2006 INFINITI QX56 sensor

ON BOARD DIAGNOSTIC (OBD) SYSTEMEC-49
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Revision: November 2009 2006 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 code
Test value/
Te s t l i m i t
(GST only) Trip MIL
Refer-
ence page
CONSULT-II
GST*
2ECM*3
CAN COMM CIRCUIT U1000
1000*5—— 1×EC-151
CAN COMM CIRCUIT U1001
1001*5—— 2—EC-151
CONTROL UNIT(CAN) U1010 1010——1×EC-154
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED. P0000 0000
———
Flashing*7EC-64
A/F SEN1 HTR (B1) P0031 0031—×2×EC-156
A/F SEN1 HTR (B1) P0032 0032—×2×EC-156
HO2S2 HTR (B1) P0037 0037—×2×EC-163
HO2S2 HTR (B1) P0038 0038—×2×EC-163
A/F SEN1 HTR (B2) P0051 0051—×2×EC-156
A/F SEN1 HTR (B2) P0052 0052—×2×EC-156
HO2S2 HTR (B2) P0057 0057—×2×EC-163
HO2S2 HTR (B2) P0058 0058—×2×EC-163
MAF SEN/CIRCUIT P0101 0101——2×EC-171
MAF SEN/CIRCUIT P0102 0102——1×EC-180
MAF SEN/CIRCUIT P0103 0103——1×EC-180
IAT SEN/CIRCUIT P0112 0112——2×EC-188
IAT SEN/CIRCUIT P0113 0113——2×EC-188
ECT SEN/CIRC P0117 0117——1×EC-192
ECT SEN/CIRC P0118 0118——1×EC-192
TP SEN 2/CIRC P0122 0122——1×EC-198
TP SEN 2/CIRC P0123 0123——1×EC-198
ECT SENSOR P0125 0125——2×EC-205
IAT SENSOR P0127 0127——2×EC-208
THERMSTAT FNCTN P0128 0128——2×EC-211
A/F SENSOR1 (B1) P0130 0130—×2×EC-213
A/F SENSOR1 (B1) P0131 0131—×2×EC-223
A/F SENSOR1 (B1) P0132 0132—×2×EC-232
A/F SENSOR1 (B1) P0133 0133××2 ×EC-241
HO2S2 (B1) P0137 0137××2 ×EC-253
HO2S2 (B1) P0138 0138××2 ×EC-264
HO2S2 (B1) P0139 0139××2 ×EC-277
A/F SENSOR1 (B2) P0150 0150—×2×EC-213
A/F SENSOR1 (B2) P0151 0151—×2×EC-223

EC-50Revision: November 2009
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2006 QX56
A/F SENSOR1 (B2)P0152 0152—×2 ×EC-232
A/F SENSOR1 (B2) P0153 0153××2×EC-241
HO2S2 (B2) P0157 0157××2×EC-253
HO2S2 (B2) P0158 0158××2×EC-264
HO2S2 (B2) P0159 0159××2×EC-277
FUEL SYS-LEAN-B1 P0171 0171——2×EC-288
FUEL SYS-RICH-B1 P0172 0172——2×EC-299
FUEL SYS-LEAN-B2 P0174 0174——2×EC-288
FUEL SYS-RICH-B2 P0175 0175——2×EC-299
FTT SENSOR P0181 0181——2×EC-309
FTT SEN/CIRCUIT P0182 0182——2×EC-315
FTT SEN/CIRCUIT P0183 0183——2×EC-315
TP SEN 1/CIRC P0222 0222——1×EC-320
TP SEN 1/CIRC P0223 0223——1×EC-320
MULTI CYL MISFIRE P0300 0300——2×EC-327
CYL 1 MISFIRE P0301 0301——2×EC-327
CYL 2 MISFIRE P0302 0302——2×EC-327
CYL 3 MISFIRE P0303 0303——2×EC-327
CYL 4 MISFIRE P0304 0304——2×EC-327
CYL 5 MISFIRE P0305 0305——2×EC-327
CYL 6 MISFIRE P0306 0306——2×EC-327
CYL 7 MISFIRE P0307 0307——2×EC-327
CYL 8 MISFIRE P0308 0308——2×EC-327
KNOCK SEN/CIRC-B1 P0327 0327——2—EC-335
KNOCK SEN/CIRC-B1 P0328 0328——2—EC-335
KNOCK SEN/CIRC-B2 P0332 0332——2—EC-335
KNOCK SEN/CIRC-B2 P0333 0333——2—EC-335
CKP SEN/CIRCUIT P0335 0335——2×EC-340
CMP SEN/CIRC-B1 P0340 0340——2×EC-347
TW CATALYST SYS-B1 P0420 0420××2×EC-354
TW CATALYST SYS-B2 P0430 0430××2×EC-354
EVAP PURG FLOW/MON P0441 0441 ××2×EC-360
EVAP SMALL LEAK P0442 0442××2×EC-365
PURG VOLUME CONT/V P0443 0443 ——2×EC-373
PURG VOLUME CONT/V P0444 0444 ——2×EC-381
PURG VOLUME CONT/V P0445 0445 ——2×EC-381
VENT CONTROL VALVE P0447 0447——2×EC-388
VENT CONTROL VALVE P0448 0448——2×EC-395
EVAP SYS PRES SEN P0451 0451——2×EC-402
EVAP SYS PRES SEN P0452 0452——2×EC-405
EVAP SYS PRES SEN P0453 0453——2×EC-411
EVAP GROSS LEAK P0455 0455——2×EC-419
Items
(CONSULT-II screen terms) DTC*
1
SRT code
Test value/
Te s t l i m i t
(GST only) Trip MIL
Refer-
ence page
CONSULT-II
GST*
2ECM*3

ON BOARD DIAGNOSTIC (OBD) SYSTEMEC-51
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Revision: November 2009 2006 QX56EVAP VERY SML LEAKP0456 0456
×*4× 2×EC-427
FUEL LEV SEN SLOSH P0460 0460——2×EC-436
FUEL LEVEL SENSOR P0461 0461——2×EC-438
FUEL LEVL SEN/CIRC P0462 0462——2×EC-440
FUEL LEVL SEN/CIRC P0463 0463——2×EC-440
VEH SPEED SEN/CIRC*6P0500 0500 ——2×EC-442
ISC SYSTEM P0506 0506——2×EC-444
ISC SYSTEM P0507 0507——2×EC-446
PW ST P SEN/CIRC P0550 0550——2—EC-448
ECM BACK UP/CIRC P0603 0603——2×EC-453
ECM P0605 0605——1 or 2× or — EC-457
SENSOR POWER/CIRC P0643 0643——1×EC-460
TCM P0700 0700——1×AT- 1 0 4
PNP SW/CIRC P0705 0705——2×AT- 1 0 5
ATF TEMP SEN/CIRC P0710 0710——2×AT- 1 2 7
TURBINE REV S/CIRC P0717 0717——2×AT- 1 0 9
VHCL SPD SEN/CIR AT*6P0720 0720 ——2×AT- 11 8
TCC SOLENOID/CIRC P0740 0740——2×AT- 11 8
A/T TCC S/U FNCTN P0744 0744——2×AT- 1 2 0
L/PRESS SOL/CIRC P0745 0745——2×AT- 1 2 2
P-N POS SW/CIRCUIT P0850 0850——2×EC-465
CLOSED LOOP-B1 P1148 1148——1×EC-470
CLOSED LOOP-B2 P1168 1168——1×EC-470
TCS C/U FUNCTN P1211 1211——2—EC-471
TCS/CIRC P1212 1212——2—EC-472
ENG OVER TEMP P1217 1217——1×EC-473
CTP LEARNING P1225 1225——2—EC-483
CTP LEARNING P1226 1226——2—EC-485
ASCD SW P1564 1564——1—EC-487

(Models
with ICC) EC-494

(Models with
ASCD)
ACC COMMAND VALUE*
9P1568 1568 ——1—EC-501
ASCD BRAKE SW P1572 1572——1—EC-502

(Models
with ICC) EC-511

(Models with
ASCD)
Items
(CONSULT-II screen terms) DTC*
1
SRT code
Test value/
Te s t l i m i t
(GST only) Trip MIL
Refer-
ence page
CONSULT-II
GST*
2ECM*3

EC-52Revision: November 2009
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2006 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.
*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" .
*8: 2WD models
*9: Models with ICC
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.
ASCD VHL SPD SEN*8P1574 1574 ——1—EC-519

(Models
with ICC)
EC-521

(Models with
ASCD)
NATS MALFUNCTION P1610 -
P1615 1610 - 1615
—— 2—BL-137
A/T INTERLOCK P1730 1730——1×AT-134
I/C SOLENOID/CIRC P1752 1752——1×AT-139
I/C SOLENOID FNCTN P1754 1754——1×AT-141
FR/B SOLENOID/CIRC P1757 1757——1×AT-143
FR/B SOLENOID FNCT P1759 1759——1×AT-145
D/C SOLENOID/CIRC P1762 1762——1×AT-147
D/C SOLENOID FNCTN P1764 1764——1×AT-149
HLR/C SOL/CIRC P1767 1767——1×AT-151
HLR/C SOL FNCTN P1769 1769——1×AT-153
LC/B SOLENOID/CIRC P1772 1772——1×AT-155
LC/B SOLENOID FNCT P1774 1774——1×AT-157
BRAKE SW/CIRCUIT P1805 1805——2—EC-523
ETC MOT PWR P2100 2100——1×EC-528
ETC FUNCTION/CIRC P2101 2101——1×EC-534
ETC MOT PWR P2103 2103——1×EC-528
ETC MOT P2118 2118——1×EC-540
ETC ACTR P2119 2119——1×EC-545
APP SEN 1/CIRC P2122 2122——1×EC-547
APP SEN 1/CIRC P2123 2123——1×EC-547
APP SEN 2/CIRC P2127 2127——1×EC-553
APP SEN 2/CIRC P2128 2128——1×EC-553
TP SENSOR P2135 2135——1×EC-560
APP SENSOR P2138 2138——1×EC-567
A/F SENSOR1 (B1) P2A00 2A00—×2 ×EC-575
A/F SENSOR1 (B2) P2A03 2A03—×2 ×EC-575
Items
(CONSULT-II screen terms) DTC*
1
SRT code
Test value/
Te s t l i m i t
(GST only) Trip MIL
Refer-
ence page
CONSULT-II
GST*
2ECM*3

ON BOARD DIAGNOSTIC (OBD) SYSTEMEC-55
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Revision: November 2009 2006 QX56
*: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the pr iority 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 2 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
SRT item
(CONSULT-II indication) Performance
Priority* 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 P0400OK (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 P0400OKOK ——
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-60Revision: November 2009
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2006 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.
ItemSelf-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)
P0131 41H 8EH Min.
5mV
P0132 42H 0EH Max. 5mV
P2A00 43H 0EH Max. 0.002
P2A00 44H 8EH Min. 0.002
P0133 45H 8EH Min. 0.002
P0130 46H 0EH Max. 5mV
P0130 47H 8EH Min. 5mV
P0133 48H 8EH Min. 0.002
Air fuel ratio (A/F) sensor 1 (Bank 2) P0151 4CH 8FH Min.
5mV
P0152 4DH 0FH Max. 5mV
P2A03 4EH 0FH Max. 0.002
P2A03 4FH 8FH Min. 0.002
P0153 50H 8FH Min. 0.002
P0150 51H 0FH Max. 5mV
P0150 52H 8FH Min. 5mV
P0153 53H 8FH Min. 0.002
Heated oxygen sensor 2 (Bank 1) P0139 19H 86H Min. 10mV/500 ms
P0137 1AH 86H Min. 10 mV
P0138 1BH 06H Max. 10 mV
P0138 1CH 06H Max. 10mV
Heated oxygen sensor 2 (Bank 2) P0159 21H 87H Min. 10 mV/500 ms
P0157 22H 87H Min. 10 mV
P0158 23H 07H Max. 10 mV
P0158 24H 07H Max. 10mV

ON BOARD DIAGNOSTIC (OBD) SYSTEMEC-61
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Revision: November 2009 2006 QX56
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 EC-8, "
INDEX FOR DTC" ), 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.)
HO2S
HEATER A/F sensor 1 heater (Bank 1)
P0032 57H 10H Max. 5 mV
P0031 58H 90H Min.
5 mV
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. 20 mV
P0037 2EH 8AH Min. 20 mV
Heated oxygen sensor 2 heater (Bank 2) P0058 2FH 0BH Max. 20 mV
P0057 30H 8BH Min. 20 mV
Item
Self-diagnostic test item DTCTest value (GST display)
Test limit Conversion
TID CID

EC-64Revision: November 2009
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2006 QX56
MIL Flashing Without DTC
When any SRT codes are not set, MIL may flash without DTC. For the details, refer to EC-57, "How to Display
SRT Status" .
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.
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 EC-57, "
How to Display SRT Status" .
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-64, "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 DI-
31, "WARNING LAMPS" or see EC-635, "MIL AND DATA LINK CONNECTOR" .
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.
PBIB0092E
MIL Condition
ON When the malfunction is detected.
OFF No malfunction.