank 1)
P0038
2DH
0AH
Max.
20mV
P0037
2EH
8AH
Min.
20mV
Heated oxygen sensor 2 heater (Bank 2)
P0058
2FH
0BH
Max.
20mV
P0057
30H
8BH
Min.
20mV
EC-60
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2007 Pathfinder
HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION
How to Erase DTC
With CONSULT-II
The emission related diagnostic information in the ECM can be erased by selecting “ERASE” in the “SELF-
DIAG RESULTS” mode with CONSULT-II.
If DTCs are displayed for both ECM and TCM (Transmission control module), they need to be erased individu-
ally from the ECM and TCM (Transmission control module).
NOTE:
If the DTC is not for A/T related items (see
), skip steps 2 through 4.
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.
Turn CONSULT-II ON and touch “A/T”.
3.
Touch “SELF-DIAG RESULTS”.
4.
Touch “ERASE”. [The DTC in the TCM (Transmission control module) will be erased.] Then touch “BACK”
twice.
5.
Touch “ENGINE”.
6.
Touch “SELF-DIAG RESULTS”.
7.
Touch “ERASE”. (The DTC in the ECM will be erased.)
With GST
The emission related diagnostic information in the ECM can be erased by selecting Service $04 with GST.
NOTE:
If the DTC is not for A/T related items (see
), skip step 2.
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.
SCIA5671E
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-61
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2.
Perform
AT-41, "HOW TO ERASE DTC (WITH GST)"
. (The DTC in TCM will be erased.)
3.
Select Service $04 with GST (Generic Scan Tool).
No Tools
NOTE:
If the DTC is not for A/T related items (see
), skip step 2.
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.
Perform
AT-42, "HOW TO ERASE DTC (NO TOOLS)"
. (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-62, "HOW TO SWITCH DIAGNOSTIC TEST MODE"
●
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)
UBS00K3T
DESCRIPTION
The MIL is located on the instrument panel.
1.
The MIL will light up when the ignition switch is turned ON with-
out the engine running. This is a bulb check.
If the MIL does not light up, refer to
or see
2.
When the engine is started, the MIL should go off.
If the MIL remains on, the on board diagnostic system has
detected an engine system malfunction.
SEF217U
EC-62
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2007 Pathfinder
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following three functions.
When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting up 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 Flashing Without DTC
When any SRT codes are not set, MIL may flash 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.
●
Always ECM returns to Diagnostic Test Mode I after 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 for approx. 10 seconds until the MIL starts
blinking.
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
This is a usual driving condition. When a malfunction is
detected twice in two consecutive driving cycles (two trip
detection logic), the MIL will light up to inform the driver
that a malfunction has been detected.
The following malfunctions will light up 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
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-63
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NOTE:
Do not release the accelerator pedal for 10 seconds if MIL may start blinking on the halfway of this
10 seconds. This blinking is displaying SRT status and is continued for another 10 seconds. For
the details, refer to
.
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 confirm all DTCs certainly.
How to Erase Diagnostic Test Mode II (Self-diagnostic Results)
1.
Set ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to
EC-62, "How to Set Diagnostic Test
Mode II (Self-diagnostic Results)"
.
2.
Fully depress the accelerator pedal and keep it 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
or see
.
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.
EC-64
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2007 Pathfinder
tified codes can be identified by using the CONSULT-II 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 flashes. The “zero” is indicated
by the number of ten flashes. The “A” is indicated by the number of eleven flash. The length of time the
1,000th-digit numeral flashes on and off is 1.2 seconds consisting of an ON (0.6-second) - OFF (0.6-second)
cycle.
The 100th-digit numeral and lower digit numerals consist of a 0.3-second ON and 0.3-second 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-second 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
62, "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 stored memory before starting trouble diagnoses.
OBD System Operation Chart
UBS00K3U
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
stored in the ECM memory.
●
When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are
stored in the ECM memory, and the MIL will come on. For details, refer to
PBIB3005E
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-65
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●
The MIL will go off after the vehicle is driven 3 times with no malfunction. The drive is counted only when
the recorded driving pattern is met (as stored in the ECM). If another malfunction occurs while counting,
the counter will reset.
●
The DTC and the freeze frame data will be stored until the vehicle is driven 40 times (driving pattern A)
without the same malfunction recurring (except for Misfire and Fuel Injection System). For Misfire and
Fuel Injection System, the DTC and freeze frame data will be stored until the vehicle is driven 80 times
(driving pattern C) without the same malfunction recurring. The “TIME” in “SELF-DIAGNOSTIC
RESULTS” mode of CONSULT-II 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
For details about patterns A and B under Other, see
*1: Clear timing is at the moment OK is detected.
*2: Clear timing is when the same malfunction is detected in the 2nd trip.
Items
Fuel Injection System
Misfire
Other
MIL (goes 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)
EC-66
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2007 Pathfinder
RELATIONSHIP BETWEEN MIL, DTC, 1ST TRIP DTC AND DRIVING PATTERNS FOR “MISFIRE
” <EXHAUST QUALITY DETERIORATION>, “FUEL INJECTION SYSTEM”
*1: When the same malfunction is
detected in two consecutive trips,
MIL will light up.
*2: MIL will go off after vehicle is driven
3 times (pattern B) without any mal-
functions.
*3: When the same malfunction is
detected in two consecutive trips, the
DTC and the freeze frame data will
be stored in ECM.
*4: The DTC and the freeze frame data
will not be displayed any longer after
vehicle is driven 80 times (pattern C)
without the same malfunction. (The
DTC and the freeze frame data still
remain in ECM.)
*5: When a malfunction is detected for
the first time, the 1st trip DTC and
the 1st trip freeze frame data will be
stored in ECM.
*6: The 1st trip DTC and the 1st trip
freeze frame data will be cleared at
the moment OK is detected.
*7: When the same malfunction is
detected in the 2nd trip, the 1st trip
freeze frame data will be cleared.
*8: 1st trip DTC will be cleared when
vehicle is driven once (pattern C)
without the same malfunction after
DTC is stored in ECM.
SEF392S
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