2010 INFINITI QX56 ecm

EC-460
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ECM
A/F SENSOR1 (B2)
P01510151—2×EC-141
A/F SENSOR1 (B2) P01520152—2×EC-145
A/F SENSOR1 (B2) P01530153 ×2 ×EC-149
HO2S2 (B2) P01570157 ×2 ×EC-155
HO2S2 (B2) P01580158 ×2 ×EC-160
HO2S2 (B2) P01590159 ×2 ×EC-167
FUEL SYS-LEAN-B1 P01710171—2×EC-172
FUEL SYS-RICH-B1 P01720172—2×EC-177
FUEL SYS-LEAN-B2 P01740174—2×EC-172
FUEL SYS-RICH-B2 P01750175—2×EC-177
FTT SENSOR P01810181—2×EC-182
FTT SEN/CIRCUIT P01820182—2×EC-185
FTT SEN/CIRCUIT P01830183—2×EC-185
TP SEN 1/CIRC-B1 P02220222—1×EC-188
TP SEN 1/CIRC-B1 P02230223—1×EC-188
MULTI CYL MISFIRE P03000300—2×EC-192
CYL 1 MISFIRE P03010301—2×EC-192
CYL 2 MISFIRE P03020302—2×EC-192
CYL 3 MISFIRE P03030303—2×EC-192
CYL 4 MISFIRE P03040304—2×EC-192
CYL 5 MISFIRE P03050305—2×EC-192
CYL 6 MISFIRE P03060306—2×EC-192
CYL 7 MISFIRE P03070307—2×EC-192
CYL 8 MISFIRE P03080308—2×EC-192
KNOCK SEN/CIRC-B1 P03270327—2—EC-198
KNOCK SEN/CIRC-B1 P03280328—2—EC-198
KNOCK SEN/CIRC-B2 P03320332—2—EC-198
KNOCK SEN/CIRC-B2 P03330333—2—EC-198
CKP SEN/CIRCUIT P03350335—2×EC-201
CMP SEN/CIRC-B1 P03400340—2×EC-205
TW CATALYST SYS-B1 P04200420 ×2 ×EC-209
TW CATALYST SYS-B2 P04300430 ×2 ×EC-209
EVAP PURG FLOW/MON P04410441 ×2 ×EC-213
EVAP SMALL LEAK P04420442 ×2 ×EC-218
PURG VOLUME CONT/V P04430443—2×EC-225
PURG VOLUME CONT/V P04440444—2×EC-231
PURG VOLUME CONT/V P04450445—2×EC-231
VENT CONTROL VALVE P04470447—2×EC-234
VENT CONTROL VALVE P04480448—2×EC-238
EVAP SYS PRES SEN P04510451—2×EC-242
EVAP SYS PRES SEN P04520452—2×EC-245
EVAP SYS PRES SEN P04530453—2×EC-249
Items
(CONSULT-IIl screen terms) DTC*
1
SRT code Trip
MILReference
page
CONSULT-IIl
GST*
2ECM*3
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OEVAP GROSS LEAK
P04550455—2×EC-254
EVAP VERY SML LEAK P04560456
×*42 ×EC-261
FUEL LEV SEN SLOSH P04600460—2×EC-269
FUEL LEVEL SENSOR P04610461—2×EC-271
FUEL LEVL SEN/CIRC P04620462—2×EC-273
FUEL LEVL SEN/CIRC P04630463—2×EC-273
VEH SPEED SEN/CIRC*6P0500 0500—2×EC-275
ISC SYSTEM P05060506—2×EC-277
ISC SYSTEM P05070507—2×EC-279
PW ST P SEN/CIRC P05500550—2—EC-281
ECM BACK UP/CIRC P06030603—2×EC-284
ECM P06050605—1 or 2 × or — EC-286
ECM P06070607—1×EC-288
SENSOR POWER/CIRC P06430643—1×EC-289
TRANSMISSION CONT P07000700—1×TM-44
T/M RANGE SENSOR A P07050705—2×TM-45
FLUID TEMP SENSOR A P07100710—2×TM-73
INPUT SPEED SENSOR A P07170717—2×TM-48
OUTPUT SPEED SENSOR*6P0720 0720—2×TM-50
1GR INCORRECT RATION P07310731—2×TM-55
2GR INCORRECT RATION P07320732—2×TM-57
3GR INCORRECT RATION P07330733—2×TM-59
4GR INCORRECT RATION P07340734—2×TM-61
5GR INCORRECT RATION P07350735—2×TM-63
TORQUE CONVERTER P07400740—2×TM-65
TORQUE CONVERTER P07440744—2×TM-67
PC SOLENOID A P07450745—2×TM-69
P-N POS SW/CIRCUIT P08500850—2×EC-292
INTK TIM S/CIRC-B1 P11401140—2×EC-295
INTK TIM S/CIRC-B2 P11451145—2×EC-295
CLOSED LOOP-B1 P11481148—1×EC-299
CLOSED LOOP-B2 P11681168—1×EC-299
TCS C/U FUNCTN P12111211—2—EC-300
TCS/CIRC P12121212—2—EC-301
ENG OVER TEMP P12171217—1×EC-36
CTP LEARNING-B1 P12251225—2—EC-306
CTP LEARNING-B1 P12261226—2—EC-308
COLD START CONTROL P14211421—2×EC-310
BAT CURRENT SENSOR P15501550—2—EC-312
BAT CURRENT SENSOR P15511551—2—EC-316
BAT CURRENT SENSOR P15521552—2—EC-316
BAT CURRENT SENSOR P15531553—2—EC-320
Items
(CONSULT-IIl screen terms) DTC*
1
SRT code Trip
MILReference
page
CONSULT-IIl
GST*
2ECM*3
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EC-462
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ECM
*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012.BAT CURRENT SENSOR
P15541554—2—EC-324
ASCD SW P15641564—1—EC-328

(Models
with ICC) EC-332

(Models
with ASCD)
ICC COMMAND VALUE*
9P1568 1568—1—EC-336
ASCD BRAKE SW P15721572—1—EC-337

(Models
with ICC) EC-344

(Models
with ASCD)
ASCD VHL SPD SEN*
8P1574 1574—1—EC-349

(Models
with ICC)
EC-351

(Models
with ASCD)
ID DISCARD IMM-ECM P16111611—2—SEC-41
CHAIN OF ECM-IMMU P16121612—2—SEC-37
CHAIN OF IMMU-KEY P16141614—2—SEC-31
DIFFERENCE OF KEY P16151615—2—SEC-34
INTERLOCK P17301730—1×TM-78
INPUT CLUTCH SOLENOID P17521752—1×TM-82
FR BRAKE SOLENOID P17571757—1×TM-84
DRCT CLUTCH SOLENOID P17621762—1×TM-86
HLR CLUTCH SOLENOID P17671767—1×TM-88
L C BRAKE SOLENOID P17721772—1×TM-90
L C BRAKE SOLENOID P17741774—1×TM-92
BRAKE SW/CIRCUIT P18051805—2—EC-353
ETC MOT PWR-B1 P21002100—1×EC-356
ETC FUNCTION/CIRC-B1 P21012101—1×EC-359
ETC MOT PWR P21032103—1×EC-356
ETC MOT-B1 P21182118—1×EC-363
ETC ACTR-B1 P21192119—1×EC-365
APP SEN 1/CIRC P21222122—1×EC-367
APP SEN 1/CIRC P21232123—1×EC-367
APP SEN 2/CIRC P21272127—1×EC-370
APP SEN 2/CIRC P21282128—1×EC-370
TP SENSOR-B1 P21352135—1×EC-374
APP SENSOR P21382138—1×EC-378
A/F SENSOR1 (B1) P2A002A00—2×EC-382
A/F SENSOR1 (B2) P2A032A03—2×EC-382
Items
(CONSULT-IIl screen terms) DTC*
1
SRT code Trip
MILReference
page
CONSULT-IIl
GST*
2ECM*3
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*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-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".
*8: 2WD models
*9: Models with ICC
*10: Models without ICC
Emission-related Di agnostic InformationINFOID:0000000005149499
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 previous ly, 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 malfunc tion 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 t he 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. Fo r 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 DT C from the ECM memory are described in "HOW TO
ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION".
For malfunctions in which 1st trip DTCs are displa yed, refer to "EMISSION-RELATED DIAGNOSTIC INFOR-
MATION ITEMS". These items are required by legal r egulations to continuously monitor the system/compo-
nent. In addition, the items monitored non-cont inuously 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-8, "
Trouble Diagnosis Introduction". Then per-
form DTC Confirmation Procedure or Overall Function Che ck 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 malfunc tion. However, GST or the Diagnostic Test Mode II do not indi-
cate whether the malfunction is stil l 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 display ed 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, engi ne speed, vehicle speed, absolute throttle position, base
fuel schedule and intake air temperature at the moment a malfunction is detected.
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EC-464
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ECM
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 ca lled freeze frame data and displayed on CONSULT-III or
GST. The 1st trip freeze frame data can only be disp layed on the CONSULT-III screen, not on the GST. For
details, see EC-63, "
CONSULT-III Function (ENGINE)".
Only one set of freeze frame data (either 1st trip freez e 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.
For example, the EGR malfunction (Priority: 2) was detected and the fr eeze 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 fr eeze frame data is stored in the ECM memory and freeze
frame data with the same priority occurs later, t he first (original) freeze frame data remains unchanged in the
ECM memory.
Both 1st trip freeze frame data and freeze frame dat a (along with the DTCs) are cleared when the ECM mem-
ory is erased. Procedures for clearing the ECM me mory 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 & Ma intenance (I/M), certain states require the status of
SRT be used to indicate whether the ECM has completed self-diagnosis of major emission s\
ystems and com-
ponents. Completion must be verified in order for the emissions inspection to proceed.
If a vehicle is rejected for a State emissions inspec tion 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 indi cates “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 - P0308
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 indication) Performance
Priority* Required self-diagnostic items to set the SRT to “CMPLT”
Corresponding
DTC No.
CATALYST 2 Three way catalyst function P0420, P0430
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*: 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-III.
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. T he 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 se lf-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 cyc les for setting SRT as “INCMP” is one (1) for each
self-diagnosis (Case 1 & 2) or two (2) for one of self-di agnoses (Case 3). However, in preparation for the state
emissions inspection, it is unnecessary for each self-di agnosis 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.
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 P0133, P0153
Heated oxygen sensor 2 P0137, P0157
Heated oxygen sensor 2 P0138, P0158
Heated oxygen sensor 2 P0139, P0159
SRT item
(CONSULT-III 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 P0400OK (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”
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EC-466
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ECM
• 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.
How to Display SRT Status
WITH CONSULT-III
Selecting “SRT STATUS” in “DTC CO NFIRMATION” 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)
*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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NO TOOLS
A SRT code itself can not 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-III
Perform corresponding DTC Confirmation Procedure one by one based on Performance Priority in the table
on "SRT Item".
WITHOUT CONSULT-III
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.
PBIB2317E
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