sensor INFINITI FX35 2005 Service Manual

ENGINE CONTROL SYSTEM EC-725
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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)ABS00E40
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
If the engine speed is above 1,400 rpm under no load (for example, the selector lever position is neutral and
engine speed is over 1,400 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off var-
ies based on engine speed.
Fuel cut will be operated until the engine speed reaches 1,000 rpm, then fuel cut will be cancelled.
NOTE:
This function is different from deceleration control listed under Multiport Fuel Injection (MFI) System, EC-722
.
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-726
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AIR CONDITIONING CUT CONTROL
Revision: 2005 July 2005 FX
AIR CONDITIONING CUT CONTROLPFP:23710
Input/Output Signal ChartABS00E41
*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 DescriptionABS00E42
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.

When the accelerator pedal is fully depressed.

When cranking the engine.

At high engine speeds.

When the engine coolant temperature becomes excessively high.

When operating power steering during low engine speed or low vehicle speed.

When engine speed is excessively low.

When refrigerant pressure is excessively low or high.
Sensor Input Signal to ECM ECM function Actuator
Air conditioner switch*
1Air conditioner ON signal
Air conditioner
cut control Air conditioner relay
Accelerator pedal position sensor Accelerator pedal position
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*
2
Engine coolant temperature sensor Engine coolant temperature
Battery Battery voltage*
2
Refrigerant pressure sensor Refrigerant pressure
Power steering pressure sensor Power steering operation
Wheel sensor*
1Vehicle speed

AUTOMATIC SPEED CONTROL DEVICE (ASCD) EC-727
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Revision: 2005 July 2005 FX
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionABS00E43
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h (25 MPH) and 144 km/h (89 MPH).
ECM controls throttle angle of electric throttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE lamp and SET lamp in combination meter. If any malfunc-
tion occurs in ASCD system, it automatically deactivates control.
NOTE:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.
SET OPERATION
Press MAIN switch. (The CRUISE lamp in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89
MPH), press SET/COAST switch. (Then SET lamp in combination meter illuminates.)
ACCEL OPERATION
If the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed until
the switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will keep the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.

CANCEL switch is pressed

More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)

Brake pedal is depressed

Selector lever is changed to N, P, R position

Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed

TCS system is operated
When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator lamp.

Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE lamp may
blink slowly.
When the engine coolant temperature decreases to the normal operating temperature, CRUISE lamp will
stop blinking and the cruise operation will be able to work by pressing SET/COAST switch or RESUME/
ACCELERATE switch.

Malfunction for some self-diagnoses regarding ASCD control: SET lamp will blink quickly.
If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehicle
speed memory will be erased.
Sensor Input signal to ECM ECM function Actuator
ASCD brake switch Brake pedal operation
ASCD vehicle speed control Electric throttle control
actuator
Stop lamp switch Brake pedal operation
ASCD steering switch ASCD steering switch operation
Park/Neutral position (PNP)
switch Gear position
Wheel sensor* Vehicle speed
TCM* Powertrain revolution

EVAPORATIVE EMISSION SYSTEM EC-733
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Revision: 2005 July 2005 FX
Component InspectionABS007XU
EVAP CANISTER
Check EVAP canister as follows:
1. Block port B .
2. Blow air into port A and check that it flows freely out of port C .
3. Release blocked port B .
4. Apply vacuum pressure to port B and check that vacuum pres-
sure exists at the ports A and C .
5. Block port A and B .
6. Apply pressure to port C and check that there is no leakage.
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FULLER CAP)
1. Wipe clean valve housing.
2. Check valve opening pressure and vacuum.
3. If out of specification, replace fuel filler cap as an assembly.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incor-
rect fuel filler cap is used, the MIL may come on.
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to EC-1074 .
FUEL TANK TEMPERATURE SENSOR
Refer to EC-1014 .
EVAP CANISTER VENT CONTROL VALVE
Refer to EC-1081 .
EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to EC-1091 .
PBIB1044E
SEF445Y
Pressure:
15.3 - 20.0 kPa (0.156 - 0.204 kg/cm2 , 2.22
- 2.90 psi)
Va c u u m : − 6.0 to −3.3 kPa ( −0.061 to −0.034 kg/cm
2 ,
− 0.87 to −0.48 psi)
SEF943S

EC-738
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ON BOARD REFUELING VAPOR RECOVERY (ORVR)
Revision: 2005 July 2005 FX
Diagnostic ProcedureABS007XY
SYMPTOM: FUEL ODOR FROM EVAP CANISTER IS STRONG.
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 2.1 kg (4.6 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 REFUELING EVAP VAPOR CUT VALVE
Refer to EC-740, "
Component Inspection" .
OK or NG
OK >> INSPECTION END
NG >> Replace refueling EVAP vapor cut valve with fuel tank.
PBIB1031E

ON BOARD REFUELING VAPOR RECOVERY (ORVR) EC-739
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Revision: 2005 July 2005 FX
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 2.1 kg (4.6 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
Ye s > > G O T O 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 control valve for clogging, kink, looseness 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.
PBIB1031E

ON BOARD DIAGNOSTIC (OBD) SYSTEM EC-745
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Revision: 2005 July 2005 FX
ON BOARD DIAGNOSTIC (OBD) SYSTEMPFP:00028
IntroductionABS00E47
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-799
.)
Two Trip Detection LogicABS00E48
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.
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.
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 DTC Freeze Frame
data 1st trip Freeze
Frame data SRT code SRT status Test value
CONSULT-II ×× × × ×× —
GST ×× × —×××
ECM ××*— — — ×—
Items MIL DTC 1st trip DTC
1st trip 2nd trip 1st trip
displaying 2nd trip
displaying 1st trip
displaying 2nd trip
display- ing
Blinking Lighting
up Blinking Lighting
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-746
.) —
×—— ×———
Except above — — — ×— ×× —

EC-746
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2005 July 2005 FX
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 InformationABS00E49
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
Reference
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CONSULT-II
GST*
2ECM*3
CAN COMM CIRCUIT U1000 1000*4—— 1 × or — EC-862
CAN COMM CIRCUIT U1001
1001*4—— 2 — EC-862
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED. P0000 0000
———
Flashing *7 *8—
INT/V TIM CONT-B1 P0011 0011 — — 2 ×EC-865
INT/V TIM CONT-B2 P0021 0021 — — 2 ×EC-865
HO2S1 HTR (B1) P0031 0031 ××2×EC-877
HO2S1 HTR (B1) P0032 0032 ××2×EC-877
HO2S2 HTR (B1) P0037 0037 ××2×EC-885
HO2S2 HTR (B1) P0038 0038 ××2×EC-885
HO2S1 HTR (B2) P0051 0051 ××2×EC-877
HO2S1 HTR (B2) P0052 0052 ××2×EC-877
HO2S2 HTR (B2) P0057 0057 ××2×EC-885
HO2S2 HTR (B2) P0058 0058 ××2×EC-885
MAF SEN/CIRCUIT P0101 0101 — — 2 ×EC-893
MAF SEN/CIRCUIT P0102 0102 — — 1 ×EC-902
MAF SEN/CIRCUIT P0103 0103 — — 1 ×EC-902
IAT SEN/CIRCUIT P0112 0112 — — 2 ×EC-909
IAT SEN/CIRCUIT P0113 0113 — — 2 ×EC-909
ECT SEN/CIRCUIT P0117 0117 — — 1 ×EC-914
ECT SEN/CIRCUIT P0118 0118 — — 1 ×EC-914
TP SEN 2/CIRC P0122 0122 — — 1 ×EC-920
TP SEN 2/CIRC P0123 0123 — — 1 ×EC-920
ECT SENSOR P0125 0125 — — 1 ×EC-927
IAT SENSOR P0127 0127 — — 2 ×EC-930
THERMSTAT FNCTN P0128 0128 — — 2 ×EC-933
HO2S1 (B1) P0132 0132 — ×2 ×EC-935
HO2S1 (B1) P0133 0133 ××2×EC-944
HO2S1 (B1) P0134 0134 — ×2 ×EC-956
HO2S2 (B1) P0138 0138 — ×2 ×EC-966
HO2S2 (B1) P0139 0139 ××2×EC-975
HO2S1 (B2) P0152 0152 — ×2 ×EC-935
HO2S1 (B2) P0153 0153 ××2×EC-944
HO2S1 (B2) P0154 0154 — ×2 ×EC-956
HO2S2 (B2) P0158 0158 — ×2 ×EC-966
HO2S2 (B2) P0159 0159 ××2×EC-975

ON BOARD DIAGNOSTIC (OBD) SYSTEM EC-747
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Revision: 2005 July 2005 FXFUEL SYS-LEAN-B1 P0171 0171 — — 2 ×EC-986
FUEL SYS-RICH-B1 P0172 0172 — — 2 ×EC-995
FUEL SYS-LEAN-B2 P0174 0174 — — 2 ×EC-986
FUEL SYS-RICH-B2 P0175 0175 — — 2 ×EC-995
FTT SENSOR P0181 0181 — — 2 ×EC-1004
FTT SEN/CIRCUIT P0182 0182 — — 2 ×EC-1010
FTT SEN/CIRCUIT P0183 0183 — — 2 ×EC-1010
TP SEN 1/CIRC P0222 0222 — — 1 ×EC-1015
TP SEN 1/CIRC P0223 0223 — — 1 ×EC-1015
MULTI CYL MISFIRE P0300 0300 — — 2 ×EC-1022
CYL 1 MISFIRE P0301 0301 — — 2 ×EC-1022
CYL 2 MISFIRE P0302 0302 — — 2 ×EC-1022
CYL 3 MISFIRE P0303 0303 — — 2 ×EC-1022
CYL 4 MISFIRE P0304 0304 — — 2 ×EC-1022
CYL 5 MISFIRE P0305 0305 — — 2 ×EC-1022
CYL 6 MISFIRE P0306 0306 — — 2 ×EC-1022
CYL 7 MISFIRE P0307 0307 — — 2 ×EC-1022
CYL 8 MISFIRE P0308 0308 — — 2 ×EC-1022
KNOCK SEN/CIRC-B1 P0327 0327 — — 2 — EC-1031
KNOCK SEN/CIRC-B1 P0328 0328 — — 2 —EC-1031
KNOCK SEN/CIRC-B2 P0332 0332 — — 2 —EC-1031
KNOCK SEN/CIRC-B2 P0333 0333 — — 2 —EC-1031
CKP SEN/CIRCUIT P0335 0335 — — 2×EC-1036
CMP SEN/CIRC-B1 P0340 0340 — — 2 ×EC-1043
TW CATALYST SYS-B1 P0420 0420 ××2×EC-1050
TW CATALYST SYS-B2 P0430 0430 ××2×EC-1050
EVAP PURG FLOW/MON P0441 0441 ××2×EC-1056
EVAP SMALL LEAK P0442 0442 ××2×EC-1061
PURG VOLUME CONT/V P0444 0444 — — 2 ×EC-1069
PURG VOLUME CONT/V P0445 0445 — — 2 ×EC-1069
VENT CONTROL VALVE P0447 0447 — — 2 ×EC-1076
EVAP SYS PRES SEN P0451 0451 — — 2 ×EC-1083
EVAP SYS PRES SEN P0452 0452 — — 2 ×EC-1086
EVAP SYS PRES SEN P0453 0453 — — 2 ×EC-1092
EVAP GROSS LEAK P0455 0455 — — 2 ×EC-1100
EVAP VERY SML LEAK P0456 0456
× *5× 2 ×EC-1108
FUEL LEV SEN SLOSH P0460 0460 — — 2 ×E C - 111 7
FUEL LEVEL SENSOR P0461 0461 — — 2 ×E C - 111 9
FUEL LEVL SEN/CIRC P0462 0462 — — 2 ×EC-1121
FUEL LEVL SEN/CIRC P0463 0463 — — 2 ×EC-1121
VEH SPEED SEN/CIRC*6P0500 0500 — — 2 ×EC-1123
ISC SYSTEM P0506 0506 — — 2 ×EC-1125
Items
(CONSULT-II screen terms) DTC*
1
SRT code
Test value/
Te s t l i m i t
(GST only) Trip MIL
Reference
page
CONSULT-II
GST*
2ECM*3

EC-748
[VK45DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2005 July 2005 FX
ISC SYSTEM P0507 0507 — — 2 ×EC-1127
PW ST P SEN/CIRC P0550 0550 — — 2 — EC-1129
ECM P0605 0605 — — 1 or 2× or — EC-1134
TCM P0700 0700 — — 1 ×AT- 11 3
PNP SW/CIRC P0705 0705 — — 2 ×AT- 11 4
ATF TEMP SEN/CIRC P0710 0710 — — 2 ×AT- 1 3 6
VEH SPD SEN/CIR AT*7P0720 0720 — — 2 ×AT- 11 8
TCC SOLENOID/CIRC P0740 0740 — — 2 ×AT- 1 2 5
A/T TCC S/V FNCTN P0744 0744 — — 2 ×AT- 1 2 7
L/PRESS SOL/CIRC P0745 0745 — — 2 ×AT- 1 2 9
ECM BACK UP/CIRC P1065 1065 — — 2 ×EC-1137
I N T / V T I M V / C I R - B 1 P 1111 1111 — — 2 ×EC-1141
ETC ACTR P1121 1121 — — 1 ×EC-1148
ETC FUNCTION/CIRC P1122 1122 — — 1 ×EC-1150
ETC MOT PWR P1124 1124 — — 1 ×EC-1156
ETC MOT PWR P1126 1126 — — 1 ×EC-1156
ETC MOT P1128 1128 — — 1 ×EC-1161
INT/V TIM V/CIR-B2 P1136 1136 — — 2 ×EC-1141
INTK TIM S/CIRC-B1 P1140 1140 — — 2 ×EC-1166
HO2S1 (B1) P1143 1143 ××2×EC-1174
HO2S1 (B1) P1144 1144 ××2×EC-1180
INTK TIM S/CIRC-B2 P1145 1145 — — 2 ×EC-1166
HO2S2 (B1) P1146 1146 ××2×EC-1187
HO2S2 (B1) P1147 1147 ××2×EC-1198
CLOSED LOOP-B1 P1148 1148 — — 1 ×EC-1209
HO2S1 (B2) P1163 1163 ××2×EC-1174
HO2S1 (B2) P1164 1164 ××2×EC-1180
HO2S2 (B2) P1166 1166 ××2×EC-1187
HO2S2 (B2) P1167 1167 ××2×EC-1198
CLOSED LOOP-B2 P1168 1168 — — 1 ×EC-1209
TCS C/U FUNCTN P1211 1211 — — 2 — EC-1211
TCS/CIRC P1212 1212 — — 2 —EC-1212
ENG OVER TEMP P1217 1217 — — 1×EC-1213
CTP LEARNING P1225 1225 — — 2 — EC-1225
CTP LEARNING P1226 1226 — — 2 —EC-1227
SENSOR POWER/CIRC P1229 1229 — — 1×EC-1229
PURG VOLUME CONT/V P1444 1444 — — 2 ×EC-1233
VENT CONTROL VALVE P1446 1446 — — 2 ×EC-1241
ASCD SW P1564 1564 — — 1 — EC-1247

(Models
with ICC) EC-1254

(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
Reference
page
CONSULT-II
GST*
2ECM*3