2006 INFINITI FX35 power steering

TROUBLE DIAGNOSIS FOR SYSTEM BRC-37
[VDC/TCS/ABS]
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BRC
Revision: 2006 December 2006 FX35/FX45
5. CHECK WHEEL SENSOR HARNESS
1. Turn ignition switch OFF and disconnect malfunctioning wheel sensor connector E46 (FR-LH), E33 (FR-RH) or B69 (RR) and
ABS actuator and electric unit (control unit) connector E56.
2. Check continuity between terminals. (Also check the continuity when steering wheel is turned right and left and when sensor
harness inside wheel well is moved.)
OK or NG
OK >> GO TO 6.
NG >> Repair or replace harness and connector that have malfunction.
6. CHECK WHEEL SENSOR
1. Replace wheel sensor that resulted in malfunction by self-diagnosis.
2. Reconnect connectors, drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute, and then perform self-diagnosis.
Is above displayed on self-diagnosis display?
OK >> Wheel sensor has malfunction.
NG >>

Replace ABS actuator and electric unit (control unit).

Perform to self-diagnosis again, and make sure that the result shows “NO DTC IS DETECTED.
FURTHER TESTING MAY BE REQUIRED”.
SFIA1186E
Power supply circuit Signal circuit Ground circuit
Wheel ABS actuator
and electric unit (control unit) Wheel sensor ABS actuator
and electric unit (control unit) Wheel sensor ABS actuator and elec-
tric unit (control unit) (signal) ABS actuator and elec-
tric unit (control unit) (ground)
Front RH 34 1 33 2 33, 34
16, 47
Front LH 45 1 46 2 45, 46
Rear RH 43 1 42 2 43, 42
Rear LH 36 3 37 4 36, 37
Power supply circuit : Continuity should exist.
Signal circuit : Continuity should exist.
Ground circuit : Continuity should not exist.

EC-5
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Revision: 2006 December 2006 FX35/FX45 DTC Confirmation Procedure ..............................
. 435
Wiring Diagram ................................................... . 436
Diagnostic Procedure .......................................... . 437
Component Inspection ........................................ . 441
DTC P0455 EVAP CONTROL SYSTEM ............... . 442
On Board Diagnosis Logic .................................. . 442
DTC Confirmation Procedure .............................. . 443
Diagnostic Procedure .......................................... . 444
DTC P0456 EVAP CONTROL SYSTEM ............... . 450
On Board Diagnosis Logic .................................. . 450
DTC Confirmation Procedure .............................. . 451
Overall Function Check ....................................... . 452
Diagnostic Procedure .......................................... . 453
DTC P0460 FUEL LEVEL SENSOR ..................... . 460
Component Description ....................................... . 460
On Board Diagnosis Logic .................................. . 460
DTC Confirmation Procedure .............................. . 460
Diagnostic Procedure .......................................... . 461
Removal and Installation ..................................... . 461
DTC P0461 FUEL LEVEL SENSOR ..................... . 462
Component Description ....................................... . 462
On Board Diagnosis Logic .................................. . 462
Overall Function Check ....................................... . 462
Diagnostic Procedure .......................................... . 463
Removal and Installation ..................................... . 463
DTC P0462, P0463 FUEL LEVEL SENSOR ......... . 464
Component Description ....................................... . 464
On Board Diagnosis Logic .................................. . 464
DTC Confirmation Procedure .............................. . 464
Diagnostic Procedure .......................................... . 465
Removal and Installation ..................................... . 465
DTC P0500 VSS .................................................... . 466
Description .......................................................... . 466
On Board Diagnosis Logic .................................. . 466
DTC Confirmation Procedure .............................. . 466
Overall Function Check ....................................... . 466
Diagnostic Procedure .......................................... . 467
DTC P0506 ISC SYSTEM ...................................... . 468
Description .......................................................... . 468
On Board Diagnosis Logic .................................. . 468
DTC Confirmation Procedure .............................. . 468
Diagnostic Procedure .......................................... . 469
DTC P0507 ISC SYSTEM ...................................... . 470
Description .......................................................... . 470
On Board Diagnosis Logic .................................. . 470
DTC Confirmation Procedure .............................. . 470
Diagnostic Procedure .......................................... . 471
DTC P0550 PSP SENSOR .................................... . 472
Component Description ....................................... . 472
CONSULT-II Reference Value in Data Monitor Mode . 472
On Board Diagnosis Logic .................................. . 472
DTC Confirmation Procedure .............................. . 472
Wiring Diagram ................................................... . 473
Diagnostic Procedure .......................................... . 474
Component Inspection ........................................ . 476
Removal and Installation ..................................... . 476
DTC P0603 ECM POWER SUPPLY ...................... . 477
Component Description ....................................... . 477 On Board Diagnosis Logic ...................................
.477
DTC Confirmation Procedure .............................. .477
Wiring Diagram .................................................... .478
Diagnostic Procedure .......................................... .479
DTC P0605 ECM .................................................... .481
Component Description ....................................... .481
On Board Diagnosis Logic ................................... .481
DTC Confirmation Procedure .............................. .481
Diagnostic Procedure .......................................... .482
DTC P0643 SENSOR POWER SUPPLY ............... .484
On Board Diagnosis Logic ................................... .484
DTC Confirmation Procedure .............................. .484
Wiring Diagram .................................................... .485
Diagnostic Procedure .......................................... .487
DTC P0850 PNP SWITCH ..................................... .489
Component Description ....................................... .489
CONSULT-II Reference Value in Data Monitor Mode .489
On Board Diagnosis Logic ................................... .489
DTC Confirmation Procedure .............................. .489
Overall Function Check ....................................... .490
Wiring Diagram .................................................... .491
Diagnostic Procedure .......................................... .492
DTC P1148, P1168 CLOSED LOOP CONTROL ... .494
On Board Diagnosis Logic ................................... .494
DTC P1211 TCS CONTROL UNIT ......................... .495
Description ........................................................... .495
On Board Diagnosis Logic ................................... .495
DTC Confirmation Procedure .............................. .495
Diagnostic Procedure .......................................... .495
DTC P1212 TCS COMMUNICATION LINE ........... .496
Description ........................................................... .496
On Board Diagnosis Logic ................................... .496
DTC Confirmation Procedure .............................. .496
Diagnostic Procedure .......................................... .496
DTC P1217 ENGINE OVER TEMPERATURE ....... .497
Description ........................................................... .497
CONSULT-II Reference Value in Data Monitor Mode .498
On Board Diagnosis Logic ................................... .498
Overall Function Check ....................................... .499
Wiring Diagram .................................................... .501
Diagnostic Procedure .......................................... .503
Main 12 Causes of Overheating .......................... .508
Component Inspection ......................................... .508
DTC P1225 TP SENSOR ....................................... .510
Component Description ....................................... .510
On Board Diagnosis Logic ................................... .510
DTC Confirmation Procedure .............................. .510
Diagnostic Procedure .......................................... .511
Removal and Installation ..................................... .511
DTC P1226 TP SENSOR ....................................... .512
Component Description ....................................... .512
On Board Diagnosis Logic ................................... .512
DTC Confirmation Procedure .............................. .512
Diagnostic Procedure .......................................... .513
Removal and Installation ..................................... .513
DTC P1564 ICC STEERING SWITCH ................... .514
Component Description ....................................... .514

EC-12Revision: 2006 December 2006 FX35/FX45 On Board Diagnosis Logic ...................................
11 3 7
DTC Confirmation Procedure .............................. 11 3 7
Wiring Diagram .................................................... 11 3 8
Diagnostic Procedure .......................................... 11 3 9
Component Inspection ......................................... 11 4 1
Removal and Installation ..................................... 11 4 1
DTC P0603 ECM POWER SUPPLY ...................... 114 2
Component Description ....................................... 11 4 2
On Board Diagnosis Logic ................................... 11 4 2
DTC Confirmation Procedure .............................. 11 4 2
Wiring Diagram .................................................... 11 4 3
Diagnostic Procedure .......................................... 11 4 4
DTC P0605 ECM .................................................... 114 6
Component Description ....................................... 11 4 6
On Board Diagnosis Logic ................................... 11 4 6
DTC Confirmation Procedure .............................. 11 4 6
Diagnostic Procedure .......................................... 11 4 7
DTC P0643 SENSOR POWER SUPPLY ............... 114 9
On Board Diagnosis Logic ................................... 11 4 9
DTC Confirmation Procedure .............................. 11 4 9
Wiring Diagram .................................................... 11 5 0
Diagnostic Procedure .......................................... 11 5 2
DTC P0850 PNP SWITCH ..................................... 115 4
Component Description ....................................... 11 5 4
CONSULT-II Reference Value in Data Monitor Mode 11 5 4
On Board Diagnosis Logic ................................... 11 5 4
DTC Confirmation Procedure .............................. 11 5 4
Overall Function Check ....................................... 11 5 5
Wiring Diagram .................................................... 11 5 6
Diagnostic Procedure .......................................... 11 5 7
DTC P1140, P1145 IVT CONTROL POSITION SEN-
SOR ........................................................................ 115 9
Component Description ....................................... 11 5 9
CONSULT-II Reference Value in Data Monitor Mode 11 5 9
On Board Diagnosis Logic ................................... 11 5 9
DTC Confirmation Procedure .............................. 11 5 9
Wiring Diagram .................................................... 11 6 1
Diagnostic Procedure .......................................... 11 6 4
Component Inspection ......................................... 11 6 7
Removal and Installation ..................................... 11 6 7
DTC P1148, P1168 CLOSED LOOP CONTROL ... 116 8
On Board Diagnosis Logic ................................... 11 6 8
DTC P1211 TCS CONTROL UNIT ......................... 116 9
Description ........................................................... 11 6 9
On Board Diagnosis Logic ................................... 11 6 9
DTC Confirmation Procedure .............................. 11 6 9
Diagnostic Procedure .......................................... 11 6 9
DTC P1212 TCS COMMUNICATION LINE ........... 117 0
Description ........................................................... 11 7 0
On Board Diagnosis Logic ................................... 11 7 0
DTC Confirmation Procedure .............................. 11 7 0
Diagnostic Procedure .......................................... 11 7 0
DTC P1217 ENGINE OVER TEMPERATURE ....... 117 1
Description ........................................................... 11 7 1
CONSULT-II Reference Value in Data Monitor Mode 11 7 2
On Board Diagnosis Logic ................................... 11 7 2 Overall Function Check ........................................
11 7 3
Wiring Diagram .................................................... 11 7 5
Diagnostic Procedure ........................................... 11 7 7
Main 13 Causes of Overheating .......................... 11 8 1
Component Inspection ......................................... 11 8 2
DTC P1225 TP SENSOR ....................................... 11 83
Component Description ....................................... 11 8 3
On Board Diagnosis Logic ................................... 11 8 3
DTC Confirmation Procedure ............................... 11 8 3
Diagnostic Procedure ........................................... 11 8 4
Removal and Installation ...................................... 11 8 4
DTC P1226 TP SENSOR ....................................... 11 85
Component Description ....................................... 11 8 5
On Board Diagnosis Logic ................................... 11 8 5
DTC Confirmation Procedure ............................... 11 8 5
Diagnostic Procedure ........................................... 11 8 6
Removal and Installation ...................................... 11 8 6
DTC P1564 ICC STEERING SWITCH ................... 11 87
Component Description ....................................... 11 8 7
CONSULT-II Reference Value in Data Monitor Mode 11 8 7
On Board Diagnosis Logic ................................... 11 8 7
DTC Confirmation Procedure ............................... 11 8 8
Wiring Diagram .................................................... 11 8 9
Diagnostic Procedure ........................................... 11 9 0
Component Inspection ......................................... 11 9 3
DTC P1564 ASCD STEERING SWITCH ............... 11 94
Component Description ....................................... 11 9 4
CONSULT-II Reference Value in Data Monitor Mode 11 9 4
On Board Diagnosis Logic ................................... 11 9 4
DTC Confirmation Procedure ............................... 11 9 5
Wiring Diagram .................................................... 11 9 6
Diagnostic Procedure ........................................... 11 9 7
Component Inspection ......................................... 1200
DTC P1568 ICC FUNCTION .................................. 1201
On Board Diagnosis Logic ................................... 1201
DTC Confirmation Procedure ............................... 1201
Diagnostic Procedure ........................................... 1201
DTC P1572 ICC BRAKE SWITCH ......................... 1202
Component Description ....................................... 1202
CONSULT-II Reference Value in Data Monitor Mode 1202
On Board Diagnosis Logic ................................... 1202
DTC Confirmation Procedure ............................... 1203
Wiring Diagram .................................................... 1204
Diagnostic Procedure ........................................... 1205
Component Inspection ......................................... 1210
DTC P1572 ASCD BRAKE SWITCH ..................... 1211
Component Description ....................................... 1211
CONSULT-II Reference Value in Data Monitor Mode 1211
On Board Diagnosis Logic ................................... 1211
DTC Confirmation Procedure ............................... 1212
Wiring Diagram .................................................... 1213
Diagnostic Procedure ........................................... 1214
Component Inspection ......................................... 1218
DTC P1574 ICC VEHICLE SPEED SENSOR ........ 1219
Component Description ....................................... 1219

ENGINE CONTROL SYSTEM EC-31
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
Multiport Fuel Injection (MFI) SystemNBS003L2
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 Air conditioner operation*
2
Wheel sensorVehicle speed*2

AIR CONDITIONING CUT CONTROL EC-35
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
AIR CONDITIONING CUT CONTROLPFP:23710
Input/Output Signal ChartNBS003L5
*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 DescriptionNBS003L6
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 Air conditioner ON signal*
1
Air conditioner
cut control Air conditioner relay
Accelerator pedal position sensor Accelerator pedal position
Throttle position sensor Throttle 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 Vehicle speed*
1

EC-36
[VQ35DE]
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Revision: 2006 December 2006 FX35/FX45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionNBS003L7
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.
NOTE:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.
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.)
ACCELERATOR 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.
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*

TROUBLE DIAGNOSIS EC-95
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
*: Models with ICC. 2

P0031 P0032 P0051 P0052 Air fuel ratio (A/F) sensor 1 heater

P0037 P0038 P0057 P0058 Heated oxygen sensor 2 heater

P0075 P0081 Intake valve timing control solenoid valve

P0130 P0131 P0132 P0133 P0150 P0151 P0152 P0153 P2A00 P2A03 Air fuel ratio (A/F) sensor 1

P0137 P0138 P0139 P0157 P0158 P0159 Heated oxygen sensor 2

P0441 EVAP control system purge flow monitoring

P0443 P0444 P0445 EVAP canister purge volume control solenoid valve

P0447 P0448 EVAP canister vent control valve

P0451 P0452 P0453 EVAP control system pressure sensor

P0550 Power steering pressure sensor

P0603 ECM power supply

P0710 P0717 P0720 P0740 P0744 P0745 P1730 P1752 P1754 P1757 P1759 P1762 P1764 P1767 P1769 P1772
P1774 A/T related sensors, solenoid valves and switches

P1217 Engine over temperature (OVERHEAT)

P1805 Brake switch

P2100 P2103 P2118 Electric throttle control actuator

P2101 Electric throttle control function
3

P0011 P0021 Intake valve timing control

P0171 P0172 P0174 P0175 Fuel injection system function

P0300 - P0306 Misfire

P0420 P0430 Three way catalyst function

P0442 EVAP control system (SMALL LEAK)

P0455 EVAP control system (GROSS LEAK)

P0456 EVAP control system (VERY SMALL LEAK)

P0506 P0507 Idle speed control system

P1148 P1168 Closed loop control

P1211 TCS control unit

P1212 TCS communication line

P1564 ICC steering switch/ASCD steering switch

P1568 ICC command valve*

P1572 ICC brake switch/ASCD brake switch

P1574 ICC vehicle speed sensor/ASCD vehicle speed sensor

P1715 Turbine revolution sensor

P2119 Electric throttle control actuator
Priority Detected items (DTC)

TROUBLE DIAGNOSIS EC-97
[VQ35DE]
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Revision: 2006 December 2006 FX35/FX45
Symptom Matrix ChartNBS003M0
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-635
Fuel pressure regulator system334444444 4 EC-86
Fuel injector circuit 11232 22 2 EC-628
Evaporative emission system334444444 4 EC-39
Air Positive crankcase ventilation sys-
tem 33 4444444 41
EC-51
Incorrect idle speed adjustment 1 1 1 1 1 EC-77
Electric throttle control actuator 112332222 2 2 EC-562,
EC-573
IgnitionIncorrect ignition timing adjustment33111 11 1 EC-77
Ignition circuit 11222 22 2EC-649
Power supply and ground circuit22333 33 23 EC-149
Mass air flow sensor circuit
1
12 2
222 2 EC-188,
EC-197
Engine coolant temperature sensor circuit
3 33
EC-210,
EC-222
Air fuel ratio (A/F) sensor EC-240
EC-240
EC-249
EC-258
EC-604
Throttle position sensor circuit
22 EC-215
,
EC-339
,
EC-510
,
EC-512
,
EC-589
Accelerator pedal position sensor circuit 3 2 1 EC-484
,
EC-575
,
EC-582
,
EC-596
Knock sensor circuit 2 3 EC-356
Crankshaft position sensor (POS) circuit 2 2EC-361
Camshaft position sensor (PHASE) circuit 3 2EC-368
Vehicle speed signal circuit 2 3 3 3EC-466
Power steering pressure sensor circuit 2 3 3EC-472