Nissan Pathfinder (2008 year). Manual — part 292
ECM
EC-453
< ECU DIAGNOSIS >
[VQ40DE]
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DTC Index
INFOID:0000000001366435
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
×
: Applicable
—: Not applicable
Items
(CONSULT-III screen terms)
DTC*
1
SRT code
Trip
MIL
Reference
page
CONSULT-III
GST*
2
ECM*
3
CAN COMM CIRCUIT
U1000
1000*
5
—
1
×
CAN COMM CIRCUIT
U1001
1001*
5
—
2
—
CONTROL UNIT (CAN)
U1010
1010
—
1
×
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.
P0000
0000
—
—
Flashing*
7
INT/V TIM CONT-B1
P0011
0011
—
2
×
INT/V TIM CONT-B2
P0021
0021
—
2
×
A/F SEN1 HTR (B1)
P0031
0031
—
2
×
A/F SEN1 HTR (B1)
P0032
0032
—
2
×
HO2S2 HTR (B1)
P0037
0037
—
2
×
HO2S2 HTR (B1)
P0038
0038
—
2
×
A/F SEN1 HTR (B2)
P0051
0051
—
2
×
A/F SEN1 HTR (B2)
P0052
0052
—
2
×
HO2S2 HTR (B2)
P0057
0057
—
2
×
HO2S2 HTR (B2)
P0058
0058
—
2
×
INT/V TIM V/CIR-B1
P0075
0075
—
2
×
INT/V TIM V/CIR-B2
P0081
0081
—
2
×
MAF SEN/CIRCUIT-B1
P0101
0101
—
2
×
MAF SEN/CIRCUIT-B1
P0102
0102
—
1
×
MAF SEN/CIRCUIT-B1
P0103
0103
—
1
×
IAT SEN/CIRCUIT-B1
P0112
0112
—
2
×
IAT SEN/CIRCUIT-B1
P0113
0113
—
2
×
ECT SEN/CIRC
P0117
0117
—
1
×
ECT SEN/CIRC
P0118
0118
—
1
×
TP SEN 2/CIRC-B1
P0122
0122
—
1
×
TP SEN 2/CIRC-B1
P0123
0123
—
1
×
ECT SENSOR
P0125
0125
—
2
×
IAT SENSOR-B1
P0127
0127
—
2
×
THERMSTAT FNCTN
P0128
0128
—
2
×
A/F SENSOR1 (B1)
P0130
0130
—
2
×
A/F SENSOR1 (B1)
P0131
0131
—
2
×
A/F SENSOR1 (B1)
P0132
0132
—
2
×
A/F SENSOR1 (B1)
P0133
0133
×
2
×
HO2S2 (B1)
P0137
0137
×
2
×
HO2S2 (B1)
P0138
0138
×
2
×
HO2S2 (B1)
P0139
0139
×
2
×
A/F SENSOR1 (B2)
P0150
0150
—
2
×
A/F SENSOR1 (B2)
P0151
0151
—
2
×
EC-454
< ECU DIAGNOSIS >
[VQ40DE]
ECM
A/F SENSOR1 (B2)
P0152
0152
—
2
×
A/F SENSOR1 (B2)
P0153
0153
×
2
×
HO2S2 (B2)
P0157
0157
×
2
×
HO2S2 (B2)
P0158
0158
×
2
×
HO2S2 (B2)
P0159
0159
×
2
×
FUEL SYS-LEAN-B1
P0171
0171
—
2
×
FUEL SYS-RICH-B1
P0172
0172
—
2
×
FUEL SYS-LEAN-B2
P0174
0174
—
2
×
FUEL SYS-RICH-B2
P0175
0175
—
2
×
FTT SENSOR
P0181
0181
—
2
×
FTT SEN/CIRCUIT
P0182
0182
—
2
×
FTT SEN/CIRCUIT
P0183
0183
—
2
×
TP SEN 1/CIRC-B1
P0222
0222
—
1
×
TP SEN 1/CIRC-B1
P0223
0223
—
1
×
MULTI CYL MISFIRE
P0300
0300
—
2
×
CYL 1 MISFIRE
P0301
0301
—
2
×
CYL 2 MISFIRE
P0302
0302
—
2
×
CYL 3 MISFIRE
P0303
0303
—
2
×
CYL 4 MISFIRE
P0304
0304
—
2
×
CYL 5 MISFIRE
P0305
0305
—
2
×
CYL 6 MISFIRE
P0306
0306
—
2
×
KNOCK SEN/CIRC-B1
P0327
0327
—
2
—
KNOCK SEN/CIRC-B1
P0328
0328
—
2
—
KNOCK SEN/CIRC-B2
P0332
0332
—
2
—
KNOCK SEN/CIRC-B2
P0333
0333
—
2
—
CKP SEN/CIRCUIT
P0335
0335
—
2
×
CMP SEN/CIRC-B1
P0340
0340
—
2
×
CMP SEN/CIRC-B2
P0345
0345
—
2
×
TW CATALYST SYS-B1
P0420
0420
×
2
×
TW CATALYST SYS-B2
P0430
0430
×
2
×
EVAP PURG FLOW/MON
P0441
0441
×
2
×
EVAP SMALL LEAK
P0442
0442
×
2
×
PURG VOLUME CONT/V
P0443
0443
—
2
×
PURG VOLUME CONT/V
P0444
0444
—
2
×
PURG VOLUME CONT/V
P0445
0445
—
2
×
VENT CONTROL VALVE
P0447
0447
—
2
×
VENT CONTROL VALVE
P0448
0448
—
2
×
EVAP SYS PRES SEN
P0451
0451
—
2
×
EVAP SYS PRES SEN
P0452
0452
—
2
×
EVAP SYS PRES SEN
P0453
0453
—
2
×
EVAP GROSS LEAK
P0455
0455
—
2
×
EVAP VERY SML LEAK
P0456
0456
×
*
4
2
×
Items
(CONSULT-III screen terms)
DTC*
1
SRT code
Trip
MIL
Reference
page
CONSULT-III
GST*
2
ECM*
3
ECM
EC-455
< ECU DIAGNOSIS >
[VQ40DE]
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FUEL LEV SEN SLOSH
P0460
0460
—
2
×
FUEL LEVEL SENSOR
P0461
0461
—
2
×
FUEL LEVL SEN/CIRC
P0462
0462
—
2
×
FUEL LEVEL SEN/CIRC
P0463
0463
—
2
×
VEH SPEED SEN/CIRC*
6
P0500
0500
—
2
×
ISC SYSTEM
P0506
0506
—
2
×
ISC SYSTEM
P0507
0507
—
2
×
PW ST P SEN/CIRC
P0550
0550
—
2
—
ECM BACK UP/CIRCUIT
P0603
0603
—
2
×
ECM
P0605
0605
—
1 or 2
×
or —
SENSOR POWER/CIRCUIT
P0643
0643
—
1
×
TCM
P0700
0700
—
1
×
PNP SW/CIRC
P0705
0705
—
2
×
ATF TEMP SEN/CIRC
P0710
0710
—
2
×
TURBINE SENSOR
P0717
0717
—
2
×
VEH SPD SEN/CIR AT*
6
P0720
0720
—
2
×
A/T 1ST GR FNCTN
P0731
0731
—
2
×
A/T 2ND GR FNCTN
P0732
0732
—
2
×
A/T 3RD GR FNCTN
P0733
0733
—
2
×
A/T 4TH GR FNCTN
P0734
0734
—
2
×
A/T 5TH GR FNCTN
P0735
0735
—
2
×
TCC SOLENOID/CIRC
P0740
0740
—
2
×
A/T TCC S/V FNCTN
P0744
0744
—
2
×
L/PRESS SOL/CIRC
P0745
0745
—
2
×
P-N POS SW/CIRCUIT
P0850
0850
—
2
×
CLOSED LOOP-B1
P1148
1148
—
1
×
CLOSED LOOP-B2
P1168
1168
—
1
×
TCS C/U FUNCTN
P1211
1211
—
2
—
TCS/CIRC
P1212
1212
—
2
—
ENG OVER TEMP
P1217
1217
—
1
×
CTP LEARNING-B1
P1225
1225
—
2
—
CTP LEARNING-B1
P1226
1226
—
2
—
COLD START CONTROL
P1421
1421
—
2
×
BAT CURRENT SENSOR
P1550
1550
—
2
—
BAT CURRENT SENSOR
P1551
1551
—
2
—
BAT CURRENT SENSOR
P1552
1552
—
2
—
BAT CURRENT SENSOR
P1553
1553
—
2
—
BAT CURRENT SENSOR
P1554
1554
—
2
—
ASCD SW
P1564
1564
—
1
—
ASCD BRAKE SW
P1572
1572
—
1
—
ASCD VHL SPD SEN
P1574
1574
—
1
—
Items
(CONSULT-III screen terms)
DTC*
1
SRT code
Trip
MIL
Reference
page
CONSULT-III
GST*
2
ECM*
3
EC-456
< ECU DIAGNOSIS >
[VQ40DE]
ECM
*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
*4: SRT code will not be set if the self-diagnostic result is NG.
*5: The troubleshooting for this DTC need CONSULT-III.
*6: When the fail-safe operations for both self-diagnoses occur, the MIL illuminates.
*7: When the ECM is in the mode of displaying SRT status, MIL may flash. For the details, refer to "How to Display SRT Status".
Emission-related Diagnostic Information
INFOID:0000000001376546
DTC AND 1ST TRIP DTC
The 1st trip DTC (whose number is the same as the DTC number) is displayed for the latest self-diagnostic
result obtained. If the ECM memory was cleared previously, and the 1st trip DTC did not reoccur, the 1st trip
DTC will not be displayed.
LOCK MODE
P1610
1610
—
2
—
or
ID DISCARD IMM-ECM
P1611
1611
—
2
—
or
CHAIN OF ECM-IMMU
P1612
1612
—
2
—
or
CHAIN OF IMMU-KEY
P1614
1614
—
2
—
or
DIFFERENCE OF KEY
P1615
1615
—
2
—
or
IN PLUY SPEED
P1715
1715
—
2
—
A/T INTERLOCK
P1730
1730
—
1
×
I/C SOLENOID/CIRC
P1752
1752
—
1
×
FR/B SOLENOID/CIRC
P1757
1757
—
1
×
D/C SOLENOID/CIRC
P1762
1762
—
1
×
HLR/C SOL/CIRC
P1767
1767
—
1
×
LC/B SOLENOID/CIRC
P1772
1772
—
1
×
LC/B SOLENOID FNCT
P1774
1774
—
1
×
VIAS S/V-1
P1800
1800
—
2
—
BRAKE SW/CIRCUIT
P1805
1805
—
2
—
ETC MOT PWR-B1
P2100
2100
—
1
×
ETC FUNCTION/CIRC-B1
P2101
2101
—
1
×
ETC MOT PWR
P2103
2103
—
1
×
ETC MOT-B1
P2118
2118
—
1
×
ETC ACTR-B1
P2119
2119
—
1
×
APP SEN 1/CIRC
P2122
2122
—
1
×
APP SEN 1/CIRC
P2123
2123
—
1
×
APP SEN 2/CIRC
P2127
2127
—
1
×
APP SEN 2/CIRC
P2128
2128
—
1
×
TP SENSOR-B1
P2135
2135
—
1
×
APP SENSOR
P2138
2138
—
1
×
A/F SENSOR1 (B1)
P2A00
2A00
—
2
×
A/F SENSOR1 (B2)
P2A03
2A03
—
2
×
Items
(CONSULT-III screen terms)
DTC*
1
SRT code
Trip
MIL
Reference
page
CONSULT-III
GST*
2
ECM*
3
ECM
EC-457
< ECU DIAGNOSIS >
[VQ40DE]
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If a malfunction is detected during the 1st trip, the 1st trip DTC is stored in the ECM memory. The MIL will not
light up (two trip detection logic). If the same malfunction is not detected in the 2nd trip (meeting the required
driving pattern), the 1st trip DTC is cleared from the ECM memory. If the same malfunction is detected in the
2nd trip, both the 1st trip DTC and DTC are stored in the ECM memory and the MIL lights up. In other words,
the DTC is stored in the ECM memory and the MIL lights up when the same malfunction occurs in two consec-
utive trips. If a 1st trip DTC is stored and a non-diagnostic operation is performed between the 1st and 2nd
trips, only the 1st trip DTC will continue to be stored. For malfunctions that blink or light up the MIL during the
1st trip, the DTC and 1st trip DTC are stored in the ECM memory.
Procedures for clearing the DTC and the 1st trip DTC from the ECM memory are described in "HOW TO
ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION".
For malfunctions in which 1st trip DTCs are displayed, refer to "EMISSION-RELATED DIAGNOSTIC INFOR-
MATION ITEMS". These items are required by legal regulations to continuously monitor the system/compo-
nent. In addition, the items monitored non-continuously are also displayed on CONSULT-III.
1st trip DTC is specified in Service $07 of SAE J1979. 1st trip DTC detection occurs without lighting up the MIL
and therefore does not warn the driver of a malfunction. However, 1st trip DTC detection will not prevent the
vehicle from being tested, for example during Inspection/Maintenance (I/M) tests.
When a 1st trip DTC is detected, check, print out or write down and erase (1st trip) DTC and Freeze Frame
data as specified in Work Flow procedure Step 2, refer to
EC-14, "Trouble Diagnosis Introduction"
. Then per-
form DTC Confirmation Procedure or Overall Function Check to try to duplicate the malfunction. If the mal-
function is duplicated, the item requires repair.
How to Read DTC and 1st Trip DTC
DTC and 1st trip DTC can be read by the following methods.
With CONSULT-III
With GST
CONSULT-III or GST (Generic Scan Tool) Examples: P0340, P0850, P1148, etc.
These DTCs are prescribed by SAE J2012.
(CONSULT-III also displays the malfunctioning component or system.)
No Tools
The number of blinks of the MIL in the Diagnostic Test Mode II (Self-Diagnostic Results) indicates the DTC.
Example: 0340, 0850, 1148, etc.
These DTCs are controlled by NISSAN.
• 1st trip DTC No. is the same as DTC No.
• Output of a DTC indicates a malfunction. However, GST or the Diagnostic Test Mode II do not indi-
cate whether the malfunction is still occurring or has occurred in the past and has returned to nor-
mal. CONSULT-III can identify malfunction status as shown below. Therefore, using CONSULT-III (if
available) is recommended.
DTC or 1st trip DTC of a malfunction is displayed in SELF-DIAGNOSTIC RESULTS mode of CONSULT-III.
Time data indicates how many times the vehicle was driven after the last detection of a DTC.
If the DTC is being detected currently, the time data will be [0].
If a 1st trip DTC is stored in the ECM, the time data will be [1t].
FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME DATA
The ECM records the driving conditions such as fuel system status, calculated load value, engine coolant tem-
perature, short term fuel trim, long term fuel trim, engine speed, vehicle speed, absolute throttle position, base
fuel schedule and intake air temperature at the moment a malfunction is detected.
Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data.
The data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-III or
GST. The 1st trip freeze frame data can only be displayed on the CONSULT-III screen, not on the GST. For
details, see
EC-74, "CONSULT-III Function (ENGINE)"
.
Only one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be stored in the
ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no priority
for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once
freeze frame data (2nd trip detection/MIL on) is stored in the ECM memory, 1st trip freeze frame data is no
longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the fol-
lowing priorities to update the data.
EC-458
< ECU DIAGNOSIS >
[VQ40DE]
ECM
For example, the EGR malfunction (Priority: 2) was detected and the freeze frame data was stored in the 2nd
trip. After that when the misfire (Priority: 1) is detected in another trip, the freeze frame data will be updated
from the EGR malfunction to the misfire. The 1st trip freeze frame data is updated each time a different mal-
function is detected. There is no priority for 1st trip freeze frame data. However, once freeze frame data is
stored in the ECM memory, 1st trip freeze data is no longer stored (because only one freeze frame data or 1st
trip freeze frame data can be stored in the ECM). If freeze frame data is stored in the ECM memory and freeze
frame data with the same priority occurs later, the first (original) freeze frame data remains unchanged in the
ECM memory.
Both 1st trip freeze frame data and freeze frame data (along with the DTCs) are cleared when the ECM mem-
ory is erased. Procedures for clearing the ECM memory are described in "HOW TO ERASE EMISSION-
RELATED DIAGNOSTIC INFORMATION".
SYSTEM READINESS TEST (SRT) CODE
System Readiness Test (SRT) code is specified in Service $01 of SAE J1979.
As part of an enhanced emissions test for Inspection & Maintenance (I/M), certain states require the status of
SRT be used to indicate whether the ECM has completed self-diagnosis of major emission systems and com-
ponents. Completion must be verified in order for the emissions inspection to proceed.
If a vehicle is rejected for a State emissions inspection due to one or more SRT items indicating “INCMP”, use
the information in this Service Manual to set the SRT to “CMPLT”.
In most cases the ECM will automatically complete its self-diagnosis cycle during normal usage, and the SRT
status will indicate “CMPLT” for each application system. Once set as “CMPLT”, the SRT status remains
“CMPLT” until the self-diagnosis memory is erased.
Occasionally, certain portions of the self-diagnostic test may not be completed as a result of the customer's
normal driving pattern; the SRT will indicate “INCMP” for these items.
NOTE:
The SRT will also indicate “INCMP” if the self-diagnosis memory is erased for any reason or if the ECM mem-
ory power supply is interrupted for several hours.
If, during the state emissions inspection, the SRT indicates “CMPLT” for all test items, the inspector will con-
tinue with the emissions test. However, if the SRT indicates “INCMP” for one or more of the SRT items the
vehicle is returned to the customer untested.
NOTE:
If MIL is ON during the state emissions inspection, the vehicle is also returned to the customer untested even
though the SRT indicates “CMPLT” for all test items. Therefore, it is important to check SRT (“CMPLT”) and
DTC (No DTCs) before the inspection.
SRT Item
The table below shows required self-diagnostic items to set the SRT to “CMPLT”.
*1: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the priority for
models with CONSULT-III.
Priority
Items
1
Freeze frame data
Misfire — DTC: P0300 - P0306
Fuel Injection System Function — DTC: P0171, P0172, P0174, P0175
2
Except the above items (Includes A/T related items)
3
1st trip freeze frame data
SRT item
(CONSULT-III indica-
tion)
Perfor-
mance Pri-
ority*1
Required self-diagnostic items to set the SRT to “CMPLT”
Corresponding DTC No.
CATALYST
2
Three way catalyst function
P0420, P0430
EVAP SYSTEM
2
EVAP control system purge flow monitoring
P0441
1
EVAP control system
P0442
2
EVAP control system
P0456
HO2S
1
Air fuel ratio (A/F) sensor 1
P0133, P0153
Heated oxygen sensor 2
P0137, P0157
Heated oxygen sensor 2
P0138, P0158
Heated oxygen sensor 2
P0139, P0159
ECM
EC-459
< ECU DIAGNOSIS >
[VQ40DE]
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SRT Set Timing
SRT is set as “CMPLT” after self-diagnosis has been performed one or more times. Completion of SRT is
done regardless of whether the result is OK or NG. The set timing is different between OK and NG results and
is shown in the table below.
OK: Self-diagnosis is carried out and the result is OK.
NG: Self-diagnosis is carried out and the result is NG.
—: Self-diagnosis is not carried out.
When all SRT related self-diagnoses showed OK results in a single cycle (Ignition OFF-ON-OFF), the SRT will
indicate “CMPLT”.
→
Case 1 above
When all SRT related self-diagnoses showed OK results through several different cycles, the SRT will indicate
“CMPLT” at the time the respective self-diagnoses have at least one OK result.
→
Case 2 above
If one or more SRT related self-diagnoses showed NG results in 2 consecutive cycles, the SRT will also indi-
cate “CMPLT”.
→
Case 3 above
The table above shows that the minimum number of cycles for setting SRT as “INCMP” is one (1) for each
self-diagnosis (Case 1 & 2) or two (2) for one of self-diagnoses (Case 3). However, in preparation for the state
emissions inspection, it is unnecessary for each self-diagnosis to be executed twice (Case 3) for the following
reasons:
• The SRT will indicate “CMPLT” at the time the respective self-diagnoses have one (1) OK result.
• The emissions inspection requires “CMPLT” of the SRT only with OK self-diagnosis results.
• When, during SRT driving pattern, 1st trip DTC (NG) is detected prior to “CMPLT” of SRT, the self-diagnosis
memory must be erased from ECM after repair.
• If the 1st trip DTC is erased, all the SRT will indicate “INCMP”.
NOTE:
SRT can be set as “CMPLT” together with the DTC(s). Therefore, DTC check must always be carried out
prior to the state emission inspection even though the SRT indicates “CMPLT”.
SRT Service Procedure
If a vehicle has failed the state emissions inspection due to one or more SRT items indicating “INCMP”, review
the flowchart diagnostic sequence on the next page.
Self-diagnosis result
Example
Diagnosis
Ignition cycle
←
ON
→
OFF
←
ON
→
OFF
←
ON
→
OFF
←
ON
→
All OK
Case 1
P0400
OK (1)
— (1)
OK (2)
— (2)
P0402
OK (1)
— (1)
— (1)
OK (2)
P1402
OK (1)
OK (2)
— (2)
— (2)
SRT of EGR
“CMPLT”
“CMPLT”
“CMPLT”
“CMPLT”
Case 2
P0400
OK (1)
— (1)
— (1)
— (1)
P0402
— (0)
— (0)
OK (1)
— (1)
P1402
OK (1)
OK (2)
— (2)
— (2)
SRT of EGR
“INCMP”
“INCMP”
“CMPLT”
“CMPLT”
NG exists
Case 3
P0400
OK
OK
—
—
P0402
—
—
—
—
P1402
NG
—
NG
NG
(Consecutive
NG)
(1st trip)
DTC
1st trip DTC
—
1st trip DTC
DTC
(= MIL ON)
SRT of EGR
“INCMP”
“INCMP”
“INCMP”
“CMPLT”
EC-460
< ECU DIAGNOSIS >
[VQ40DE]
ECM
How to Display SRT Status
WITH CONSULT-III
Selecting “SRT STATUS” in “DTC & SRT CONFIRMATION” mode with CONSULT-III.
For items whose SRT codes are set, a “CMPLT” is displayed on the CONSULT-III screen; for items whose
SRT codes are not set, “INCMP” is displayed.
NOTE:
Though displayed on the CONSULT-III screen, “HO2S HTR” is not SRT item.
WITH GST
Selecting Service $01 with GST (Generic Scan Tool)
NO TOOLS
A SRT code itself can no be displayed while only SRT status can be.
1.
Turn ignition switch ON and wait 20 seconds.
2.
SRT status is indicated as shown below.
• When all SRT codes are set, MIL lights up continuously.
*1
"How to Read DTC and 1st Trip DTC" *2
"How to Display SRT Status"
*3
"How to Set SRT Code"
PBIB2320E
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