2006 INFINITI M35 Motor

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Revision: 2006 January2006 M35/M45 DTC Confirmation Procedure ...............................607
Wiring Diagram ....................................................609
Diagnostic Procedure ...........................................610
DTC P2101 ELECTRIC THROTTLE CONTROL
FUNCTION ..............................................................613
Description ...........................................................613
On Board Diagnosis Logic ...................................613
DTC Confirmation Procedure ...............................613
Wiring Diagram ....................................................614
Diagnostic Procedure ...........................................615
Component Inspection .........................................618
Removal and Installation ......................................618
DTC P2118 THROTTLE CONTROL MOTOR ........619
Component Description ........................................619
On Board Diagnosis Logic ...................................619
DTC Confirmation Procedure ...............................619
Wiring Diagram ....................................................620
Diagnostic Procedure ...........................................621
Component Inspection .........................................622
Removal and Installation ......................................623
DTC P2119 ELECTRIC THROTTLE CONTROL
ACTUATOR ............................................................624
Component Description ........................................624
On Board Diagnosis Logic ...................................624
DTC Confirmation Procedure ...............................624
Diagnostic Procedure ...........................................625
DTC P2122, P2123 APP SENSOR ........................626
Component Description ........................................626
CONSULT-II Reference Value in Data Monitor Mode
.626
On Board Diagnosis Logic ...................................626
DTC Confirmation Procedure ...............................627
Wiring Diagram ....................................................628
Diagnostic Procedure ...........................................629
Component Inspection .........................................631
Removal and Installation ......................................632
DTC P2127, P2128 APP SENSOR ........................633
Component Description ........................................633
CONSULT-II Reference Value in Data Monitor Mode
.633
On Board Diagnosis Logic ...................................633
DTC Confirmation Procedure ...............................634
Wiring Diagram ....................................................635
Diagnostic Procedure ...........................................636
Component Inspection .........................................639
Removal and Installation ......................................639
DTC P2135 TP SENSOR ........................................640
Component Description ........................................640
CONSULT-II Reference Value in Data Monitor Mode
.640
On Board Diagnosis Logic ...................................640
DTC Confirmation Procedure ...............................641
Wiring Diagram ....................................................642
Diagnostic Procedure ...........................................643
Component Inspection .........................................646
Removal and Installation ......................................646
DTC P2138 APP SENSOR .....................................647
Component Description ........................................647
CONSULT-II Reference Value in Data Monitor Mode .647
On Board Diagnosis Logic ....................................647
DTC Confirmation Procedure ...............................648
Wiring Diagram .....................................................649
Diagnostic Procedure ...........................................650
Component Inspection ..........................................654
Removal and Installation ......................................654
DTC P2A00, P2A03 A/F SENSOR 1 ......................655
Component Description ........................................655
CONSULT-II Reference Value in Data Monitor Mode
.655
On Board Diagnosis Logic ....................................655
DTC Confirmation Procedure ...............................655
Wiring Diagram .....................................................657
Diagnostic Procedure ...........................................660
Removal and Installation ......................................665
IGNITION SIGNAL ..................................................666
Component Description ........................................666
Wiring Diagram .....................................................667
Diagnostic Procedure ...........................................672
Component Inspection ..........................................677
Removal and Installation ......................................678
FUEL INJECTOR ....................................................679
Component Description ........................................679
CONSULT-II Reference Value in Data Monitor Mode
.679
Wiring Diagram .....................................................680
Diagnostic Procedure ...........................................681
Component Inspection ..........................................684
Removal and Installation ......................................684
FUEL PUMP ............................................................685
Description ............................................................685
CONSULT-II Reference Value in Data Monitor Mode
.685
Wiring Diagram .....................................................686
Diagnostic Procedure ...........................................687
Component Inspection ..........................................691
Removal and Installation ......................................691
REFRIGERANT PRESSURE SENSOR ..................692
Component Description ........................................692
Wiring Diagram .....................................................693
Diagnostic Procedure ...........................................694
Removal and Installation ......................................696
ELECTRICAL LOAD SIGNAL ................................697
Description ............................................................697
CONSULT-II Reference Value in Data Monitor Mode
.697
Diagnostic Procedure ...........................................697
ICC BRAKE SWITCH .............................................699
Component Description ........................................699
CONSULT-II Reference Value in Data Monitor Mode
.699
Wiring Diagram .....................................................700
Diagnostic Procedure ...........................................701
Component Inspection ..........................................705
ASCD BRAKE SWITCH .........................................707
Component Description ........................................707
CONSULT-II Reference Value in Data Monitor Mode
.707

EC-8Revision: 2006 January2006 M35/M45 Wiring Diagram .....................................................708
Diagnostic Procedure ...........................................709
Component Inspection ..........................................713
ASCD INDICATOR .................................................
.714
Component Description ........................................714
CONSULT-II Reference Value in Data Monitor Mode
.714
Wiring Diagram .....................................................715
Diagnostic Procedure ...........................................716
SNOW MODE SWITCH ...........................................717
Description ............................................................717
CONSULT-II Reference Value in the Data Monitor
Mode .....................................................................717
Wiring Diagram .....................................................718
Diagnostic Procedure ...........................................719
Component Inspection ..........................................721
MIL AND DATA LINK CONNECTOR ......................722
Wiring Diagram .....................................................722
SERVICE DATA AND SPECIFICATIONS (SDS) ....724
Fuel Pressure .......................................................724
Idle Speed and Ignition Timing .............................724
Calculated Load Value ..........................................724
Mass Air Flow Sensor ...........................................724
Intake Air Temperature Sensor .............................724
Engine Coolant Temperature Sensor ...................724
Fuel Tank Temperature Sensor ............................724
Crankshaft Position Sensor (POS) .......................724
Camshaft Position Sensor (PHASE) ....................724
A/F Sensor 1 Heater ............................................ .724
Heated Oxygen Sensor 2 Heater .........................725
Throttle Control Motor ...........................................725
Fuel Injector ..........................................................725
Fuel Pump ............................................................725
VK45DE
INDEX FOR DTC .....................................................726
DTC No. Index ......................................................726
Alphabetical Index ................................................730
PRECAUTIONS .......................................................734
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................734
Precautions for Procedures without Cowl Top Cover .734
On Board Diagnostic (OBD) System of Engine and
A/T ........................................................................734
Precaution ............................................................735
PREPARATION .......................................................738
Special Service Tools ...........................................738
Commercial Service Tools ....................................739
ENGINE CONTROL SYSTEM ................................740
System Diagram ...................................................740
Multiport Fuel Injection (MFI) System ...................741
Electronic Ignition (EI) System .............................743
Fuel Cut Control (At No Load and High Engine
Speed) ..................................................................744
AIR CONDITIONING CUT CONTROL ....................745
Input/Output Signal Chart .....................................745
System Description ...............................................745AUTOMATIC SPEED CONTROL DEVICE (ASCD) .746
System Description ...............................................746
Component Description ........................................747
CAN COMMUNICATION .........................................748
System Description ...............................................748
EVAPORATIVE EMISSION SYSTEM .....................749
Description ............................................................749
Component Inspection ..........................................752
Removal and Installation .......................................753
How to Detect Fuel Vapor Leakage ......................753
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ....................................................................756
System Description ...............................................756
Diagnostic Procedure ............................................757
Component Inspection ..........................................759
POSITIVE CRANKCASE VENTILATION ................761
Description ............................................................761
Component Inspection ..........................................761
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ......................................................................763
Description ............................................................763
ON BOARD DIAGNOSTIC (OBD) SYSTEM ...........764
Introduction ..........................................................
.764
Two Trip Detection Logic .......................................764
Emission-Related Diagnostic Information .............765
Malfunction Indicator Lamp (MIL) .........................780
OBD System Operation Chart ...............................782
BASIC SERVICE PROCEDURE .............................788
Basic Inspection ....................................................788
Idle Speed and Ignition Timing Check ..................793
Idle Mixture Ratio Adjustment ...............................795
VIN Registration ....................................................806
Accelerator Pedal Released Position Learning .....806
Throttle Valve Closed Position Learning ...............806
Idle Air Volume Learning .......................................807
Fuel Pressure Check ............................................809
TROUBLE DIAGNOSIS ..........................................811
Trouble Diagnosis Introduction .............................811
DTC Inspection Priority Chart ...............................817
Fail-Safe Chart ......................................................819
Symptom Matrix Chart ..........................................820
Engine Control Component Parts Location ...........824
Vacuum Hose Drawing .........................................833
Circuit Diagram .....................................................834
ECM Harness Connector Terminal Layout ............836
ECM Terminals and Reference Value ...................836
CONSULT-II Function (ENGINE) ..........................846
Generic Scan Tool (GST) Function .......................859
CONSULT-II Reference Value in Data Monitor .....862
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................866
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .868
Description ............................................................868
Testing Condition ..................................................868
Inspection Procedure ...........................................
.868
Diagnostic Procedure ............................................869
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-

EC-14Revision: 2006 January2006 M35/M45 Wiring Diagram ....................................................1325
Diagnostic Procedure ..........................................1326
Component Inspection .........................................1327
Removal and Installation .....................................1328
DTC P1805 BRAKE SWITCH ................................1329
Component Description .......................................1329
CONSULT-II Reference Value in Data Monitor Mode
1329
On Board Diagnosis Logic ...................................1329
DTC Confirmation Procedure ..............................1330
Wiring Diagram ....................................................1331
Diagnostic Procedure ..........................................1332
Component Inspection .........................................1337
DTC P2100, P2103 THROTTLE CONTROL MOTOR
RELAY ....................................................................1338
Component Description .......................................1338
CONSULT-II Reference Value in Data Monitor Mode
1338
On Board Diagnosis Logic ...................................1338
DTC Confirmation Procedure ..............................1338
Wiring Diagram ....................................................1340
Diagnostic Procedure ..........................................1341
DTC P2101 ELECTRIC THROTTLE CONTROL
FUNCTION .............................................................1344
Description ...........................................................1344
On Board Diagnosis Logic ...................................1344
DTC Confirmation Procedure ..............................1344
Wiring Diagram ....................................................1345
Diagnostic Procedure ..........................................1346
Component Inspection .........................................1350
Removal and Installation .....................................1350
DTC P2118 THROTTLE CONTROL MOTOR ........1351
Component Description .......................................1351
On Board Diagnosis Logic ...................................1351
DTC Confirmation Procedure ..............................1351
Wiring Diagram ....................................................1352
Diagnostic Procedure ..........................................1353
Component Inspection .........................................1354
Removal and Installation .....................................1355
DTC P2119 ELECTRIC THROTTLE CONTROL
ACTUATOR ............................................................1356
Component Description .......................................1356
On Board Diagnosis Logic ...................................1356
DTC Confirmation Procedure ..............................1356
Diagnostic Procedure ..........................................1357
DTC P2122, P2123 APP SENSOR ........................1358
Component Description .......................................1358
CONSULT-II Reference Value in Data Monitor Mode
1358
On Board Diagnosis Logic ...................................1358
DTC Confirmation Procedure ..............................1359
Wiring Diagram ....................................................1360
Diagnostic Procedure ..........................................1361
Component Inspection .........................................1363
Removal and Installation .....................................1364
DTC P2127, P2128 APP SENSOR ........................1365
Component Description .......................................1365
CONSULT-II Reference Value in Data Monitor Mode
1365On Board Diagnosis Logic ...................................1365
DTC Confirmation Procedure ...............................1366
Wiring Diagram ....................................................1367
Diagnostic Procedure ........................................... 1368
Component Inspection .........................................1371
Removal and Installation ......................................1371
DTC P2135 TP SENSOR .......................................1372
Component Description .......................................1372
CONSULT-II Reference Value in Data Monitor Mode
1372
On Board Diagnosis Logic ...................................1372
DTC Confirmation Procedure ...............................1373
Wiring Diagram ....................................................1374
Diagnostic Procedure ........................................... 1375
Component Inspection .........................................1378
Removal and Installation ......................................1378
DTC P2138 APP SENSOR .....................................1379
Component Description .......................................1379
CONSULT-II Reference Value in Data Monitor Mode
1379
On Board Diagnosis Logic ...................................1379
DTC Confirmation Procedure ...............................1380
Wiring Diagram ....................................................1381
Diagnostic Procedure ........................................... 1382
Component Inspection .........................................1386
Removal and Installation ......................................1386
DTC P2A00, P2A03 A/F SENSOR 1 ......................1387
Component Description .......................................1387
CONSULT-II Reference Value in Data Monitor Mode
1387
On Board Diagnosis Logic ...................................1387
DTC Confirmation Procedure ...............................1387
Wiring Diagram ....................................................1389
Diagnostic Procedure ........................................... 1392
Removal and Installation ......................................1397
VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) .....................................................................1398
Description ...........................................................1398
CONSULT-II Reference Value in Data Monitor Mode
1399
Wiring Diagram ....................................................1400
Diagnostic Procedure ...........................................
1402
Component Inspection .........................................1405
Removal and Installation ......................................1406
IGNITION SIGNAL .................................................1407
Component Description .......................................1407
Wiring Diagram ....................................................1408
Diagnostic Procedure ........................................... 1413
Component Inspection .........................................1417
Removal and Installation ......................................1419
FUEL INJECTOR ....................................................1420
Component Description .......................................1420
CONSULT-II Reference Value in Data Monitor Mode
1420
Wiring Diagram ....................................................1421
Diagnostic Procedure ........................................... 1422
Component Inspection .........................................1426
Removal and Installation ......................................1426

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Revision: 2006 January2006 M35/M45 FUEL PUMP ..........................................................1427
Description ..........................................................1427
CONSULT-II Reference Value in Data Monitor Mode
1427
Wiring Diagram ...................................................1428
Diagnostic Procedure ..........................................1429
Component Inspection ........................................1433
Removal and Installation .....................................1433
REFRIGERANT PRESSURE SENSOR ................1434
Component Description .......................................1434
Wiring Diagram ...................................................1435
Diagnostic Procedure ..........................................1436
Removal and Installation .....................................1438
ELECTRICAL LOAD SIGNAL ...............................1439
Description ..........................................................1439
CONSULT-II Reference Value in Data Monitor Mode
1439
Diagnostic Procedure ..........................................1439
ICC BRAKE SWITCH ............................................1441
Component Description .......................................1441
CONSULT-II Reference Value in Data Monitor Mode
1441
Wiring Diagram ...................................................1442
Diagnostic Procedure ..........................................1443
Component Inspection ........................................1447
ASCD BRAKE SWITCH ........................................1449
Component Description .......................................1449
CONSULT-II Reference Value in Data Monitor Mode 1449
Wiring Diagram ....................................................1450
Diagnostic Procedure ..........................................1451
Component Inspection .........................................1455
ASCD INDICATOR ................................................. 1456
Component Description .......................................1456
CONSULT-II Reference Value in Data Monitor Mode
1456
Wiring Diagram ....................................................1457
Diagnostic Procedure ..........................................1458
MIL AND DATA LINK CONNECTOR .....................1459
Wiring Diagram ....................................................1459
SERVICE DATA AND SPECIFICATIONS (SDS) ...1461
Fuel Pressure ......................................................1461
Idle Speed and Ignition Timing ............................1461
Calculated Load Value .........................................1461
Mass Air Flow Sensor ..........................................1461
Intake Air Temperature Sensor ............................1461
Engine Coolant Temperature Sensor ..................1461
Fuel Tank Temperature Sensor ...........................1461
Crankshaft Position Sensor (POS) ......................1461
Camshaft Position Sensor (PHASE) ...................1461
A/F Sensor 1 Heater ............................................ 1461
Heated Oxygen Sensor 2 Heater ........................1462
Throttle Control Motor ..........................................1462
Fuel Injector .........................................................1462
Fuel Pump ...........................................................1462

TROUBLE DIAGNOSIS
EC-107
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Revision: 2006 January2006 M35/M45
*: With ICC models2
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 P0725 P0740 P0744 P0745 P1705 P1715 P1730 P1752 P1754 P1757 P1759 P1762 P1764
P1767 P1769 P1772 P1774 A/T related sensors, solenoid valves and switches
P1217 Engine over temperature (OVERHEAT)
P1220 Fuel pump control module
P1805 Brake switch
P2100 P2103 Throttle control motor relay
P2101 Electric throttle control function
P2118 Throttle control motor
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 P0456 EVAP control system (SMALL LEAK, VERY SMALL LEAK)
P0455 EVAP control system (GROSS 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 value*
P1572 ICC brake switch / ASCD brake switch
P1574 ICC vehicle speed sensor / ASCD vehicle speed sensor
P2119 Electric throttle control actuator Priority Detected items (DTC)

EC-108
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Fail-Safe ChartNBS004T0
When the DTC listed below is detected, the ECM enters fail-safe mode and the MIL lights up.
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.
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands
the driver to repair the malfunction.
DTC No. Detected items Engine operating condition in fail-safe mode
P0102
P0103Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0117
P0118Engine coolant tempera-
ture sensor circuitEngine coolant temperature will be determined by ECM based on the time after turning
ignition switch ON or START.
CONSULT-II displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided
(CONSULT-II display)
Just as ignition switch is turned
ON or START40
C (104F)
More than approx. 4 minutes after
ignition ON or START80
C (176F)
Except as shown above40 - 80
C (104 - 176F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
P0643 Sensor power supply ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2100
P2103Throttle control motor relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2101 Electric throttle control
functionECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2118 Throttle control motor ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2119 Electric throttle control
actuator(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.
(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator by regulating the throttle opening to 20
degrees or less.
(When ECM detects the throttle valve is stuck open:)
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops,
the engine stalls.
The engine can restart in N or P position, and engine speed will not exceed 1,000 rpm or
more.
P2122
P2123
P2127
P2128
P2138Accelerator pedal position
sensorThe ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut

TROUBLE DIAGNOSIS
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Revision: 2006 January2006 M35/M45
Engine Control Component Parts LocationNBS004T2
1. IPDM E/R 2. ICC brake hold relay
(ICC models only)3. Battery current sensor
4. Cooling fan relay 5. Power steering pressure sensor 6. Refrigerant pressure sensor
7. Intake valve timing control solenoid
valve (bank 1)8. Cooling fan motor-2 9. Cooling fan control module
10. Intake valve timing control solenoid
valve (bank 2)11. Cooling fan motor-1 12. Mass air flow sensor
(with intake air temperature sensor)
13. Ignition coil (with power transistor)
and spark plug (bank 2)14. Camshaft position sensor (PHASE)
(Bank 2)15. Electric throttle control actuator
16. Fuel injector (bank 2) 17. Knock sensor 18. Fuel injector (bank 1)
19. EVAP canister purge volume con-
trol solenoid valve20. Camshaft position sensor (PHASE)
(Bank 1)21. Engine coolant temperature sensor
22. Ignition coil (with power transistor)
and spark plug (bank 1)23. EVAP service port
PBIB2781E

EC-114
[VQ35DE]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
: Vehicle front
1. Mass air flow sensor (With intake air
temperature sensor)2. Electric throttle control actuator 3. Cooling fan motor-2 harness con-
nector
4. Cooling fan motor-1 harness con-
nector5. Cooling fan control module 6. Refrigerant pressure sensor har-
ness connector
7. PCV valve 8. Engine coolant temperature sensor
harness connector9. Fuel dumper
PBIB2787E