2005 INFINITI QX4 sensor

ON BOARD REFUELING VAPOR RECOVERY (ORVR)
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Revision: October 20052005 QX56
SYMPTOM: CANNOT REFUEL/FUEL ODOR FROM THE FUEL FILLER OPENING IS STRONG
WHILE REFUELING.
1. CHECK EVAP CANISTER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
2. Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.5 kg (5.5 lb).
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK IF EVAP CANISTER SATURATED WITH WATER
Does water drain from the EVAP canister?
Ye s o r N o
Yes >> GO TO 3.
No >> GO TO 5.
3. REPLACE EVAP CANISTER
Replace EVAP canister with a new one.
>> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.
>> Repair or replace EVAP hose.
5. CHECK VENT HOSES AND VENT TUBES
Check hoses and tubes between EVAP canister and refueling EVAP vapor cut valve for clogging, kink, loose-
ness and improper connection.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace hoses and tubes.
6. CHECK FILLER NECK TUBE
Check recirculation line for clogging, dents and cracks.
OK or NG
OK >> GO TO 7.
NG >> Replace filler neck tube.
BBIA0351E

EC-48Revision: October 2005
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2005 QX56
ON BOARD DIAGNOSTIC (OBD) SYSTEMPFP:00028
IntroductionUBS00KZP
The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including:
The above information can be checked using procedures listed in the table below.
×: Applicable —: Not applicable
*: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other.
The malfunction indicator lamp (MIL) on the instrument panel lights up when the same malfunction is detected
in two consecutive trips (Two trip detection logic), or when the ECM enters fail-safe mode. (Refer to EC-103,
"Fail-safe Chart" .)
Two Trip Detection LogicUBS00KZQ
When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in the
ECM memory. The MIL will not light up at this stage. <1st trip>
If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored in
the ECM memory, and the MIL lights up. The MIL lights up at the same time when the DTC is stored. <2nd
trip> The “trip” in the “Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed
during vehicle operation. Specific on board diagnostic items will cause the ECM to light up or blink the MIL,
and store DTC and Freeze Frame data, even in the 1st trip, as shown below.
×: Applicable —: Not applicable
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.
Emission-related diagnostic information Diagnostic service
Diagnostic Trouble Code (DTC) Service $03 of SAE J1979
Freeze Frame data Service $02 of SAE J1979
System Readiness Test (SRT) code Service $01 of SAE J1979
1st Trip Diagnostic Trouble Code (1st Trip DTC) Service $07 of SAE J1979
1st Trip Freeze Frame data
Test values and Test limits Service $06 of SAE J1979
Calibration ID Service $09 of SAE J1979
DTC 1st trip DTCFreeze
Frame data1st trip Freeze
Frame dataSRT code SRT status Test value
CONSULT-II×× × × × ×—
GST×× ×—×××
ECM××*— — —×—
ItemsMIL DTC 1st trip DTC
1st trip 2nd trip
1st trip
displaying2nd trip
displaying1st trip
displaying2nd trip
display-
ing BlinkingLighting
upBlinkingLighting
up
Misfire (Possible three way cata-
lyst damage) — DTC: P0300 -
P0308 is being detected×———— —×—
Misfire (Possible three way cata-
lyst damage) — DTC: P0300 -
P0308 is being detected——×——×——
One trip detection diagnoses
(Refer to EC-49, "
EMISSION-
RELATED DIAGNOSTIC INFOR-
MATION ITEMS" .)—×——×———
Except above — — —×—××—

ON BOARD DIAGNOSTIC (OBD) SYSTEM
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Revision: October 20052005 QX56
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.
Emission-related Diagnostic InformationUBS00KZR
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
×:Applicable —: Not applicable Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTe s t v a l u e /
Test limit
(GST only)Trip MILRefer-
ence page CONSULT-II
GST*
2ECM*3
CAN COMM CIRCUIT U1000
1000*5—— 1×EC-163
CAN COMM CIRCUIT U1001
1001*5—— 2 —EC-163
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000———
Flashing*7EC-65
HO2S2 HTR (B1) P0037 0037××2×EC-166
HO2S2 HTR (B1) P0038 0038××2×EC-166
HO2S2 HTR (B2) P0057 0057××2×EC-166
HO2S2 HTR (B2) P0058 0058××2×EC-166
MAF SEN/CIRCUIT P0101 0101 — — 2×EC-174
MAF SEN/CIRCUIT P0102 0102 — — 1×EC-183
MAF SEN/CIRCUIT P0103 0103 — — 1×EC-183
IAT SEN/CIRCUIT P0112 0112 — — 2×EC-191
IAT SEN/CIRCUIT P0113 0113 — — 2×EC-191
ECT SEN/CIRCUIT P0117 0117 — — 1×EC-195
ECT SEN/CIRCUIT P0118 0118 — — 1×EC-195
TP SEN 2/CIRC P0122 0122 — — 1×EC-201
TP SEN 2/CIRC P0123 0123 — — 1×EC-201
ECT SENSOR P0125 0125 — — 1×EC-208
IAT SENSOR P0127 0127 — — 2×EC-211
THERMSTAT FNCTN P0128 0128 — — 2×EC-214
HO2S2 (B1) P0138 0138 —×2×EC-216
HO2S2 (B1) P0139 0139××2×EC-225
HO2S2 (B2) P0158 0158 —×2×EC-216
HO2S2 (B2) P0159 0159××2×EC-225
FUEL SYS-LEAN-B1 P0171 0171 — — 2×EC-236
FUEL SYS-RICH-B1 P0172 0172 — — 2×EC-245
FUEL SYS-LEAN-B2 P0174 0174 — — 2×EC-236
FUEL SYS-RICH-B2 P0175 0175 — — 2×EC-245
FTT SENSOR P0181 0181 — — 2×EC-253
FTT SEN/CIRCUIT P0182 0182 — — 2×EC-259
FTT SEN/CIRCUIT P0183 0183 — — 2×EC-259
TP SEN 1/CIRC P0222 0222 — — 1×EC-264
TP SEN 1/CIRC P0223 0223 — — 1×EC-264
MULTI CYL MISFIRE P0300 0300 — — 2×EC-271

EC-50Revision: October 2005
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2005 QX56
CYL 1 MISFIRE P0301 0301 — — 2×EC-271
CYL 2 MISFIRE P0302 0302 — — 2×EC-271
CYL 3 MISFIRE P0303 0303 — — 2×EC-271
CYL 4 MISFIRE P0304 0304 — — 2×EC-271
CYL 5 MISFIRE P0305 0305 — — 2×EC-271
CYL 6 MISFIRE P0306 0306 — — 2×EC-271
CYL 7 MISFIRE P0307 0307 — — 2×EC-271
CYL 8 MISFIRE P0308 0308 — — 2×EC-271
KNOCK SEN/CIRC-B1 P0327 0327 — — 2 —EC-279
KNOCK SEN/CIRC-B1 P0328 0328 — — 2 —EC-279
KNOCK SEN/CIRC-B2 P0332 0332 — — 2 —EC-279
KNOCK SEN/CIRC-B2 P0333 0333 — — 2 —EC-279
CKP SEN/CIRCUIT P0335 0335 — — 2×EC-284
CMP SEN/CIRC-B1 P0340 0340 — — 2×EC-291
TW CATALYST SYS-B1 P0420 0420××2×EC-298
TW CATALYST SYS-B2 P0430 0430××2×EC-298
EVAP PURG FLOW/MON P0441 0441××2×EC-304
EVAP SMALL LEAK P0442 0442××2×EC-309
PURG VOLUME CONT/V P0444 0444 — — 2×EC-318
PURG VOLUME CONT/V P0445 0445 — — 2×EC-318
VENT CONTROL VALVE P0447 0447 — — 2×EC-325
EVAP SYS PRES SEN P0451 0451 — — 2×EC-332
EVAP SYS PRES SEN P0452 0452 — — 2×EC-335
EVAP SYS PRES SEN P0453 0453 — — 2×EC-341
EVAP GROSS LEAK P0455 0455 — — 2×EC-349
EVAP VERY SML LEAK P0456 0456
×*4×2×EC-357
FUEL LEV SEN SLOSH P0460 0460 — — 2×EC-366
FUEL LEVEL SENSOR P0461 0461 — — 2×EC-368
FUEL LEVL SEN/CIRC P0462 0462 — — 2×EC-370
FUEL LEVL SEN/CIRC P0463 0463 — — 2×EC-370
VEH SPEED SEN/CIRC*6P0500 0500 — — 2×EC-372
ISC SYSTEM P0506 0506 — — 2×EC-374
ISC SYSTEM P0507 0507 — — 2×EC-376
PW ST P SEN/CIRC P0550 0550 — — 2 —EC-378
ECM P0605 0605 — — 1 or 2× or —EC-383
TCM P0700 0700 — — 1×AT-103
PNP SW/CIRC P0705 0705 — — 2×AT-104
ATF TEMP SEN/CIRC P0710 0710 — — 2×AT-126
VHCL SPD SEN/CIR AT*6P0720 0720 — — 1×AT- 11 5
TCC SOLENOID/CIRC P0740 0740 — — 2×AT- 11 5
A/T TCC S/U FNCTN P0744 0744 — — 2×AT- 11 7
L/PRESS SOL/CIRC P0745 0745 — — 2×AT- 11 9
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTe s t v a l u e /
Test limit
(GST only)Trip MILRefer-
ence page CONSULT-II
GST*
2ECM*3

ON BOARD DIAGNOSTIC (OBD) SYSTEM
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Revision: October 20052005 QX56A/F SEN1 HTR (B1) P1031 1031××2×EC-386
A/F SEN1 HTR (B1) P1032 1032××2×EC-386
A/F SEN1 HTR (B2) P1051 1051××2×EC-386
A/F SEN1 HTR (B2) P1052 1052××2×EC-386
ECM BACK UP/CIRC P1065 1065 — — 2×EC-393
ETC ACTR P1121 1121 — — 1×EC-397
ETC FUNCTION/CIRC P1122 1122 — — 1×EC-399
E T C M O T P W R P 11 2 4 11 2 4 — — 1×EC-405
E T C M O T P W R P 11 2 6 11 2 6 — — 1×EC-405
E T C M O T P 11 2 8 11 2 8 — — 1×EC-410
HO2S2 (B1) P1146 1146××2×EC-415
HO2S2 (B1) P1147 1147××2×EC-426
CLOSED LOOP-B1 P1148 1148 — — 1×EC-437
HO2S2 (B2) P1166 1166××2×EC-415
HO2S2 (B2) P1167 1167××2×EC-426
CLOSED LOOP-B2 P1168 1168 — — 1×EC-437
TCS C/U FUNCTN P1211 1211 — — 2 —EC-438
TCS/CIRC P1212 1212 — — 2 —EC-439
ENG OVER TEMP P1217 1217 — — 1×EC-440
CTP LEARNING P1225 1225 — — 2 —EC-450
CTP LEARNING P1226 1226 — — 2 —EC-452
SENSOR POWER/CIRC P1229 1229 — — 1×EC-454
A/F SENSOR1 (B1) P1271 1271 —×2×EC-459
A/F SENSOR1 (B1) P1272 1272 —×2×EC-468
A/F SENSOR1 (B1) P1273 1273 —×2×EC-477
A/F SENSOR1 (B1) P1274 1274 —×2×EC-487
A/F SENSOR1 (B1) P1276 1276 —×2×EC-497
A/F SENSOR1 (B1) P1278 1278××2×EC-507
A/F SENSOR1 (B1) P1279 1279××2×EC-519
A/F SENSOR1 (B2) P1281 1281 —×2×EC-459
A/F SENSOR1 (B2) P1282 1282 —×2×EC-468
A/F SENSOR1 (B2) P1283 1283 —×2×EC-477
A/F SENSOR1 (B2) P1284 1284 —×2×EC-487
A/F SENSOR1 (B2) P1286 1286 —×2×EC-497
A/F SENSOR1 (B2) P1288 1288××2×EC-507
A/F SENSOR1 (B2) P1289 1289××2×EC-519
PURG VOLUME CONT/V P1444 1444 — — 2×EC-531
VENT CONTROL VALVE P1446 1446 — — 2×EC-539
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTe s t v a l u e /
Test limit
(GST only)Trip MILRefer-
ence page CONSULT-II
GST*
2ECM*3

EC-52Revision: October 2005
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2005 QX56
*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 needs CONSULT-II.
*6: When the fail-safe operations for both self-diagnoses occur at the same time, the MIL illuminates.ASCD SW P1564 1564 — — 1 —EC-545

(Models
with ICC)
EC-552

(Models
with
ASCD)
ACC COMMAND VALUE*
9P1568 1568 — — 1 —EC-559
ASCD BRAKE SW P1572 1572 — — 1 —EC-560

(Models
with ICC)
EC-569

(Models
with
ASCD)
ASCD VHL SPD SEN*
8P1574 1574 — — 1 —EC-577

(Models
with ICC)
EC-579

(Models
with
ASCD)
NATS MALFUNCTIONP1610 -
P16151610 - 1615 — — 2 —BL-137
P-N POS SW/CIRCUIT P1706 1706 — — 2×EC-581
TURBINE REV S/CIRC P1716 1716 — — 2×AT-131
A/T INTERLOCK P1730 1730 — — 1×AT-135
I/C SOLENOID/CIRC P1752 1752 — — 1×AT-140
I/C SOLENOID FNCTN P1754 1754 — — 1×AT-142
FR/B SOLENOID/CIRC P1757 1757 — — 1×AT-144
FR/B SOLENOID FNCT P1759 1759 — — 1×AT-146
D/C SOLENOID/CIRC P1762 1762 — — 1×AT-148
D/C SOLENOID FNCTN P1764 1764 — — 1×AT-150
HLR/C SOL/CIRC P1767 1767 — — 1×AT-152
HLR/C SOL FNCTN P1769 1769 — — 1×AT-154
LC/B SOLENOID/CIRC P1772 1772 — — 1×AT-156
LC/B SOLENOID FNCT P1774 1774 — — 1×AT-158
BRAKE SW/CIRCUIT P1805 1805 — — 2 —EC-586
APP SEN 1/CIRC P2122 2122 — — 1×EC-591
APP SEN 1/CIRC P2123 2123 — — 1×EC-591
APP SEN 2/CIRC P2127 2127 — — 1×EC-597
APP SEN 2/CIRC P2128 2128 — — 1×EC-597
TP SENSOR P2135 2135 — — 1×EC-604
APP SENSOR P2138 2138 — — 1×EC-611
Items
(CONSULT-II screen terms)DTC*
1
SRT codeTe s t v a l u e /
Test limit
(GST only)Trip MILRefer-
ence page CONSULT-II
GST*
2ECM*3

ON BOARD DIAGNOSTIC (OBD) SYSTEM
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Revision: October 20052005 QX56
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”.
*: 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.SRT item
(CONSULT-II indication)Performance
Priority*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 2 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
HO2S HTR 2 Air fuel ratio (A/F) sensor 1 heater P1031, P1032,
P1051, P1052
Heated oxygen sensor 2 heater P0037, P0038,
P0057, P0058
Self-diagnosis resultExample
DiagnosisIgnition 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 — NGNG
(Consecutive
NG)
(1st trip)
DTC1st trip DTC — 1st trip DTCDTC
(= MIL ON)
SRT of EGR “INCMP” “INCMP” “INCMP” “CMPLT”

ON BOARD DIAGNOSTIC (OBD) SYSTEMEC-61
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Revision: October 2005 2005 QX56
TEST VALUE AND TEST LIMIT (GST ONLY — NOT APPLICABLE TO CONSULT-II)
The following is the information specified in Service $06 of SAE J1979.
The test value is a parameter used to determine whether a system/circuit diagnostic test is OK or NG while
being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the
maximum or minimum value and is compared with the test value being monitored.
These data (test value and test limit) are specified by Test ID (TID) and Component ID (CID) and can be dis-
played on the GST screen.
Item Self-diagnostic test item DTCTest 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.
1/128 mm
2
EVAP control system purge flow monitoring P0441 06H 83H Min. 20 mV
EVAP control system (Very small leak) P0456 07H 03H Max. 1/128 mm
2
HO2SAir fuel ratio (A/F) sensor 1 (Bank 1)
P1271 41H 8EH Min. 5mV
P1272 42H 0EH Max. 5mV
P1273 43H 0EH Max. 0.002
P1274 44H 8EH Min. 0.002
P1278
45H 8EH Min. 0.004
P1276 46H 0EH Max. 5mV
P1276 47H 8EH Min. 5mV
P1279 48H 8EH Min. 0.004
Air fuel ratio (A/F) sensor 1 (Bank 2) P1281 4CH 8FH Min. 5mV
P1282 4DH 0FH Max. 5mV
P1283 4EH 0FH Max. 0.002
P1284 4FH 8FH Min. 0.002
P1288
50H 8FH Min. 0.004
P1286 51H 0FH Max. 5mV
P1286 52H 8FH Min. 5mV
P1289 53H 8FH Min. 0.004
Heated oxygen sensor 2 (Bank 1) P0138 1CH 06H Max. 10mV
P0139 19H 86H Min. 10mV/500 ms
P1147 1AH 86H Min. 10 mV
P1146 1BH 06H Max. 10 mV
Heated oxygen sensor 2 (Bank 2) P0158 24H 07H Max. 10mV
P0159 21H 87H Min. 10 mV/500 ms
P1167 22H 87H Min. 10 mV
P1166 23H 07H Max. 10 mV