sensor INFINITI QX56 2010 Factory Service Manual

EC-460
< ECU DIAGNOSIS >[VK56DE]
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
Revision: April 20092010 QX56

ECM
EC-461
< ECU DIAGNOSIS > [VK56DE]
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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
Revision: April 20092010 QX56

EC-462
< ECU DIAGNOSIS >[VK56DE]
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
Revision: April 20092010 QX56

ECM
EC-465
< ECU DIAGNOSIS > [VK56DE]
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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”
Revision: April 20092010 QX56

EC-470
< ECU DIAGNOSIS >[VK56DE]
ECM
ItemOBD-
MID Self-diagnostic test item
DTCTest value and Test
limit
(GST display) Description
TID Unit and
Scaling ID
HO2S 01H
Air fuel ratio (A/F) sensor 1
(Bank 1) P0131 83H 0BH
Minimum sensor output voltage for test
cycle
P0131 84H 0BH Maximum sensor output voltage for test
cycle
P0130 85H 0BH Minimum sensor output voltage for test
cycle
P0130 86H 0BH Maximum sensor output voltage for test
cycle
P0133 87H 04H Response rate: Response ratio (Lean to
Rich)
P0133 88H 04H Response rate: Response ratio (Rich to
Lean)
P2A00 89H 84H The amount of shift in air fuel ratio
P2A00 8AH 84H The amount of shift in air fuel ratio P0130 8BH 0BH Difference in sensor output voltage
P0133 8CH 83H Response gain at the limited frequency
02H Heated oxygen sensor 2
(Bank 1) P0138 07H 0CH
Minimum sensor output voltage for test
cycle
P0137 08H 0CH Maximum sensor output voltage for test
cycle
P0138 80H 0CH Sensor output voltage
P0139 81H 0CH Difference in sensor output voltage
03H Heated oxygen sensor 3
(Bank 1) P0143 07H 0CH
Minimum sensor output voltage for test
cycle
P0144 08H 0CH Maximum sensor output voltage for test
cycle
P0146 80H 0CH Sensor output voltage
P0145 81H 0CH Difference in sensor output voltage
Revision: April 20092010 QX56

ECM
EC-471
< ECU DIAGNOSIS > [VK56DE]
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HO2S 05H
Air fuel ratio (A/F) sensor 1
(Bank 2) P0151 83H 0BH
Minimum sensor output voltage for test
cycle
P0151 84H 0BH Maximum sensor output voltage for test
cycle
P0150 85H 0BH Minimum sensor output voltage for test
cycle
P0150 86H 0BH Maximum sensor output voltage for test
cycle
P0153 87H 04H Response rate: Response ratio (Lean to
Rich)
P0153 88H 04H Response rate: Response ratio (Rich to
Lean)
P2A03 89H 84H The amount of shift in air fuel ratio
P2A03 8AH 84H The amount of shift in air fuel ratio P0150 8BH 0BH Difference in sensor output voltage
P0153 8CH 83H Response gain at the limited frequency
06H Heated oxygen sensor 2
(Bank 2) P0158 07H 0CH
Minimum sensor output voltage for test
cycle
P0157 08H 0CH Maximum sensor output voltage for test
cycle
P0158 80H 0CH Sensor output voltage
P0159 81H 0CH Difference in sensor output voltage
07H Heated oxygen sensor 3
(Bank2) P0163 07H 0CH
Minimum sensor output voltage for test
cycle
P0164 08H 0CH Maximum sensor output voltage for test
cycle
P0166 80H 0CH Sensor output voltage
P0165 81H 0CH Difference in sensor output voltage
CATA-
LY S T 21H
Three way catalyst function
(Bank1) P0420 80H 01H O2 storage index
P0420 82H 01H
Switching time lag engine exhaust index
value
P2423 83H 0CH Difference in 3rd O2 sensor output volt-
age
P2423 84H 84H O2 storage index in HC trap catalyst
22H Three way catalyst function
(Bank2) P0430 80H 01H O2 storage index
P0430 82H 01H
Switching time lag engine exhaust index
value
P2424 83H 0CH Difference in 3rd O2 sensor output volt-
age
P2424 84H 84H O2 storage index in HC trap catalyst
Item
OBD-
MID Self-diagnostic test item
DTCTest value and Test
limit
(GST display) Description
TID Unit and
Scaling ID
Revision: April 20092010 QX56

EC-472
< ECU DIAGNOSIS >[VK56DE]
ECM
EGR
SYSTEM31H EGR function P0400 80H 96H
Low Flow Faults: EGR temp change
rate (short term)
P0400 81H 96H Low Flow Faults: EGR temp change
rate (long term)
P0400 82H 96H Low Flow Faults: Difference between
max EGR temp and EGR temp under
idling condition
P0400 83H 96H Low Flow Faults: Max EGR temp
P1402 84H 96H High Flow Faults: EGR temp increase
rate
VVT
SYSTEM 35H VVT Monitor (Bank1)
P0011 80H 9DH
VTC intake function diagnosis (VTC
alignment check diagnosis)
P0014 81H 9DH VTC exhaust function diagnosis (VTC
alignment check diagnosis)
P0011 82H 9DH VTC intake function diagnosis (VTC
drive failure diagnosis)
P0014 83H 9DH VTC exhaust function diagnosis (VTC
drive failure diagnosis)
36H VVT Monitor (Bank2) P0021 80H 9DH
VTC intake function diagnosis (VTC
alignment check diagnosis)
P0024 81H 9DH VTC exhaust function diagnosis (VTC
alignment check diagnosis)
P0021 82H 9DH VTC intake function diagnosis (VTC
drive failure diagnosis)
P0024 83H 9DH VTC exhaust function diagnosis (VTC
drive failure diagnosis)
EVAP
SYSTEM 39H
EVAP control system leak
(Cap Off) P0455 80H 0CH
Difference in pressure sensor output
voltage before and after pull down
3BH EVAP control system leak
(Small leak) P0442 80H 05H
Leak area index (for more than 0.04
inch)
3CH EVAP control system leak
(Very small leak) P0456 80H 05H
Leak area index (for more than 0.02
inch)
P0456 81H FDH Maximum internal pressure of EVAP
system during monitoring
3DH Purge flow system P0441 83H 0CHDifference in pressure sensor output
voltage before and after vent control
valve close
O2 SEN-
SOR
HEATER 41H
A/F sensor 1 heater
(Bank 1) Low Input:P0031
High Input:P0032 81H 0BHConverted value of Heater electric cur-
rent to voltage
42H Heated oxygen sensor 2 heat-
er (Bank 1) Low Input:P0037
High Input:P0038 80H 0CH
Converted value of Heater electric cur-
rent to voltage
43H Heated oxygen sensor 3 heat-
er (Bank 1) P0043 80H 0CHConverted value of Heater electric cur-
rent to voltage
45H A/F sensor 1 heater
(Bank 2) Low Input:P0051
High Input:P0052 81
H
0BHConverted value of Heater electric cur-
rent to voltage
46H Heated oxygen sensor 2 heat-
er (Bank 2) Low Input:P0057
High Input:P0058 80H 0CH
Converted value of Heater electric cur-
rent to voltage
47H Heated oxygen sensor 3 heat-
er (Bank 2) P0063 80H 0CHConverted value of Heater electric cur-
rent to voltage
Item
OBD-
MID Self-diagnostic test item
DTCTest value and Test
limit
(GST display) Description
TID Unit and
Scaling ID
Revision: April 20092010 QX56

EC-478
< SYMPTOM DIAGNOSIS >[VK56DE]
ENGINE CONTROL SYSTEM SYMPTOMS
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
SYSTEM — ENGINE MECHANICAL & OTHER
Mass air flow sensor circuit
1
12 2
222 2 EC-104,
EC-110
Engine coolant temperature sensor circuit
333
EC-121,
EC-129
Air fuel ratio (A/F ) sensor 1 circuit EC-137
,
EC-141
,
EC-145
,
EC-149
,
EC-382

Throttle position sensor circuit 22EC-125
,
EC-188
,
EC-306
,
EC-308
,
EC-374
Accelerator pedal position sensor circuit 3 2 1EC-284
,
EC-367
,
EC-370
,
EC-378
Knock sensor circuit 23EC-198
Crankshaft position sensor (POS) circuit 2 2 EC-201
Camshaft position sensor (PHASE) circuit 3 2 EC-205
Vehicle speed signal circuit2 3 33EC-275
Power steering pressu re sensor circuit 23 3 EC-281
ECM 22333333333 EC-284,
EC-286
Intake valve timing control solenoid valve cir-
cuit 32 13223 3
EC-101
Park/Neutral position (PNP) signal circuit3 3 3 33EC-292
Refrigerant pressure sensor circuit 233 4 EC-419
Electrical load signal circuit 3EC-394
Air conditioner circuit 223333333 3 2 HAC-25
ABS actuator and electric unit (control unit) 4 BRC-36
SYMPTOM
Refer-
ence page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Revision: April 20092010 QX56

ENGINE CONTROL SYSTEM SYMPTOMSEC-479
< SYMPTOM DIAGNOSIS > [VK56DE]
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SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel tank 5
5 FL-11
Fuel piping
5 5 5 5 55FL-6
Va p o r l o c k —
Valve deposit 5 555 55 5—
Poor fuel (Heavy weight gasoline,
Low octane) —
Air Air duct
55555 5 EM-25
Air cleaner
EM-25
Air leakage from air duct
(Mass air flow sensor — electric
throttle control actuator)
5555 EM-25
Electric throttle control actuator
EM-26
Air leakage from intake manifold/
Collector/GasketEM-26
Cranking Battery
111111
11
PG-74
Generator circuit
CHG-6
Starter circuit3 STR-8
Signal plate6 EM-45
Park/Neutral position (PNP) sig-
nal4
TM-45
Engine Cylinder head
55555 55 5 EM-68
Cylinder head gasket 4 3
Cylinder block
66666 66 64
EM-83
Piston
Piston ring
Connecting rod
Bearing
Crankshaft
Va l v e
mecha-
nism Timing chain
55555 55 5EM-45
Camshaft
EM-53
Intake valve timing controlEM-53
Intake valve
3EM-68
Exhaust valve
Revision: April 20092010 QX56

NORMAL OPERATING CONDITIONEC-481
< SYMPTOM DIAGNOSIS > [VK56DE]
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NORMAL OPERATING CONDITION
Fuel Cut Control (at No
Load and High Engine Speed)INFOID:0000000005149501
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
If the engine speed is above 1,800 rpm under no load (for example, the shift position is neutral and engine
speed over is 1,800 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies
based on engine speed.
Fuel cut will be operated until the engine speed reaches 1,500 rpm, then fuel cut will be cancelled.
NOTE:
This function is different from deceleration control listed under EC-28, "
System Description".
Sensor Input signal to ECMECM functionActuator
TCM Neutral position
Fuel cut control Fuel injector
Accelerator pedal position sensor
Accelerator pedal position
Engine coolant temperature sensor Engine coolant temperature
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed
Wheel sensor Vehicle speed*
Revision: April 20092010 QX56