2005 INFINITI FX35 knock sensor

EC-16
[VQ35DE]
INDEX FOR DTC
Revision: 2005 July 2005 FX
P0302 0302 CYL 2 MISFIRE EC-285
P0303 0303 CYL 3 MISFIREEC-285
P0304 0304 CYL 4 MISFIREEC-285
P0305 0305 CYL 5 MISFIREEC-285
P0306 0306 CYL 6 MISFIREEC-285
P0327 0327 KNOCK SEN/CIRC-B1EC-295
P0328 0328 KNOCK SEN/CIRC-B1EC-295
P0335 0335 CKP SEN/CIRCUITEC-300
P0340 0340 CMP SEN/CIRC-B1EC-307
P0345 0345 CMP SEN/CIRC-B2EC-307
P0420 0420 TW CATALYST SYS-B1EC-316
P0430 0430 TW CATALYST SYS-B2EC-316
P0441 0441 EVAP PURG FLOW/MONEC-322
P0442 0442 EVAP SMALL LEAKEC-327
P0444 0444 PURG VOLUME CONT/VEC-336
P0445 0445 PURG VOLUME CONT/VEC-336
P0447 0447 VENT CONTROL VALVEEC-343
P0451 0451 EVAP SYS PRES SENEC-350
P0452 0452 EVAP SYS PRES SENEC-353
P0453 0453 EVAP SYS PRES SENEC-359
P0455 0455 EVAP GROSS LEAKEC-367
P0456 0456 EVAP VERY SML LEAKEC-375
P0460 0460 FUEL LEV SEN SLOSHEC-385
P0461 0461 FUEL LEVEL SENSOREC-387
P0462 0462 FUEL LEVL SEN/CIRCEC-389
P0463 0463 FUEL LEVL SEN/CIRCEC-389
P0500 0500
VEH SPEED SEN/CIRC*5EC-391
P0506 0506 ISC SYSTEM EC-393
P0507 0507 ISC SYSTEMEC-395
P0550 0550 PW ST P SEN/CIRCEC-397
P0605 0605 ECMEC-402
P0700 0700 TCM AT- 11 3
P0705 0705 PNP SW/CIRCAT- 11 4
P0710 0710 ATF TEMP SEN/CIRCAT-136
P0720 0720
VEH SPD SEN/CIR AT*5AT- 11 8
P0725 0725 ENGINE SPEED SIG AT-123
P0740 0740 TCC SOLENOID/CIRCAT-125
P0744 0744 A/T TCC S/V FNCTNAT-127
P0745 0745 L/PRESS SOL/CIRCAT-129
P1031 1031 A/F SEN1 HTR (B1)EC-405
P1032 1032 A/F SEN1 HTR (B1)EC-405
P1051 1051 A/F SEN1 HTR (B2)EC-405
DTC*1
Items
(CONSULT-II screen terms) Reference page
CONSULT-II
GST*
2ECM*3

INDEX FOR DTC EC-21
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2005 July 2005 FXHLR/C SOL FNCTN P1769 1769 AT- 1 6 4
HLR/C SOL/CIRC P1767 1767AT- 1 6 2
HO2S2 (B1) P0138 0138EC-228
HO2S2 (B1) P0139 0139EC-237
HO2S2 (B1) P1146 1146EC-442
HO2S2 (B1) P1147 1147EC-453
HO2S2 (B2) P0158 0158EC-228
HO2S2 (B2) P0159 0159EC-237
HO2S2 (B2) P1166 1166EC-442
HO2S2 (B2) P1167 1167EC-453
HO2S2 HTR (B1) P0037 0037EC-178
HO2S2 HTR (B1) P0038 0038EC-178
HO2S2 HTR (B2) P0057 0057EC-178
HO2S2 HTR (B2) P0058 0058EC-178
I/C SOLENOID/CIRC P1752 1752 AT- 1 5 0
I/C SOLENOID FNCTN P1754 1754AT- 1 5 2
IAT SEN/CIRCUIT P0112 0112EC-203
IAT SEN/CIRCUIT P0113 0113EC-203
IAT SENSOR P0127 0127EC-223
INT/V TIM CONT-B1 P0011 0011EC-174
INT/V TIM CONT-B2 P0021 0021EC-174
I N T / V T I M V / C I R - B 1 P 1111 1111EC-417
INT/V TIM V/CIR-B2 P1136 1136EC-417
ISC SYSTEM P0506 0506EC-393
ISC SYSTEM P0507 0507EC-395
KNOCK SEN/CIRC-B1 P0327 0327EC-295
KNOCK SEN/CIRC-B1 P0328 0328EC-295
L/PRESS SOL/CIRC P0745 0745 AT- 1 2 9
LC/B SOLENOID FNCT P1774 1774AT- 1 6 8
LC/B SOLENOID/CIRC P1772 1772AT- 1 6 6
MAF SEN/CIRCUIT P0101 0101EC-186
MAF SEN/CIRCUIT P0102 0102EC-195
MAF SEN/CIRCUIT P0103 0103EC-195
MULTI CYL MISFIRE P0300 0300EC-285
NATS MALFUNCTION P1610 - P1615 1610 - 1615 EC-53
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED. P0000 0000 —
P-N POS SW/CIRCUIT P1706 1706 EC-609
PNP SW/CIRC P0705 0705 AT- 11 4
PURG VOLUME CONT/V P0444 0444EC-336
PURG VOLUME CONT/V P0445 0445EC-336
PURG VOLUME CONT/V P1444 1444EC-560
Items
(CONSULT-II screen terms) DTC*
1
Reference page
CONSULT-II
GST*
2ECM*3

ENGINE CONTROL SYSTEM EC-31
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2005 July 2005 FX
Multiport Fuel Injection (MFI) SystemABS006K7
INPUT/OUTPUT SIGNAL CHART
*1: This sensor is not used to control the engine system under normal conditions.
*2: This signal is sent to the ECM through CAN communication line.
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from both the crankshaft position sensor and the mass air
flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION
In addition, the amount of fuel injected is compensated to improve engine performance under various operat-
ing conditions as listed below.


During warm-up

When starting the engine

During acceleration

Hot-engine operation

When selector lever is changed from N to D

High-load, high-speed operation


During deceleration

During high engine speed operation
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS) Engine speed*
3
Piston position
Fuel injection
& mixture ratio
control Fuel injector
Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Air fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Knock sensor Engine knocking condition
Battery Battery voltage*
3
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2*
1Density of oxygen in exhaust gas
Air conditioner switch*
2Air conditioner operation
Wheel sensor*
2Vehicle speed

ENGINE CONTROL SYSTEM EC-33
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2005 July 2005 FX
FUEL INJECTION TIMING
Two types of systems are used.
Sequential Multiport Fuel Injection System
Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used
when the engine is running.
Simultaneous Multiport Fuel Injection System
Fuel is injected simultaneously into all six cylinders twice each engine cycle. In other words, pulse signals of
the same width are simultaneously transmitted from the ECM.
The six injectors will then receive the signals two times for each engine cycle.
This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.
FUEL SHUT-OFF
Fuel to each cylinder is cut off during deceleration, operation of the engine at excessively high speeds or oper-
ation of the vehicle at excessively high speeds.
Electronic Ignition (EI) SystemABS006K8
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
Firing order: 1 - 2 - 3 - 4 - 5 - 6
The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the
engine. The ignition timing data is stored in the ECM.
The ECM receives information such as the injection pulse width and camshaft position sensor (PHASE) sig-
nal. Computing this information, ignition signals are transmitted to the power transistor.
During the following conditions, the ignition timing is revised by the ECM according to the other data stored in
the ECM.

At starting

During warm-up

At idle

At low battery voltage
SEF179U
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS) Engine speed*
2
Piston position
Ignition timing
control Power transistor
Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Knock sensor Engine knocking
Park/neutral position (PNP) switch Gear position
Battery Battery voltage*
2
Wheel sensor*1Vehicle speed

EC-34
[VQ35DE]
ENGINE CONTROL SYSTEM
Revision: 2005 July 2005 FX

During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
Fuel Cut Control (at No Load and High Engine Speed)ABS006KA
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 is over 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-31, "
Multiport Fuel Injection (MFI) System" .
Sensor Input Signal to ECM ECM function Actuator
Park/neutral position (PNP) switch Neutral position
Fuel cut con-
trol 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

EC-56
[VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2005 July 2005 FX
CYL 1 MISFIRE P0301 0301 — — 2 ×EC-285
CYL 2 MISFIRE P0302 0302 — — 2 ×EC-285
CYL 3 MISFIRE P0303 0303 — — 2 ×EC-285
CYL 4 MISFIRE P0304 0304 — — 2 ×EC-285
CYL 5 MISFIRE P0305 0305 — — 2 ×EC-285
CYL 6 MISFIRE P0306 0306 — — 2 ×EC-285
KNOCK SEN/CIRC-B1 P0327 0327 — — 2 — EC-295
KNOCK SEN/CIRC-B1 P0328 0328 — — 2 —EC-295
CKP SEN/CIRCUIT P0335 0335 — — 2×EC-300
CMP SEN/CIRC-B1 P0340 0340 — — 2 ×EC-307
CMP SEN/CIRC-B2 P0345 0345 — — 2 ×EC-307
TW CATALYST SYS-B1 P0420 0420 ××2×EC-316
TW CATALYST SYS-B2 P0430 0430 ××2×EC-316
EVAP PURG FLOW/MON P0441 0441 ××2×EC-322
EVAP SMALL LEAK P0442 0442 ××2×EC-327
PURG VOLUME CONT/V P0444 0444 — — 2 ×EC-336
PURG VOLUME CONT/V P0445 0445 — — 2 ×EC-336
VENT CONTROL VALVE P0447 0447 — — 2 ×EC-343
EVAP SYS PRES SEN P0451 0451 — — 2 ×EC-350
EVAP SYS PRES SEN P0452 0452 — — 2 ×EC-353
EVAP SYS PRES SEN P0453 0453 — — 2 ×EC-359
EVAP GROSS LEAK P0455 0455 — — 2 ×EC-367
EVAP VERY SML LEAK P0456 0456
× *4× 2 ×EC-375
FUEL LEV SEN SLOSH P0460 0460 — — 2 ×EC-385
FUEL LEVEL SENSOR P0461 0461 — — 2 ×EC-387
FUEL LEVL SEN/CIRC P0462 0462 — — 2 ×EC-389
FUEL LEVEL SEN/CIRC P0463 0463 — — 2 ×EC-389
VEH SPEED SEN/CIRC*6P0500 0500 — — 2 ×EC-391
ISC SYSTEM P0506 0506 — — 2 ×EC-393
ISC SYSTEM P0507 0507 — — 2 ×EC-395
PW ST P SEN/CIRC P0550 0550 — — 2 — EC-397
ECM P0605 0605 — — 1 or 2× or — EC-402
TCM P0700 0700 — — 1 ×AT- 11 3
PNP SW/CIRC P0705 0705 — — 2 ×AT- 11 4
ATF TEMP SEN/CIRC P0710 0710 — — 2 ×AT-136
VEH SPD SEN/CIR AT*6P0720 0720 — — 2 ×AT- 11 8
ENGINE SPEED SIG P0725 0725 — — 2 ×AT-123
TCC SOLENOID/CIRC P0740 0740 — — 2 ×AT-125
A/T TCC S/V FNCTN P0744 0744 — — 2 ×AT-127
L/PRESS SOL/CIRC P0745 0745 — — 2 ×AT-129
A/F SEN1 HTR (B1) P1031 1031 ××2×EC-405
A/F SEN1 HTR (B1) P1032 1032 ××2×EC-405
Items
(CONSULT-II screen terms) DTC*
1
SRT code
Test value/
Test limit
(GST only) Trip
Reference
page
CONSULT-II
GST*
2ECM*3

TROUBLE DIAGNOSIS EC-107
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2005 July 2005 FX
DTC Inspection Priority ChartABS006KP
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC U1000 and/or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-171
.
Priority Detected items (DTC)
1

U1000 U1001 CAN communication line

P0101 P0102 P0103 Mass air flow sensor

P0112 P0113 P0127 Intake air temperature sensor

P0117 P0118 P0125 Engine coolant temperature sensor

P0128 Thermostat function

P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor

P0181 P0182 P0183 Fuel tank temperature sensor

P0327 P0328 Knock sensor

P0335 Crankshaft position sensor (POS)

P0340 P0345 Camshaft position sensor (PHASE)

P0460 P0461 P0462 P0463 Fuel level sensor

P0500 Vehicle speed sensor

P0605 ECM

P0700 TCM

P0705 Park/Neutral position (PNP) switch

P1229 Sensor power supply

P1610 - P1615 NATS

P1706 Park/Neutral position (PNP) switch

P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor

EC-110
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
Symptom Matrix ChartABS006KS
SYSTEM — BASIC ENGINE CONTROL SYSTEM
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 pump circuit 11232 22 3 2 EC-668
Fuel pressure regulator system334444444 4 EC-99
Injector circuit 11232 22 2 EC-661
Evaporative emission system 334444444 4EC-39
Air Positive crankcase ventilation sys-
tem 33 4444444 41
EC-51
Incorrect idle speed adjustment 1 1 1 1 1 EC-78
Electric throttle control actuator 112332222 2 2 EC-424,
EC-426
IgnitionIncorrect ignition timing adjustment33111 11 1 EC-78
Ignition circuit 11222 22 2EC-648
Power supply and ground circuit22333 33 23 EC-164
Mass air flow sensor circuit
1
12 2
222 2 EC-186,
EC-195
Engine coolant temperature sensor circuit
3 33
EC-208,
EC-220
Air fuel ratio (A/F) sensor EC-488
EC-497
EC-506
EC-516
EC-526
EC-536
EC-548
Throttle position sensor circuit
22 EC-213
,
EC-278
,
EC-479
,
EC-481
,
EC-633
Accelerator pedal position sensor circuit 3 2 1 EC-483
,
EC-619
,
EC-626
,
EC-640
Knock sensor circuit 2 3 EC-295
Crankshaft position sensor (POS) circuit 2 2EC-300
Camshaft position sensor (PHASE) circuit 3 2EC-307