air condition INFINITI FX35 2004 Service Manual

DI-50
WARNING LAMPS
Revision: 2004 November 2004 FX35/FX45
3. CHECK OIL PRESSURE SWITCH CIRCUIT
1. Disconnect the IPDM E/R connector.
2. Check continuity between IPDM E/R harness connector E9 ter-
minal 57 (BR) and ground.
OK or NG
OK >> Replace IPDM E/R.
NG >> Repair harness or connector.
Component InspectionAKS005NH
OIL PRESSURE SWITCH
Check continuity between oil pressure switch and ground.Continuity should not exist.
SKIA5013E
Condition
Oil pressure kPa (kg/cm2 , psi)Continuity
Engine stopped Less than 29 (0.3, 4) Yes
Engine running More than 29 (0.3, 4) No
ELF0044D

DI-64
WARNING CHIME
Revision: 2004 November 2004 FX35/FX45
Terminals and Reference Value for Combination MeterAKS005NQ
How to Proceed With Trouble DiagnosisAKS005NR
1. Confirm the malfunction symptom or customer complaint.
2. Understand operation description and function description. Refer to DI-55, "
System Description" .
3. Perform the Preliminary Check. Refer to DI-65, "
Preliminary Check" .
4. Start engine.
5. Select “METER A/C AMP” on CONSULT-II, and perform self-diagnosis of unified meter and A/C amp.
Refer to DI-31, "
CONSULT-II Function" .
6. After erasing the self-diagnostic results, perform self-diagnosis again. When no malfunction detected, go
to next step 7. When malfunction detected, go to DI-16, "
Symptom Chart 2" in “COMBINATION METER”.
7. Check symptom and repair or replace the cause of malfunction.
8. Does the warning chime operate normally? If so, go to 9. If not, go to 7.
9. INSPECTION END
Terminal
No.Wire
colorItem Measuring condition
Reference value
Ignition
switchOperation or condition
5
B Ground ON — Approx. 0V
6
7 G/Y Ignition switch ON or START ON — Battery voltage
8 R/W Battery power supply OFF — Battery voltage
9LG/RSeat belt buckle switch
(driver side) ONUnfastened (ON) Approx. 0V
Fastened (OFF) Approx. 12V
13 L/BTX communication line (To
unified meter and A/C amp.)ON —
14 PURX communication line
(From unified meter and A/C
amp.)ON —
15 B Ground ON — Approx. 0V
SKIA3361E
SKIA3362E

DI-70
WARNING CHIME
Revision: 2004 November 2004 FX35/FX45
3. CHECK FRONT DOOR SWITCH (DRIVER SIDE)
Check front door switch (driver side).
OK or NG
OK >> Replace BCM. Refer to BCS-15, "Removal and Installa-
tion of BCM" .
NG >> Replace front door switch (driver side).
Key Warning Chime Does Not Operate (Without Intelligent Key)AKS005NW
1. CHECK FUSE
Check if the key switch 15A fuse [No. 22, located in the fuse block (J/B)] is blown. Refer to DI-59, "
Wiring Dia-
gram — CHIME —" .
Is the fuse blown?
YES >> Replace fuse. Be sure to repair the cause of malfunction before installing new fuse.
NO >> GO TO 2.
2. CHECK WARNING CHIME OPERATION
Check the chime under conditions in exception of key warning chime (without Intelligent Key) operation.
Does warning chime sound?
YES >> GO TO 3.
NO >> Go to DI-68, "
All Warnings Are Not Operated" or DI-69, "Key Warning Chime and Light Warning
Chime Does Not Operate (Seat Belt Warning Chime Does Operate)" . When driver side door
switch is released: Continuity should exist.
When driver side door
switch is pushed: Continuity should not exist.
PKIA3718E

DI-72
WARNING CHIME
Revision: 2004 November 2004 FX35/FX45
5. CHECK KEY SWITCH CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector M3 terminal
37 (B/W) and key switch harness connector M23 terminal 1 (B/
W).
3. Check continuity between BCM harness connector M3 terminal
37 (B/W) and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6. CHECK KEY SWITCH POWER SUPPLY CIRCUIT
Check voltage between key switch harness connector M23 terminal
2 (L/R) and ground.
OK or NG
OK >> Replace BCM. Refer to BCS-15, "Removal and Installa-
tion of BCM" .
NG >> Check harness for open or short between key switch
and fuse.
Key Warning Chime Does Not Operate (With Intelligent Key, When Mechanical
Key Is Used)
AKS0079U
1. CHECK FUSE
Check if the key switch and ignition knob switch 10A fuse (No. 38, located in the fuse and fusible link box) is
blown. Refer to DI-59, "
Wiring Diagram — CHIME —" .
Is the fuse blown?
YES >> Replace fuse. Be sure to repair the cause of malfunction before installing new fuse.
NO >> GO TO 2.
2. CHECK WARNING CHIME OPERATION
Check the chime under conditions in exception of key warning chime (when mechanical key is used) opera-
tion.
Does warning chime sound?
YES >> GO TO 3.
NO >> Go to DI-68, "
All Warnings Are Not Operated" or DI-69, "Key Warning Chime and Light Warning
Chime Does Not Operate (Seat Belt Warning Chime Does Operate)" . Continuity should exist.
Continuity should not exist.
SKIA5050E
Battery voltage should exist.
SKIA5051E

DI-74
WARNING CHIME
Revision: 2004 November 2004 FX35/FX45
6. CHECK KEY SWITCH CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector M3 terminal
37 (B/W) and key switch and ignition knob switch harness con-
nector M22 terminal 4 (B/W).
3. Check continuity between BCM harness connector M3 terminal
37 (B/W) and ground.
OK or NG
OK >> Replace BCM. Refer to BCS-15, "Removal and Installa-
tion of BCM" .
NG >> Repair harness or connector.
Key Warning Chime Does Not Operate (With Intelligent Key, When Intelligent
Key Is Carried With The Driver)
AKS0079V
1. CHECK WARNING CHIME OPERATION
Check the chime under conditions in exception of key warning chime (when Intelligent Key is carried with the
driver) operation.
Does warning chime sound?
YES >> GO TO 2.
NO >> Go to DI-68, "
All Warnings Are Not Operated" or DI-69, "Key Warning Chime and Light Warning
Chime Does Not Operate (Seat Belt Warning Chime Does Operate)" .
2. CHECK INTELLIGENT KEY UNIT SELF-DIAGNOSTIC
Perform the Intelligent Key unit self-diagnosis. Refer to BL-114, "
CONSULT-II Functions" .
OK or NG
OK >> GO TO 3.
NG >> Check the applicable parts.Continuity should exist.
Continuity should not exist.
SKIA5062E

DI-76
WARNING CHIME
Revision: 2004 November 2004 FX35/FX45
6. CHECK IGNITION KNOB SWITCH CIRCUIT
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit harness connector
M34 terminal 27 (L/W) and key switch and ignition knob switch
harness connector M22 terminal 2 (L/W).
3. Check continuity between Intelligent Key unit harness connector
M34 terminal 27 (L/W) and ground.
OK or NG
OK >> Replace Intelligent Key unit. Refer to BL-146, "Removal
and Installation of Intelligent Key Unit" .
NG >> Repair harness or connector.
Light Warning Chime Does Not OperateAKS007OJ
1. CHECK WARNING CHIME OPERATION
Check the chime under conditions in exception of light warning chime operation.
Dose warning chime sound?
YES >> GO TO 2.
NO >> Go to DI-68, "
All Warnings Are Not Operated" .
2. CHECK BCM INPUT SIGNAL
1. Select “BCM”.
2. With “DATA MONITOR” of “BUZZER”, confirm “TAIL LAMP SW”
when the lighting switch is operated.
OK or NG
OK >> Replace BCM. Refer to BCS-15, "Removal and Installa-
tion of BCM" .
NG >> Check the lighting switch. Refer to LT- 1 0 8 , "
Removal
and Installation" . Continuity should exist.
Continuity should not exist.
SKIA5067E
Lighting switch ON (1st
position): TAIL LAMP SW ON
Lighting switch OFF : TAIL LAMP SW OFF
SKIA2081E

EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
C
D
E
F
G
H
I
J
K
L
M
SECTION EC
A
EC
Revision: 2004 November 2004 FX35/FX45
ENGINE CONTROL SYSTEM
VQ35DE
INDEX FOR DTC ...................................................... 15
Alphabetical Index .................................................. 15
DTC No. Index ....................................................... 19
PRECAUTIONS ........................................................ 23
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................ 23
On Board Diagnostic (OBD) System of Engine and
A/T .......................................................................... 23
Precaution .............................................................. 23
Wiring Diagrams and Trouble Diagnosis ................ 26
PREPARATION ......................................................... 27
Special Service Tools ............................................. 27
Commercial Service Tools ...................................... 28
ENGINE CONTROL SYSTEM .................................. 29
System Diagram ..................................................... 29
Vacuum Hose Drawing ........................................... 30
System Chart ......................................................... 31
Multiport Fuel Injection (MFI) System .................... 32
Electronic Ignition (EI) System ............................... 34
Air Conditioning Cut Control ................................... 35
Fuel Cut Control (at No Load and High Engine
Speed) .................................................................... 35
CAN communication .............................................. 36
BASIC SERVICE PROCEDURE .............................. 37
Idle Speed and Ignition Timing Check .................... 37
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment ............................................................. 38
Accelerator Pedal Released Position Learning ...... 49
Throttle Valve Closed Position Learning ................ 49
Idle Air Volume Learning ........................................ 49
Fuel Pressure Check .............................................. 51
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 53
Introduction ............................................................ 53
Two Trip Detection Logic ........................................ 53
Emission-Related Diagnostic Information .............. 54
IVIS (Infiniti Vehicle Immobilizer System — NATS) ... 68
Malfunction Indicator Lamp (MIL) ........................... 68
OBD System Operation Chart ................................ 72TROUBLE DIAGNOSIS ............................................ 77
Trouble Diagnosis Introduction ............................... 77
DTC Inspection Priority Chart ................................. 80
Fail-Safe Chart ....................................................... 82
Basic Inspection ..................................................... 83
Symptom Matrix Chart ............................................ 88
Engine Control Component Parts Location ............ 92
Circuit Diagram ....................................................... 98
ECM Harness Connector Terminal Layout ...........100
ECM Terminals and Reference Value ...................100
CONSULT-II Function ...........................................109
Generic Scan Tool (GST) Function .......................122
CONSULT-II Reference Value in Data Monitor .....125
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................129
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .131
Description ............................................................131
Testing Condition ..................................................131
Inspection Procedure ............................................131
Diagnostic Procedure ...........................................132
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................135
Description ............................................................135
Diagnostic Procedure ...........................................135
POWER SUPPLY AND GROUND CIRCUIT ...........136
Wiring Diagram .....................................................136
Diagnostic Procedure ...........................................137
Ground Inspection ................................................141
DTC U1000, U1001 CAN COMMUNICATION LINE .142
Description ............................................................142
On Board Diagnosis Logic ....................................142
DTC Confirmation Procedure ...............................142
Wiring Diagram .....................................................143
Diagnostic Procedure ...........................................144
DTC P0011, P0021 IVT CONTROL ........................145
Description ............................................................145
CONSULT-II Reference Value in Data Monitor Mode
.145
On Board Diagnosis Logic ....................................146

EC-8Revision: 2004 November 2004 FX35/FX45 PREPARATION .......................................................674
Special Service Tools ...........................................674
Commercial Service Tools ....................................675
ENGINE CONTROL SYSTEM ................................676
System Diagram ...................................................676
Vacuum Hose Drawing .........................................677
System Chart ........................................................678
Multiport Fuel Injection (MFI) System ...................679
Electronic Ignition (EI) System .............................681
Nissan Torque Demand (NTD) Control System ....682
Air Conditioning Cut Control .................................683
Fuel Cut Control (at No Load and High Engine
Speed) ..................................................................683
CAN communication .............................................684
BASIC SERVICE PROCEDURE .............................685
Idle Speed and Ignition Timing Check ..................685
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment ............................................................687
Accelerator Pedal Released Position Learning ....698
Throttle Valve Closed Position Learning ...............698
Idle Air Volume Learning ......................................698
Fuel Pressure Check ............................................700
ON BOARD DIAGNOSTIC (OBD) SYSTEM ..........703
Introduction ...........................................................703
Two Trip Detection Logic ......................................703
Emission-related Diagnostic Information ..............704
IVIS (Infiniti Vehicle Immobilizer System — NATS) .717
Malfunction Indicator Lamp (MIL) .........................717
OBD System Operation Chart ..............................721
TROUBLE DIAGNOSIS ..........................................726
Trouble Diagnosis Introduction .............................726
DTC Inspection Priority Chart ...............................729
Fail-safe Chart ......................................................731
Basic Inspection ...................................................733
Symptom Matrix Chart ..........................................738
Engine Control Component Parts Location ..........742
Circuit Diagram .....................................................748
ECM Harness Connector Terminal Layout ...........750
ECM Terminals and Reference Value ...................750
CONSULT-II Function ...........................................759
Generic Scan Tool (GST) Function .......................772
CONSULT-II Reference Value in Data Monitor .....775
Major Sensor Reference Graph in Data Monitor
Mode .....................................................................778
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .780
Description ............................................................780
Testing Condition ..................................................780
Inspection Procedure ............................................780
Diagnostic Procedure ...........................................781
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-
DENT .......................................................................784
Description ............................................................784
Diagnostic Procedure ...........................................784
POWER SUPPLY AND GROUND CIRCUIT ...........785
Wiring Diagram .....................................................785
Diagnostic Procedure ...........................................786
Ground Inspection ................................................791
DTC U1000, U1001 CAN COMMUNICATION LINE .792
Description ............................................................792On Board Diagnosis Logic ....................................792
DTC Confirmation Procedure ................................792
Wiring Diagram .....................................................793
Diagnostic Procedure ............................................794
DTC P0011, P0021 IVT CONTROL .........................795
Description ............................................................795
CONSULT-II Reference Value in Data Monitor Mode
.796
On Board Diagnosis Logic ....................................796
DTC Confirmation Procedure ................................797
Wiring Diagram .....................................................798
Diagnostic Procedure ............................................801
Component Inspection ..........................................805
Removal and Installation .......................................805
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER .806
Description ............................................................806
CONSULT-II Reference Value in Data Monitor Mode
.806
On Board Diagnosis Logic ....................................806
DTC Confirmation Procedure ................................807
Wiring Diagram .....................................................808
Diagnostic Procedure ............................................811
Component Inspection ..........................................813
Removal and Installation .......................................813
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .814
Description ............................................................814
CONSULT-II Reference Value in Data Monitor Mode
.814
On Board Diagnosis Logic ....................................814
DTC Confirmation Procedure ................................815
Wiring Diagram .....................................................816
Diagnostic Procedure ............................................819
Component Inspection ..........................................821
Removal and Installation .......................................821
DTC P0101 MAF SENSOR .....................................822
Component Description ........................................822
CONSULT-II Reference Value in Data Monitor Mode
.822
On Board Diagnosis Logic ....................................822
DTC Confirmation Procedure ................................823
Overall Function Check .........................................824
Wiring Diagram .....................................................825
Diagnostic Procedure ............................................826
Component Inspection ..........................................829
Removal and Installation .......................................829
DTC P0102, P0103 MAF SENSOR .........................830
Component Description ........................................830
CONSULT-II Reference Value in Data Monitor Mode
.830
On Board Diagnosis Logic ....................................830
DTC Confirmation Procedure ................................831
Wiring Diagram .....................................................832
Diagnostic Procedure ............................................833
Component Inspection ..........................................836
Removal and Installation .......................................836
DTC P0112, P0113 IAT SENSOR ............................837
Component Description ........................................837
On Board Diagnosis Logic ....................................837
DTC Confirmation Procedure ................................837

ENGINE CONTROL SYSTEM
EC-31
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2004 November 2004 FX35/FX45
System ChartABS006K6
*1: This sensor is not used to control the engine system. This is used only for the on board diagnosis.
*2: This sensor is not used to control the engine system under normal conditions.
*3: This input signal is sent to the ECM through CAN communication line.
*4: This output signal is sent from the ECM through CAN communication line.Input (Sensor) ECM Function Output (Actuator)

Camshaft position sensor (PHASE)

Crankshaft position sensor (POS)

Mass air flow sensor

Engine coolant temperature sensor

Heated oxygen sensor 1

Throttle position sensor

Accelerator pedal position sensor

Park/neutral position (PNP) switch

Intake air temperature sensor

Power steering pressure sensor

Ignition switch

Battery voltage

Knock sensor

Refrigerant pressure sensor

Stop lamp switch

ICC steering switch

ICC brake switch

ASCD steering switch

ASCD brake switch

Fuel level sensor*1 *3

EVAP control system pressure sensor

Fuel tank temperature sensor*1

Heated oxygen sensor 2*2

TCM (Transmission control module)*3

ABS actuator and electric unit (control unit)*3

ICC unit*3

Air conditioner switch*3

Wheel sensor*3

Electrical load signal*3
Fuel injection & mixture ratio control Fuel injector
Electronic ignition system Power transistor
Fuel pump control Fuel pump relay
ICC vehicle speed control Electric throttle control actuator
ASCD vehicle speed control Electric throttle control actuator
On board diagnostic system
MIL (On the instrument panel)*
4
Heated oxygen sensor 1 heater control Heated oxygen sensor 1 heater
Heated oxygen sensor 2 heater control Heated oxygen sensor 2 heater
EVAP canister purge flow controlEVAP canister purge volume control
solenoid valve
Air conditioning cut control
Air conditioner relay*
4
Cooling fan control
Cooling fan relay*4
ON BOARD DIAGNOSIS for EVAP system EVAP canister vent control valve

EC-32
[VQ35DE]
ENGINE CONTROL SYSTEM
Revision: 2004 November 2004 FX35/FX45
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
controlFuel injector Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen 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