Nissan Pathfinder (2005 year). Instruction — part 150
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-51
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2005 Pathfinder
A/F SEN1 HTR (B1)
P1032
1032
×
×
2
×
A/F SEN1 HTR (B2)
P1051
1051
×
×
2
×
A/F SEN1 HTR (B2)
P1052
1052
×
×
2
×
ECM BACK UP/CIRC
P1065
1065
—
—
2
×
INT/V TIM V/CIR-B1
P1111
1111
—
—
2
×
ETC ACTR
P1121
1121
—
—
1
×
ETC FUNCTION/CIRC
P1122
1122
—
—
1
×
ETC MOT PWR
P1124
1124
—
—
1
×
ETC MOT PWR
P1126
1126
—
—
1
×
ETC MOT
P1128
1128
—
—
1
×
INT/V TIM V/CIR-B2
P1136
1136
—
—
2
×
HO2S2 (B1)
P1146
1146
×
×
2
×
HO2S2 (B1)
P1147
1147
×
×
2
×
CLOSED LOOP-B1
P1148
1148
—
—
1
×
HO2S2 (B2)
P1166
1166
×
×
2
×
HO2S2 (B2)
P1167
1167
×
×
2
×
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
P1225
1225
—
—
2
—
CTP LEARNING
P1226
1226
—
—
2
—
SENSOR POWER/CIRC
P1229
1229
—
—
1
×
A/F SENSOR1 (B1)
P1271
1271
—
×
2
×
A/F SENSOR1 (B1)
P1272
1272
—
×
2
×
A/F SENSOR1 (B1)
P1273
1273
—
×
2
×
A/F SENSOR1 (B1)
P1274
1274
—
×
2
×
A/F SENSOR1 (B1)
P1276
1276
—
×
2
×
A/F SENSOR1 (B1)
P1278
1278
×
×
2
×
A/F SENSOR1 (B1)
P1279
1279
×
×
2
×
A/F SENSOR1 (B2)
P1281
1281
—
×
2
×
A/F SENSOR1 (B2)
P1282
1282
—
×
2
×
A/F SENSOR1 (B2)
P1283
1283
—
×
2
×
A/F SENSOR1 (B2)
P1284
1284
—
×
2
×
A/F SENSOR1 (B2)
P1286
1286
—
×
2
×
A/F SENSOR1 (B2)
P1288
1288
×
×
2
×
A/F SENSOR1 (B2)
P1289
1289
×
×
2
×
PURG VOLUME CONT/V
P1444
1444
—
—
2
×
VENT CONTROL VALVE
P1446
1446
—
—
2
×
BAT CURRENT SENSOR
P1550
1550
—
—
2
—
BAT CURRENT SENSOR
P1551
1551
—
—
2
—
BAT CURRENT SENSOR
P1552
1552
—
—
2
—
Items
(CONSULT-II screen terms)
DTC*
1
SRT code
Test value/
Test limit
(GST only)
Trip
MIL
Reference
page
CONSULT-II
GST*
2
ECM*
3
EC-52
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2005 Pathfinder
*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-II.
*6: When the fail-safe operations for both self-diagnoses occur at the same time, the MIL illuminates.
*7: When the ECM is in the mode of displaying SRT status, MIL may flash. For the details, refer to
EC-57, "How to Display SRT Status"
.
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.
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.
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
—
NATS MALFUNCTION
P1610 -
P1615
1610 - 1615
—
—
2
—
P-N POS SW/CIRCUIT
P1706
1706
—
—
2
×
TURBINE REV S/CIRC
P1716
1716
—
—
2
×
A/T INTERLOCK
P1730
1730
—
—
1
×
I/C SOLENOID/CIRC
P1752
1752
—
—
1
×
I/C SOLENOID FNCTN
P1754
1754
—
—
1
×
FR/B SOLENOID/CIRC
P1757
1757
—
—
1
×
FR/B SOLENOID/CIRC
P1759
1759
—
—
1
×
D/C SOLENOID/CIRC
P1762
1762
—
—
1
×
D/C SOLENOID FNCTN
P1764
1764
—
—
1
×
HLR/C SOL/CIRC
P1767
1767
—
—
1
×
HLR/C SOL FNCTN
P1769
1769
—
—
1
×
LC/B SOLENOID/CIRC
P1772
1772
—
—
1
×
LC/B SOLENOID FNCT
P1774
1774
—
—
1
×
VIAS S/V CIRC
P1800
1800
—
—
2
—
BRAKE SW/CIRCUIT
P1805
1805
—
—
2
—
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
P2135
2135
—
—
1
×
APP SENSOR
P2138
2138
—
—
1
×
Items
(CONSULT-II screen terms)
DTC*
1
SRT code
Test value/
Test limit
(GST only)
Trip
MIL
Reference
page
CONSULT-II
GST*
2
ECM*
3
ON BOARD DIAGNOSTIC (OBD) SYSTEM
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2005 Pathfinder
Procedures for clearing the DTC and the 1st trip DTC from the ECM memory are described in
TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION"
.
For malfunctions in which 1st trip DTCs are displayed, refer to
EC-49, "EMISSION-RELATED DIAGNOSTIC
. These items are required by legal regulations to continuously monitor the system/
component. In addition, the items monitored non-continuously are also displayed on CONSULT-II.
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
. Then perform DTC Confir-
mation Procedure or Overall Function Check to try to duplicate the malfunction. If the malfunction is dupli-
cated, 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-II
With GST
CONSULT-II or GST (Generic Scan Tool) Examples: P0340, P1148, P1706, etc.
These DTCs are prescribed by SAE J2012.
(CONSULT-II 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, 1148, 1706, 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-II can identify malfunction status as shown below. Therefore, using CONSULT-II (if
available) is recommended.
A sample of CONSULT-II display for DTC and 1st trip DTC is shown below. DTC or 1st trip DTC of a malfunc-
tion is displayed in SELF-DIAGNOSTIC RESULTS mode of CONSULT-II. 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, 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-II or
GST. The 1st trip freeze frame data can only be displayed on the CONSULT-II screen, not on the GST. For
details, see
EC-129, "Freeze Frame Data and 1st Trip Freeze Frame Data"
.
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.
PBIB0911E
EC-54
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2005 Pathfinder
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
SION-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 Instruction 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”.
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-II 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
1
EVAP control system
P0442
2
EVAP control system
P0456
2
EVAP control system purge flow monitoring
P0441
HO2S
1
Air fuel ratio (A/F) sensor 1
P1278, P1288
Air fuel ratio (A/F) sensor 1
P1279, P1289
Heated oxygen sensor 2
P0139, P0159
Heated oxygen sensor 2
P1146, P1166
Heated oxygen sensor 2
P1147, P1167
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-55
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*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-II.
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-diagno-
sis memory must be erased from ECM after repair.
●
If the 1st trip DTC is erased, all the SRT will indicate “INCMP”.
HO2S HTR
1
Air fuel ratio (A/F) sensor 1 heater
P1031, P1032, P1051,
P1052
Heated oxygen sensor 2 heater
P0037, P0038, P0057,
P0058
SRT item
(CONSULT-II indica-
tion)
Perfor-
mance Pri-
ority*1
Required self-diagnostic items to set the SRT to “CMPLT”
Corresponding DTC
No.
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-56
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2005 Pathfinder
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.
*1
*2
*3
PBIB2320E
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-57
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2005 Pathfinder
How to Display SRT Status
WITH CONSULT-II
Selecting “SRT STATUS” in “DTC CONFIRMATION” mode with
CONSULT-II.
For items whose SRT codes are set, a “CMPLT” is displayed on the
CONSULT-II screen; for items whose SRT codes are not set,
“INCMP” is displayed.
A sample of CONSULT-II display for SRT code is shown at right.
“INCMP” means the self-diagnosis is incomplete and SRT is not set.
“CMPLT” means the self-diagnosis is complete and SRT is set.
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.
●
When any SRT codes are not set, MIL will flash periodically for 10 seconds.
How to Set SRT Code
To set all SRT codes, self-diagnosis for the items indicated above must be performed one or more times. Each
diagnosis may require a long period of actual driving under various conditions.
WITH CONSULT-II
Perform corresponding DTC Confirmation Procedure one by one based on Performance Priority in the table
on
.
WITHOUT CONSULT-II
The most efficient driving pattern in which SRT codes can be properly set is explained on the next page. The
driving pattern should be performed one or more times to set all SRT codes.
SEF935Z
PBIB2317E
EC-58
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2005 Pathfinder
Driving Pattern
PBIB2314E
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