Nissan Pathfinder (2009 year). Instruction — part 305
EC-454
< ECU DIAGNOSIS >
[VQ40DE]
ECM
• 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.
DTC No.
Detected items
Engine operating condition in fail-safe mode
P0102
P0103
Mass air flow sensor circuit
Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0117
P0118
Engine coolant tempera-
ture sensor circuit
Engine coolant temperature will be determined by ECM based on the following condition.
CONSULT-III displays the engine coolant temperature decided by ECM.
Condition
Engine coolant temperature decided
(CONSULT-III display)
Just as ignition switch is turned ON
or START
40
°
C (104
°
F)
Approx. 4 minutes after engine
starting
80
°
C (176
°
F)
Except as shown above
40 - 80
°
C (104 - 176
°
F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135
Throttle position sensor
The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
Therefore, the acceleration will be poor.
P0643
Sensor power supply
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2100
P2103
Throttle control motor relay
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2101
Electric throttle control
function
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2118
Throttle control motor
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2119
Electric throttle control ac-
tuator
(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator because of regulating the throttle opening
around the idle position. The engine speed will not rise more than 2,000 rpm.
(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator by regulating the throttle opening to 20
degrees or less.
(When ECM detects the throttle valve is stuck open:)
While the vehicle is being driven, it slows down gradually by fuel cut. After the vehicle
stops, the engine stalls.
The engine can restart in N or P position, and engine speed will not exceed 1,000 rpm or
more.
P2122
P2123
P2127
P2128
P2138
Accelerator pedal position
sensor
The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
Therefore, the acceleration will be poor.
Engine operating condition in fail-safe mode
Engine speed will not rise more than 2,500 rpm due to the fuel cut
2009 Pathfinder
ECM
EC-455
< ECU DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
DTC Inspection Priority Chart
INFOID:0000000004297661
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
• If DTC UXXXX is displayed with other DTC, first perform the trouble diagnosis for DTC UXXXX.
• If DTC P0607 is displayed with other DTC, first perform the trouble diagnosis for DTC P0607. Refer to
.
Priority
Detected items (DTC)
1
• U0101 U1001 CAN communication line
• P0101 P0102 P0103 Mass air flow sensor
• P0112 P0113 P0127 Intake air temperature sensor
• P0116 P0117 P0118 P0125 Engine coolant temperature sensor
• P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor
• P0128 Thermostat function
• P0181 P0182 P0183 Fuel tank temperature sensor
• P0327 P0328 P0332 P0333 Knock sensor
• P0335 Crankshaft position sensor (POS)
• P0340 P0345 Camshaft position sensor (PHASE)
• P0460 P0461 P0462 P0463 Fuel level sensor
• P0500 Vehicle speed sensor
• P0605 P607 ECM
• P0643 Sensor power supply
• P0700 TCM
• P0705 P0850 Park/Neutral position (PNP) switch
• P1550 P1551 P1552 P1553 P1554 Battery current sensor
• P1610 - P1615 NATS
• P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor
2
• P0031 P0032 P0051 P0052 Air fuel ratio (A/F) sensor 1 heater
• P0037 P0038 P0057 P0058 Heated oxygen sensor 2 heater
• P0075 P0081 Intake valve timing control solenoid valve
• P0130 P0131 P0132 P0133 P0150 P0151 P0152 P0153 P2A00 P2A03 Air fuel ratio (A/F) sensor 1
• P0137 P0138 P0139 P0157 P0158 P0159 Heated oxygen sensor 2
• P0441 EVAP control system purge flow monitoring
• P0443 P0444 P0445 EVAP canister purge volume control solenoid valve
• P0447 P0448 EVAP canister vent control valve
• P0451 P0452 P0453 EVAP control system pressure sensor
• P0550 Power steering pressure sensor
• P0603 ECM power supply
• P0710 P0717 P0720 P0731 P0732 P0733 P0734 P0735 P0740 P0744 P0745 P1730 P1752 P1757 P1762 P1767
P1772 P1774 A/T related sensors, solenoid valves and switches
• P1217 Engine over temperature (OVERHEAT)
• P1800 VIAS control solenoid valve
• P1805 Brake switch
• P2100 P2103 P2118 Electric throttle control actuator
• P2101 Electric throttle control function
3
• P0011 P0021 Intake valve timing control
• P0171 P0172 P0174 P0175 Fuel injection system function
• P0300 - P0306 Misfire
• P0420 P0430 Three way catalyst function
• P0442 P0455 P0456 EVAP control system
• P0506 P0507 Idle speed control system
• P1148 P1168 Closed loop control
• P1211 TCS control unit
• P1212 TCS communication line
• P1421 Cold start control
• P1564 ASCD steering switch
• P1572 ASCD brake switch
• P1574 ASCD vehicle speed sensor
• P2119 Electric throttle control actuator
2009 Pathfinder
EC-456
< ECU DIAGNOSIS >
[VQ40DE]
ECM
DTC Index
INFOID:0000000004297662
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
LOST COMM (TCM)
U0101
0101*
5
—
1
×
CAN COMM CIRCUIT
U1001
1001*
5
—
2
—
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.
P0000
0000
—
—
Blinking*
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
P0116
0116
—
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
×
2009 Pathfinder
ECM
EC-457
< ECU DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
2009 Pathfinder
EC-458
< ECU DIAGNOSIS >
[VQ40DE]
ECM
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
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 —
ECM
P0607
0607
—
1
×
SENSOR POWER/CIRCUIT
P0643
0643
—
1
×
TCM
P0700
0700
—
1
×
PNP SW/CIRC
P0705
0705
—
2
×
ATF TEMP SEN/CIRC*
7
P0710
0710
—
2
×
TURBINE SENSOR
P0717
0717
—
2
×
VEH SPD SEN/CIR AT
P0720
0720
—
2
×
A/T 1ST GR FNCTN*
7
P0731
0731
—
2
×
A/T 2ND GR FNCTN*
7
P0732
0732
—
2
×
A/T 3RD GR FNCTN*
7
P0733
0733
—
2
×
A/T 4TH GR FNCTN*
7
P0734
0734
—
2
×
A/T 5TH GR FNCTN*
7
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
—
Items
(CONSULT-III screen terms)
DTC*
1
SRT code
Trip
MIL
Reference
page
CONSULT-III
GST*
2
ECM*
3
2009 Pathfinder
ECM
EC-459
< ECU DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
*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 ECM is in the mode of that displays SRT status, MIL may blink. For the details, refer to "How to Display SRT Status".
*7: When erasing this DTC, always use CONSULT-III or GST.
Emission-related Diagnostic Information
INFOID:0000000004297663
DTC AND 1ST TRIP DTC
ASCD VHL SPD SEN
P1574
1574
—
1
—
LOCK MODE
P1610
1610
—
2
—
ID DISCARD IMM-ECM
P1611
1611
—
2
—
CHAIN OF ECM-IMMU
P1612
1612
—
2
—
CHAIN OF IMMU-KEY
P1614
1614
—
2
—
DIFFERENCE OF KEY
P1615
1615
—
2
—
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
2009 Pathfinder
EC-460
< ECU DIAGNOSIS >
[VQ40DE]
ECM
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.
If a malfunction is detected during the 1st trip, the 1st trip DTC is saved in the ECM memory. The MIL will not
illuminate (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 saved in the ECM memory and the MIL illuminates. In other words,
the DTC is saved in the ECM memory and the MIL illuminates when the same malfunction occurs in two con-
secutive trips. If a 1st trip DTC is saved and a non-diagnostic operation is performed between the 1st and 2nd
trips, only the 1st trip DTC will continue to be saved. For malfunctions that blink or illuminate the MIL during
the 1st trip, the DTC and 1st trip DTC are saved 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 illuminating 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 and 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 saved 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 saved in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data.
The data, saved 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-73, "CONSULT-III Function (ENGINE)"
.
Only one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be saved in the
ECM. 1st trip freeze frame data is saved 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 saved in the ECM memory, 1st trip freeze frame data is no
longer saved. Remember, only one set of freeze frame data can be saved in the ECM. The ECM has the fol-
lowing priorities to update the data.
2009 Pathfinder
ECM
EC-461
< ECU DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
For example, the EGR malfunction (Priority: 2) was detected and the freeze frame data was saved 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
saved in the ECM memory, 1st trip freeze data is no longer saved (because only one freeze frame data or 1st
trip freeze frame data can be saved in the ECM). If freeze frame data is saved 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
2009 Pathfinder
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