2005 INFINITI FX35 steering

BRC-64
[VDC/TCS/ABS]
STEERING ANGLE SENSOR
Revision: 2005 July 2005 FX

EC-6Revision: 2005 July 2005 FX
DTC Confirmation Procedure ..............................
.516
Wiring Diagram .................................................... .518
Diagnostic Procedure .......................................... .521
Removal and Installation ..................................... .525
DTC P1276, P1286 A/F SENSOR 1 ....................... .526
Component Description ....................................... .526
CONSULT-II Reference Value in Data Monitor Mode .526
On Board Diagnosis Logic ................................... .526
DTC Confirmation Procedure .............................. .526
Overall Function Check ....................................... .527
Wiring Diagram .................................................... .529
Diagnostic Procedure .......................................... .532
Removal and Installation ..................................... .535
DTC P1278, P1288 A/F SENSOR 1 ....................... .536
Component Description ....................................... .536
CONSULT-II Reference Value in Data Monitor Mode .536
On Board Diagnosis Logic ................................... .536
DTC Confirmation Procedure .............................. .537
Wiring Diagram .................................................... .539
Diagnostic Procedure .......................................... .542
Removal and Installation ..................................... .547
DTC P1279, P1289 A/F SENSOR 1 ....................... .548
Component Description ....................................... .548
CONSULT-II Reference Value in Data Monitor Mode .548
On Board Diagnosis Logic ................................... .548
DTC Confirmation Procedure .............................. .549
Wiring Diagram .................................................... .551
Diagnostic Procedure .......................................... .554
Removal and Installation ..................................... .559
DTC P1444 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE .............................. .560
Description ........................................................... .560
CONSULT-II Reference Value in Data Monitor Mode .560
On Board Diagnosis Logic ................................... .561
DTC Confirmation Procedure .............................. .561
Wiring Diagram .................................................... .562
Diagnostic Procedure .......................................... .564
Component Inspection ......................................... .567
Removal and Installation ..................................... .567
DTC P1446 EVAP CANISTER VENT CONTROL
VALVE .................................................................... .568
Component Description ....................................... .568
CONSULT-II Reference Value in Data Monitor Mode .568
On Board Diagnosis Logic ................................... .568
DTC Confirmation Procedure .............................. .569
Wiring Diagram .................................................... .570
Diagnostic Procedure .......................................... .571
Component Inspection ......................................... .572
DTC P1564 ICC STEERING SWITCH ................... .574
Component Description ....................................... .574
CONSULT-II Reference Value in Data Monitor Mode .574
On Board Diagnosis Logic ................................... .574
DTC Confirmation Procedure .............................. .574 Wiring Diagram ....................................................
.576
Diagnostic Procedure ........................................... .577
Component Inspection ......................................... .580
DTC P1564 ASCD STEERING SWITCH ............... .581
Component Description ....................................... .581
CONSULT-II Reference Value in Data Monitor Mode .581
On Board Diagnosis Logic ................................... .581
DTC Confirmation Procedure ............................... .582
Wiring Diagram .................................................... .583
Diagnostic Procedure ........................................... .584
Component Inspection ......................................... .586
DTC P1568 ICC FUNCTION .................................. .587
On Board Diagnosis Logic ................................... .587
DTC Confirmation Procedure ............................... .587
Diagnostic Procedure ........................................... .587
DTC P1572 ICC BRAKE SWITCH ......................... .588
Component Description ....................................... .588
CONSULT-II Reference Value in Data Monitor Mode .588
On Board Diagnosis Logic ................................... .588
DTC Confirmation Procedure ............................... .589
Wiring Diagram .................................................... .590
Diagnostic Procedure ........................................... .591
Component Inspection ......................................... .596
DTC P1572 ASCD BRAKE SWITCH ..................... .597
Component Description ....................................... .597
CONSULT-II Reference Value in Data Monitor Mode .597
On Board Diagnosis Logic ................................... .597
DTC Confirmation Procedure ............................... .598
Wiring Diagram .................................................... .599
Diagnostic Procedure ........................................... .600
Component Inspection ......................................... .604
DTC P1574 ICC VEHICLE SPEED SENSOR ........ .605
Component Description ....................................... .605
On Board Diagnosis Logic ................................... .605
DTC Confirmation Procedure ............................... .605
Diagnostic Procedure ........................................... .606
DTC P1574 ASCD VEHICLE SPEED SENSOR .... .607
Component Description ....................................... .607
On Board Diagnosis Logic ................................... .607
DTC Confirmation Procedure ............................... .607
Diagnostic Procedure ........................................... .608
DTC P1706 PNP SWITCH ...................................... .609
Component Description ....................................... .609
CONSULT-II Reference Value in Data Monitor Mode .609
On Board Diagnosis Logic ................................... .609
DTC Confirmation Procedure ............................... .609
Overall Function Check ........................................ .609
Wiring Diagram .................................................... .611
Diagnostic Procedure ........................................... .612
DTC P1805 BRAKE SWITCH ................................ .614
Description ........................................................... .614
CONSULT-II Reference Value in Data Monitor Mode .614
On Board Diagnosis Logic ................................... .614
DTC Confirmation Procedure ............................... .614

EC-13
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Revision: 2005 July 2005 FX
DTC P1444 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE ............................. 1233
Description .......................................................... 1233
CONSULT-II Reference Value in Data Monitor Mode 1233
On Board Diagnosis Logic .................................. 1234
DTC Confirmation Procedure .............................. 1234
Wiring Diagram ................................................... 1235
Diagnostic Procedure .......................................... 1237
Component Inspection ........................................ 1240
Removal and Installation ..................................... 1240
DTC P1446 EVAP CANISTER VENT CONTROL
VALVE .................................................................... 1241
Component Description ....................................... 1241
CONSULT-II Reference Value in Data Monitor Mode 1241
On Board Diagnosis Logic .................................. 1241
DTC Confirmation Procedure .............................. 1242
Wiring Diagram ................................................... 1243
Diagnostic Procedure .......................................... 1244
Component Inspection ........................................ 1245
DTC P1564 ICC STEERING SWITCH ................... 1247
Component Description ....................................... 1247
CONSULT-II Reference Value in Data Monitor Mode 1247
On Board Diagnosis Logic .................................. 1247
DTC Confirmation Procedure .............................. 1248
Wiring Diagram ................................................... 1249
Diagnostic Procedure .......................................... 1250
Component Inspection ........................................ 1253
DTC P1564 ASCD STEERING SWITCH ............... 1254
Component Description ....................................... 1254
CONSULT-II Reference Value in Data Monitor Mode 1254
On Board Diagnosis Logic .................................. 1254
DTC Confirmation Procedure .............................. 1255
Wiring Diagram ................................................... 1256
Diagnostic Procedure .......................................... 1257
Component Inspection ........................................ 1260
DTC P1568 ICC FUNCTION .................................. 1261
On Board Diagnosis Logic .................................. 1261
DTC Confirmation Procedure .............................. 1261
Diagnostic Procedure .......................................... 1261
DTC P1572 ICC BRAKE SWITCH ........................ 1262
Component Description ....................................... 1262
CONSULT-II Reference Value in Data Monitor Mode 1262
On Board Diagnosis Logic .................................. 1262
DTC Confirmation Procedure .............................. 1263
Wiring Diagram ................................................... 1264
Diagnostic Procedure .......................................... 1265
Component Inspection ........................................ 1270
DTC P1572 ASCD BRAKE SWITCH .................... 1271
Component Description ....................................... 1271
CONSULT-II Reference Value in Data Monitor Mode 1271
On Board Diagnosis Logic .................................. 1271
DTC Confirmation Procedure .............................. 1272
Wiring Diagram ................................................... 1273 Diagnostic Procedure ..........................................
1274
Component Inspection ......................................... 1278
DTC P1574 ICC VEHICLE SPEED SENSOR ........ 1279
Component Description ....................................... 1279
On Board Diagnosis Logic ................................... 1279
DTC Confirmation Procedure .............................. 1279
Diagnostic Procedure .......................................... 1280
DTC P1574 ASCD VEHICLE SPEED SENSOR .... 1281
Component Description ....................................... 1281
On Board Diagnosis Logic ................................... 1281
DTC Confirmation Procedure .............................. 1281
Diagnostic Procedure .......................................... 1282
DTC P1706 PNP SWITCH ..................................... 1283
Component Description ....................................... 1283
CONSULT-II Reference Value in Data Monitor Mode 1283
On Board Diagnosis Logic ................................... 1283
DTC Confirmation Procedure .............................. 1283
Overall Function Check ....................................... 1284
Wiring Diagram .................................................... 1285
Diagnostic Procedure .......................................... 1286
DTC P1720 VSS ..................................................... 1288
Description ........................................................... 1288
CONSULT-II Reference Value in Data Monitor Mode 1288
On Board Diagnosis Logic ................................... 1288
DTC Confirmation Procedure .............................. 1288
Diagnostic Procedure .......................................... 1289
DTC P1780 SHIFT CHANGE SIGNAL .................. 1290
Description ........................................................... 1290
On Board Diagnosis Logic ................................... 1290
DTC Confirmation Procedure .............................. 1290
Diagnostic Procedure .......................................... 1290
DTC P1800 VIAS CONTROL SOLENOID VALVE 1292 Component Description ....................................... 1292
CONSULT-II Reference Value in Data Monitor Mode 1292
On Board Diagnosis Logic ................................... 1292
DTC Confirmation Procedure .............................. 1292
Wiring Diagram .................................................... 1293
Diagnostic Procedure .......................................... 1294
Component Inspection ......................................... 1295
Removal and Installation ..................................... 1296
DTC P1805 BRAKE SWITCH ................................ 1297
Description ........................................................... 1297
CONSULT-II Reference Value in Data Monitor Mode 1297
On Board Diagnosis Logic ................................... 1297
DTC Confirmation Procedure .............................. 1297
Wiring Diagram .................................................... 1298
Diagnostic Procedure .......................................... 1299
Component Inspection ......................................... 1301
DTC P2122, P2123 APP SENSOR ........................ 1302
Component Description ....................................... 1302
CONSULT-II Reference Value in Data Monitor Mode 1302
On Board Diagnosis Logic ................................... 1302
DTC Confirmation Procedure .............................. 1303
Wiring Diagram .................................................... 1304

ENGINE CONTROL SYSTEM EC-31
[VQ35DE]
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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

AIR CONDITIONING CUT CONTROL EC-35
[VQ35DE]
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Revision: 2005 July 2005 FX
AIR CONDITIONING CUT CONTROLPFP:23710
Input/Output Signal ChartABS00E8X
*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 DescriptionABS00E8Y
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

EC-36
[VQ35DE]
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Revision: 2005 July 2005 FX
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionABS006ZG
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 indicator and SET indicator in combination meter. If any
malfunction occurs in ASCD system, it automatically deactivates control.
SET OPERATION
Press MAIN switch. (The CRUISE indicator 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 indicator 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

VDC/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 depressing 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.
COAST OPERATION
When the SET/COAST switch is pressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will keep the new set speed.
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
Unified meter and A/C amp.* Vehicle speed
TCM* Powertrain revolution

AUTOMATIC SPEED CONTROL DEVICE (ASCD) EC-37
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Revision: 2005 July 2005 FX
RESUME OPERATION
When the RESUME/ACCELERATE switch is pressed after cancel operation other than depressing MAIN
switch is performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition
must meet following conditions.

Brake pedal is released

Selector lever is in other than P and N positions

Vehicle speed is greater than 40 km/h (25 MPH) and less than 144 km/h (89 MPH)
Component DescriptionABS006ZH
ASCD STEERING SWITCH
Refer to EC-581 .
ASCD BRAKE SWITCH
Refer to EC-597 and EC-688 .
STOP LAMP SWITCH
Refer to EC-597 , EC-614 and EC-688 .
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EC-424 , EC-426 , EC-432 and EC-437 .
ASCD INDICATOR
Refer to EC-695 .

EC-78
[VQ35DE]
BASIC SERVICE PROCEDURE
Revision: 2005 July 2005 FX
BASIC SERVICE PROCEDUREPFP:00018
Basic InspectionABS006KR
1. INSPECTION START
1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for scheduled maintenance.
2. Open engine hood and check the following:
–Harness connectors for improper connections
–Wiring harness for improper connections, pinches and cut
–Vacuum hoses for splits, kinks and improper connections
–Hoses and ducts for leaks
–Air cleaner clogging
–Gasket
3. Confirm that electrical or mechanical loads are not applied.
–Headlamp switch is OFF.
–Air conditioner switch is OFF.
–Rear window defogger switch is OFF.
–Steering wheel is in the straight-ahead position, etc.
4. Start engine and warm it up until engine coolant temperature indicator points the middle of gauge.
Ensure engine stays below 1,000 rpm.
5. Run engine at about 2,000 rpm for about 2 minutes under no- load.
6. Make sure that no DTC is displayed with CONSULT-II or GST.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnostic Procedure.
>> GO TO 3.
SEF983U
SEF976U
SEF977U