2007 INFINITI FX35 heater

EC-8Revision: 2006 July 2007 FX35/FX45
Precautions for Procedures without Cowl Top Cover
.685
On Board Diagnostic (OBD) System of Engine and
A/T ....................................................................... .685
Precaution ........................................................... .686
PREPARATION ...................................................... .689
Special Service Tools .......................................... .689
Commercial Service Tools ................................... .690
ENGINE CONTROL SYSTEM ............................... .691
System Diagram .................................................. .691
Multiport Fuel Injection (MFI) System .................. .692
Electronic Ignition (EI) System ............................ .694
Fuel Cut Control (at No Load and High Engine
Speed) ................................................................. .695
AIR CONDITIONING CUT CONTROL ................... .696
Input/Output Signal Chart .................................... .696
System Description .............................................. .696
AUTOMATIC SPEED CONTROL DEVICE (ASCD) .697
System Description .............................................. .697
Component Description ....................................... .698
CAN COMMUNICATION ........................................ .699
System Description .............................................. .699
EVAPORATIVE EMISSION SYSTEM .................... .700
Description ........................................................... .700
Component Inspection ......................................... .703
Removal and Installation ..................................... .704
How to Detect Fuel Vapor Leakage ..................... .704
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ................................................................... .707
System Description .............................................. .707
Diagnostic Procedure .......................................... .708
Component Inspection ......................................... .710
POSITIVE CRANKCASE VENTILATION .............. .712
Description ........................................................... .712
Component Inspection ......................................... .712
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ..................................................................... .714
Description ........................................................... .714
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......... .715
Introduction .......................................................... .715
Two Trip Detection Logic ..................................... .715
Emission-related Diagnostic Information ............. .716
Malfunction Indicator Lamp (MIL) ........................ .730
OBD System Operation Chart ............................. .732
BASIC SERVICE PROCEDURE ............................ .738
Basic Inspection .................................................. .738
Idle Speed and Ignition Timing Check ................. .743
Procedure After Replacing ECM ......................... .744
VIN Registration .................................................. .744
Accelerator Pedal Released Position Learning ... .745
Throttle Valve Closed Position Learning .............. .745
Idle Air Volume Learning ..................................... .745
Fuel Pressure Check ........................................... .747
TROUBLE DIAGNOSIS ......................................... .749
Trouble Diagnosis Introduction ............................ .749
DTC Inspection Priority Chart .............................. .755
Fail-Safe Chart .................................................... .757
Symptom Matrix Chart ......................................... .758
Engine Control Component Parts Location ......... .762
Vacuum Hose Drawing ........................................ .769 Circuit Diagram ....................................................
.770
ECM Harness Connector Terminal Layout ........... .772
ECM Terminals and Reference Value .................. .772
CONSULT-II Function (ENGINE) ......................... .781
Generic Scan Tool (GST) Function ...................... .793
CONSULT-II Reference Value in Data Monitor .... .796
Major Sensor Reference Graph in Data Monitor
Mode .................................................................... .800
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .802
Description ........................................................... .802
Testing Condition ................................................. .802
Inspection Procedure ........................................... .802
Diagnostic Procedure ........................................... .803
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT ...................................................................... .812
Description ........................................................... .812
Diagnostic Procedure ........................................... .812
POWER SUPPLY AND GROUND CIRCUIT .......... .813
Wiring Diagram .................................................... .813
Diagnostic Procedure ........................................... .814
Ground Inspection ................................................ .819
DTC U1000, U1001 CAN COMMUNICATION LINE .820
Description ........................................................... .820
On Board Diagnosis Logic ................................... .820
DTC Confirmation Procedure ............................... .820
Wiring Diagram .................................................... .821
Diagnostic Procedure ........................................... .822
DTC U1010 CAN COMMUNICATION .................... .823
Description ........................................................... .823
On Board Diagnosis Logic ................................... .823
DTC Confirmation Procedure ............................... .823
Diagnostic Procedure ........................................... .824
DTC P0011, P0021 IVT CONTROL ........................ .825
Description ........................................................... .825
CONSULT-II Reference Value in Data Monitor Mode .826
On Board Diagnosis Logic ................................... .826
DTC Confirmation Procedure ............................... .827
Wiring Diagram .................................................... .828
Diagnostic Procedure ........................................... .831
Component Inspection ......................................... .835
Removal and Installation ...................................... .836
DTC P0031, P0032, P0051, P0052 A/F SENSOR 1
HEATER .................................................................. .837
Description ........................................................... .837
CONSULT-II Reference Value in Data Monitor Mode .837
On Board Diagnosis Logic ................................... .837
DTC Confirmation Procedure ............................... .837
Wiring Diagram .................................................... .838
Diagnostic Procedure ........................................... .841
Component Inspection ......................................... .843
Removal and Installation ...................................... .843
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .844
Description ........................................................... .844
CONSULT-II Reference Value in Data Monitor Mode .844
On Board Diagnosis Logic ................................... .844
DTC Confirmation Procedure ............................... .845

EC-14Revision: 2006 July 2007 FX35/FX45
Component Inspection .........................................
1286
Removal and Installation ..................................... 1286
DTC P2A00, P2A03 A/F SENSOR 1 ..................... 1287
Component Description ....................................... 1287
CONSULT-II Reference Value in Data Monitor Mode 1287
On Board Diagnosis Logic ................................... 1287
DTC Confirmation Procedure .............................. 1288
Wiring Diagram .................................................... 1289
Diagnostic Procedure .......................................... 1292
Removal and Installation ..................................... 1298
ASCD BRAKE SWITCH ......................................... 1299
Component Description ....................................... 1299
CONSULT-II Reference Value in Data Monitor Mode 1299
Wiring Diagram .................................................... 1300
Diagnostic Procedure .......................................... 1301
Component Inspection ......................................... 1305
ASCD INDICATOR ................................................. 1306
Component Description ....................................... 1306
CONSULT-II Reference Value in Data Monitor Mode 1306
Wiring Diagram .................................................... 1307
Diagnostic Procedure .......................................... 1308
ELECTRICAL LOAD SIGNAL ............................... 1309
Description ........................................................... 1309
CONSULT-II Reference Value in Data Monitor Mode 1309
Diagnostic Procedure .......................................... 1309
FUEL INJECTOR ................................................... 1311
Component Description ....................................... 1311
CONSULT-II Reference Value in Data Monitor Mode
1311
Wiring Diagram .................................................... 1312
Diagnostic Procedure .......................................... 1313
Component Inspection ......................................... 1317
Removal and Installation ..................................... 1317
FUEL PUMP ........................................................... 1318
Description ........................................................... 1318
CONSULT-II Reference Value in Data Monitor Mode 1318
Wiring Diagram .................................................... 1319
Diagnostic Procedure .......................................... 1320
Component Inspection ......................................... 1323
Removal and Installation ..................................... 1323
ICC BRAKE SWITCH ............................................. 1324
Component Description ....................................... 1324
CONSULT-II Reference Value in Data Monitor Mode 1324
Wiring Diagram .................................................... 1325
Diagnostic Procedure ........................................... 1326
Component Inspection ......................................... 1331
IGNITION SIGNAL ................................................. 1332
Component Description ....................................... 1332
Wiring Diagram .................................................... 1333
Diagnostic Procedure ........................................... 1338
Component Inspection ......................................... 1343
Removal and Installation ...................................... 1344
REFRIGERANT PRESSURE SENSOR ................. 1345
Component Description ....................................... 1345
Wiring Diagram .................................................... 1346
Diagnostic Procedure ........................................... 1347
Removal and Installation ...................................... 1349
SNOW MODE SWITCH .......................................... 1350
Description ........................................................... 1350
CONSULT-II Reference Value in the Data Monitor
Mode .................................................................... 1350
Wiring Diagram .................................................... 1351
Diagnostic Procedure ........................................... 1352
Component Inspection ......................................... 1354
VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) ..................................................................... 1355
Description ........................................................... 1355
CONSULT-II Reference Value in Data Monitor Mode 1356
Wiring Diagram .................................................... 1357
Diagnostic Procedure ........................................... 1359
Component Inspection ......................................... 1362
Removal and Installation ...................................... 1363
MIL AND DATA LINK CONNECTOR ..................... 1364
Wiring Diagram .................................................... 1364
SERVICE DATA AND SPECIFICATIONS (SDS) ... 1366
Fuel Pressure ....................................................... 1366
Idle Speed and Ignition Timing ............................. 1366
Calculated Load Value ......................................... 1366
Mass Air Flow Sensor .......................................... 1366
Intake Air Temperature Sensor ............................ 1366
Engine Coolant Temperature Sensor ................... 1366
Fuel Tank Temperature Sensor ............................ 1366
Crankshaft Position Sensor (POS) ...................... 1366
Camshaft Position Sensor (PHASE) .................... 1366
A/F Sensor 1 Heater ............................................ 1366
Heated Oxygen sensor 2 Heater ......................... 1367
Throttle Control Motor .......................................... 1367
Fuel Injector ......................................................... 1367
Fuel Pump ............................................................ 1367

ON BOARD DIAGNOSTIC (OBD) SYSTEM EC-65
[VQ35DE]
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EC
Revision: 2006 July 2007 FX35/FX45
Item Self-diagnostic test item DTC Test value
(GST display) Test limit Conversion
TID CID
CATALYST Three way catalyst function (Bank 1)
P0420 01H 01H Max. 1/128
P0420 02H 81H Min. 1
Three way catalyst function (Bank 2) P0430 03H 02H Max. 1/128
P0430 04H 82H Min. 1
EVAP SYSTEM EVAP control system (Small leak) P0442 05H 03H Max.
1/128mm
2
EVAP control system purge flow monitoring P0441 06H 83H Min. 20mV
EVAP control system (Very small leak) P0456 07H 03H Max. 1/128mm
2
HO2S Air fuel ratio (A/F) sensor 1 (Bank 1)
P0131 41H 8EH Min. 5 mV
P0132 42H 0EH Max. 5 mV
P2A00 43H 0EH Max. 0.002
P2A00 44H 8EH Min. 0.002 P0133 45H 8EH Min. 0.004
P0130 46H 0EH Max. 5 mV
P0130 47H 8EH Min. 5 mV
P0133 48H 8EH Min. 0.004
Air fuel ratio (A/F) sensor 1 (Bank 2) P0151 4CH 8FH Min. 5 mV
P0152 4DH 0FH Max. 5 mV
P2A03 4EH 0FH Max. 0.002
P2A03 4FH 8FH Min. 0.002 P0153 50H 8FH Min. 0.004
P0150 51H 0FH Max. 5 mV
P0150 52H 8FH Min. 5 mV
P0153 53H 8FH Min. 0.004
Heated oxygen sensor 2 (Bank 1) P0139 19H 86H Min. 10mV/500ms
P0137 1AH 86H Min. 10mV
P0138 1BH 06H Max. 10mV
P0138 1CH 06H Max. 10mV
Heated oxygen sensor 2 (Bank 2) P0159 21H 87H Min. 10mV/500ms
P0157 22H 87H Min. 10mV
P0158 23H 07H Max. 10mV
P0158 24H 07H Max. 10mV
HO2S HTR Air fuel ratio (A/F) sensor 1 heater (Bank 1)
P0032 57H 10H Max. 5 mV
P0031 58H 90H Min. 5 mV
Air fuel ratio (A/F) sensor 1 heater (Bank 2) P0052 59H 11H Max. 5 mV
P0051 5AH 91H Min. 5 mV
Heated oxygen sensor 2 heater (Bank 1) P0038 2DH 0AH Max. 20mV
P0037 2EH 8AH Min. 20mV
Heated oxygen sensor 2 heater (Bank 2) P0058 2FH 0BH Max. 20mV
P0057 30H 8BH Min. 20mV

EC-94
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2006 July 2007 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

P1421 COLD START CONTROL

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-109
[VQ35DE]
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EC
Revision: 2006 July 2007 FX35/FX45
ECM Harness Connector Terminal LayoutNBS003M4
ECM Terminals and Reference ValueNBS003M5
PREPARATION
ECM is located behind the passenger side instrument lower panel.
For this inspection, remove passenger side instrument lower panel.
ECM INSPECTION TABLE
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
PBIB3368E
PBIB1578E
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
1 B ECM ground [Engine is running]

Idle speedBody ground
2R/L A/F sensor 1 heater
(bank 1) [Engine is running]

Warm-up condition

Idle speed Approximately 5V
3R Throttle control motor relay
power supply [Ignition switch: ON] BATTERY VOLTAGE
(11 - 14V)
4L/W Throttle control motor
(Close) [Ignition switch: ON]

Engine stopped

Selector lever: D

Accelerator pedal: Fully released 0 - 14V
PBIB1584E
PBIB1104E

EC-110
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2006 July 2007 FX35/FX45
5L/B Throttle control motor
(Open) [Ignition switch: ON]
Engine stopped

Selector lever: D

Accelerator pedal: Fully depressed 0 - 14V
6R Heated oxygen sensor 2
heater (bank 2) [Engine is running]

Engine speed: Below 3,600 rpm after the
following conditions are met
–Engine: After warming up
–Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for 1
minute under no load 0 - 1.0V
[Ignition switch: ON]

Engine stopped
[Engine is running]

Engine speed: Above 3,600 rpm BATTERY VOLTAGE
(11 - 14V)
10 OR Intake valve timing control
solenoid valve (bank 2) [Engine is running]

Warm-up condition

Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Warm-up condition

When revving engine up to 2,500 rpm
quickly 7 - 12V
11 B R Intake valve timing control
solenoid valve (bank 1) [Engine is running]

Warm-up condition

Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Warm-up condition

When revving engine up to 2,500 rpm
quickly 7 - 12V
12 R/G Power steering pressure
sensor [Engine is running]

Steering wheel: Being turned
0.5 - 4.5V
[Engine is running]

Steering wheel: Not being turned 0.4 - 0.8V
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
PBIB1105E
PBIB1790E
PBIB1790E

EC-112
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2006 July 2007 FX35/FX45
21
22
23 W
G
R Fuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1 [Engine is running]

Warm-up condition

Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle BATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Warm-up condition

Engine speed: 2,000 rpm BATTERY VOLTAGE
(11 - 14V)
24 L A/F sensor 1 heater
(Bank 2) [Engine is running]

Warm-up condition

Idle speed Approximately 5V
25 P Heated oxygen sensor 2
heater (bank 1) [Engine is running]

Engine speed: Below 3,600 rpm after the
following conditions are met
–Engine: After warming up
–Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for 1
minute under no load 0 - 1.0V
[Ignition switch: ON]

Engine stopped
[Engine is running]

Engine speed: Above 3,600 rpm BATTERY VOLTAGE
(11 - 14V)
32 OR EVAP control system pres-
sure sensor [Ignition switch: ON]
Approximately 1.8 - 4.8V
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
SEC984C
SEC985C
PBIB1584E

EC-120
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2006 July 2007 FX35/FX45
X: Applicable
*1: This item includes 1st trip DTCs.
*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-II screen in freeze frame d ata
mode only if a 1st trip DTC or DTC is detected. For details, refer to EC-121, "
Freeze Frame Data and 1st Trip Freeze Frame Data" .
*3: Always “CMPLT” is displayed.
INSPECTION PROCEDURE
Refer to GI-38, "CONSULT-II Start Procedure"
WORK SUPPORT MODE
Work Item
ENGINE CONTROL COMPONENT PARTS
OUTPUT
Fuel injector ×× ×
Power transistor (Ignition timing) ×× ×
Throttle control motor relay ×××
Throttle control motor ×
EVAP canister purge volume con-
trol solenoid valve ×××××
Air conditioner relay ××
Fuel pump relay ××××
Cooling fan relay ××××
Air fuel ratio (A/F) sensor 1 heater ×××
× *
3
Heated oxygen sensor 2 heater ×××
× *3
EVAP canister vent control valve ×× ×××
Intake valve timing control solenoid
valve ××××
Calculated load value ×××
Item
DIAGNOSTIC TEST MODE
WORK SUP-
PORT SELF-DIAGNOSTIC
RESULTS DATA
MONI-
TOR DATA
MONI- TOR
(SPEC) ACTIVE
TEST DTC & SRT
CONFIRMATION
DTC*
1FREEZE
FRAME
DATA*
1
SRT
STATUS DTC
WORK SUP-
PORT
WORK ITEM CONDITION USAGE
FUEL PRESSURE RELEASE

FUEL PUMP WILL STOP BY TOUCHING “START” DUR-
ING IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS. When releasing fuel pressure
from fuel line
IDLE AIR VOL LEARN

THE IDLE AIR VOLUME THAT KEEPS THE ENGINE
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM. When learning the idle air volume
SELF-LEARNING CONT

THE COEFFICIENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT. When clearing the coefficient of
self-learning control value