2004 INFINITI FX35 brake system

BRC-60
[VDC/TCS/ABS]
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Revision: 2004 November 2004 FX35/FX45
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)PFP:47660
Removal and InstallationAFS001Z5
REMOVAL
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Loosen brake tube flare nuts, then remove brake tubes from ABS actuator and electric unit (control unit).
3. Remove LH side fender protector. Refer to EI-25, "
FENDER PROTECTOR" .
4. Remove ABS actuator and electric unit (control unit) mounting nuts.
5. Remove ABS actuator and electric unit (control unit) from vehicle.
CAUTION:
Be careful of the following when removing ABS actuator and electric unit (control unit).

If the part number on the part number label (pasted on actuator upper surface) is the same, ABS
actuator and electric unit (control unit) cannot be used on another vehicle.
If it is used on another vehicle, ABS warning lamp, SLIP indicator lamp and VDC OFF indicator
lamp may turn ON or VDC/TCS/ABS may not operate normally.
When replacing ABS actuator and electric unit (control unit), must use new service parts.

Before servicing, disconnect battery cables.

To remove brake tube, use a flare nut wrench to prevent flare nuts and brake tube from being dam-
aged. To install, use a flare nut torque wrench (commercial service tool) and tighten to the speci-
fied torque.

Do not apply excessive impact to actuator, such as dropping it.

Do not remove and install ABS actuator and electric unit (control unit) by holding harness.
INSTALLATION
To install, follow procedure for removal in reverse order.
CAUTION:
Be careful of the following when installing ABS actuator and electric unit (control unit).

Tighten the mounting bolts and nuts to the specified torque.

After the work, bleed air from brake piping. Refer to BR-10, "Bleeding Brake System" .
PFIA0601E

CO-8
[VQ35DE]
OVERHEATING CAUSE ANALYSIS
Revision: 2004 November 2004 FX35/FX45
Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system mal-
function
— Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper —
— Blocked radiator grilleInstalled car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser
Blocked air flow
Installed large fog lamp Symptom Check items

OVERHEATING CAUSE ANALYSIS
CO-33
[VK45DE]
C
D
E
F
G
H
I
J
K
L
MA
CO
Revision: 2004 November 2004 FX35/FX45
Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system mal-
function
— Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper —
— Blocked radiator grilleInstalled car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser
Blocked air flow
Installed large fog lamp Symptom Check items

DI-28
UNIFIED METER AND A/C AMP
Revision: 2004 November 2004 FX35/FX45
UNIFIED METER AND A/C AMPPFP:27760
System DescriptionAKS005N8

For the unified meter and A/C amp., the signal required for controlling the combination meter are inte-
grated in the A/C auto amp.

Unified meter and A/C amp. controls each operation for A/C auto amp. For information regarding A/C con-
trol, refer to AT C - 3 0 , "
AIR CONDITIONER CONTROL" in ATC section.

Unified meter and A/C amp. inputs necessary information for combination meter from each unit by CAN
communication and so on.

And unified meter and A/C amp. outputs these signals using communication line (TX, RX) between unified
meter and A/C amp. and combination meter.

The signals required for the distance to empty (DTE) display are centralized in the unified meter and A/C
amp., converted into data, and sent to the display unit (without NAVI) display control unit (with NAVI) using
CAN communication.

Other input signals are also sent to the ECM, TCM, AWD control unit, BCM, display unit (without NAVI)
and display control unit (with NAVI) using CAN communication.

The unified meter and A/C amp. have a CONSULT-II function (self-diagnostic results, CAN diagnostic
support monitor, data monitor).
INPUT/OUTPUT SIGNALS
Between Unified Meter & A/C amp. and Combination Meter
Unit Input Output
Unified meter and A/C amp.

Seat belt buckle switch signal (Driver's side)

Parking brake signal

Illumination control nighttime required signal

Refuel status signal

Low-fuel warning lamp condition signal

Combination meter receive error signal

Delivery destination data signal

Combination meter specifications signal

Vehicle speed signal (8-pulse)

Engine speed signal

Engine coolant temperature signal

Fuel level sensor signal (resistance value)

Malfunction indicator lamp signal

ABS warning lamp signal

Low tire pressure warning lamp signal

Brake warning lamp signal

A/T CHECK warning lamp signal

ICC warning lamp signal

Oil pressure switch signal

Door switch signal

AWD warning lamp signal

VDC OFF indicator lamp signal

SLIP indicator lamp signal

ASCD CRUISE indicator lamp signal

ASCD SET indicator lamp signal

High beam request signal

Turn indicator signal

Snow mode switch signal

ICC system display signal

A/T position indicator signal

Manual mode indicator signal

Manual mode gear position signal

CAN communication condition signal of A/T

Position lights request signal

Buzzer output signal

UNIFIED METER AND A/C AMP
DI-29
C
D
E
F
G
H
I
J
L
MA
B
DI
Revision: 2004 November 2004 FX35/FX45
FA I L - S A F E
Solution When Communication Error Between the Unified Meter & A/C Amp. and the Combi-
nation Meter
CAN Communication System DescriptionAKS007Z1
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitAKS007YX
Refer to LAN-6, "CAN Communication Unit" in “LAN SYSTEM”.
Function Specifications
Speedometer
Reset to zero by suspending communication. Tachometer
Fuel gauge
Water temperature gauge
Illumination control Combination meter illumination When suspending communication, change to nighttime mode.
Odo/trip meter Integrate in response to 8-pulse input.
A/T position indicator The display turns off by suspending communication.
Warning buzzer The warning buzzer turns off by suspending communication.
Warning lamp/indicator lampABS warning lamp
The lamp turns on by suspending communication. VDC OFF indicator
SLIP indicator
Brake warning lamp
Door warning lamp
The lamp turns off by suspending communication. Low tire pressure warning lamp
ASCD SET indicator lamp
ASCD CRUISE indicator lamp
AWD warning lamp
ICC warning lamp
A/T CHECK warning lamp
Oil pressure warning lamp
Snow mode indicator lamp
Turn signal indicator
Malfunction indicator lamp
High beam indicator

EC-7
C
D
E
F
G
H
I
J
K
L
M
ECA
Revision: 2004 November 2004 FX35/FX45Component Inspection ......................................... 575
Removal and Installation ...................................... 575
DTC P2138 APP SENSOR ..................................... 576
Component Description ........................................ 576
CONSULT-II Reference Value in Data Monitor Mode
. 576
On Board Diagnosis Logic ................................... 576
DTC Confirmation Procedure ............................... 577
Wiring Diagram .................................................... 578
Diagnostic Procedure ........................................... 579
Component Inspection ......................................... 584
Removal and Installation ...................................... 584
IGNITION SIGNAL .................................................. 585
Component Description ........................................ 585
Wiring Diagram .................................................... 586
Diagnostic Procedure ........................................... 591
Component Inspection ......................................... 595
Removal and Installation ...................................... 596
INJECTOR CIRCUIT ............................................... 597
Component Description ........................................ 597
CONSULT-II Reference Value in Data Monitor Mode
. 597
Wiring Diagram .................................................... 598
Diagnostic Procedure ........................................... 599
Component Inspection ......................................... 602
Removal and Installation ...................................... 602
FUEL PUMP CIRCUIT ............................................ 603
Description ........................................................... 603
CONSULT-II Reference Value in Data Monitor Mode
. 603
Wiring Diagram .................................................... 604
Diagnostic Procedure ........................................... 605
Component Inspection ......................................... 608
Removal and Installation ...................................... 608
REFRIGERANT PRESSURE SENSOR ................. 609
Component Description ........................................ 609
Wiring Diagram .................................................... 610
Diagnostic Procedure ............................................ 611
Removal and Installation ...................................... 613
ELECTRICAL LOAD SIGNAL ................................ 614
Description ........................................................... 614
CONSULT-II Reference Value in Data Monitor Mode
. 614
Diagnostic Procedure ........................................... 614
ICC BRAKE SWITCH ............................................. 615
Component Description ........................................ 615
CONSULT-II Reference Value in Data Monitor Mode
. 615
Wiring Diagram .................................................... 616
Diagnostic Procedure ........................................... 617
Component Inspection ......................................... 622
ASCD BRAKE SWITCH ......................................... 624
Component Description ........................................ 624
CONSULT-II Reference Value in Data Monitor Mode
. 624
Wiring Diagram .................................................... 625
Diagnostic Procedure ........................................... 626
Component Inspection ......................................... 631ASCD INDICATOR ..................................................632
Component Description ........................................632
CONSULT-II Reference Value in Data Monitor Mode
.632
Wiring Diagram .....................................................633
Diagnostic Procedure ...........................................634
SNOW MODE SWITCH ..........................................635
Description ............................................................635
CONSULT-II Reference Value in the Data Monitor
Mode .....................................................................635
Wiring Diagram .....................................................636
Diagnostic Procedure ...........................................637
Component Inspection ..........................................640
MIL AND DATA LINK CONNECTOR ......................641
Wiring Diagram .....................................................641
EVAPORATIVE EMISSION SYSTEM .....................643
Description ............................................................643
Component Inspection ..........................................646
Removal and Installation ......................................647
How to Detect Fuel Vapor Leakage ......................647
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ....................................................................650
System Description ...............................................650
Diagnostic Procedure ...........................................651
Component Inspection ..........................................653
POSITIVE CRANKCASE VENTILATION ...............655
Description ............................................................655
Component Inspection ..........................................655
AUTOMATIC SPEED CONTROL DEVICE (ASCD) .657
System Description ...............................................657
Component Description ........................................659
SERVICE DATA AND SPECIFICATIONS (SDS) ....660
Fuel Pressure .......................................................660
Idle Speed and Ignition Timing .............................660
Calculated Load Value ..........................................660
Mass Air Flow Sensor ...........................................660
Intake Air Temperature Sensor .............................660
Engine Coolant Temperature Sensor ...................660
Heated Oxygen Sensor 1 Heater .........................660
Heated Oxygen sensor 2 Heater ..........................660
Crankshaft Position Sensor (POS) .......................660
Camshaft Position Sensor (PHASE) ....................660
Throttle Control Motor ...........................................660
Injector ..................................................................661
Fuel Pump ............................................................661
VK45DE
INDEX FOR DTC .....................................................662
Alphabetical Index ................................................662
DTC No. Index ......................................................665
PRECAUTIONS ......................................................670
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ...............................................................670
On Board Diagnostic (OBD) System of Engine and
A/T ........................................................................670
Precaution ............................................................670
Wiring Diagrams and Trouble Diagnosis ..............673

EC-13
C
D
E
F
G
H
I
J
K
L
M
ECA
Revision: 2004 November 2004 FX35/FX45Wiring Diagram ...................................................1176
Diagnostic Procedure ..........................................1177
Component Inspection ........................................1180
DTC P1564 ASCD STEERING SWITCH ...............1181
Component Description .......................................1181
CONSULT-II Reference Value in Data Monitor Mode
1181
On Board Diagnosis Logic ..................................1181
DTC Confirmation Procedure ..............................1182
Wiring Diagram ...................................................1183
Diagnostic Procedure ..........................................1184
Component Inspection ........................................1187
DTC P1568 ICC FUNCTION ..................................1188
On Board Diagnosis Logic ..................................1188
DTC Confirmation Procedure ..............................1188
Diagnostic Procedure ..........................................1188
DTC P1572 ICC BRAKE SWITCH ........................1189
Component Description .......................................1189
CONSULT-II Reference Value in Data Monitor Mode
1189
On Board Diagnosis Logic ..................................1189
DTC Confirmation Procedure ..............................1190
Wiring Diagram ...................................................1191
Diagnostic Procedure ..........................................1192
Component Inspection ........................................1197
DTC P1572 ASCD BRAKE SWITCH ....................1199
Component Description .......................................1199
CONSULT-II Reference Value in Data Monitor Mode
1199
On Board Diagnosis Logic ..................................1199
DTC Confirmation Procedure ..............................1200
Wiring Diagram ...................................................1201
Diagnostic Procedure ..........................................1202
Component Inspection ........................................1206
DTC P1574 ICC VEHICLE SPEED SENSOR .......1207
Component Description .......................................1207
On Board Diagnosis Logic ..................................1207
DTC Confirmation Procedure ..............................1207
Diagnostic Procedure ..........................................1208
DTC P1574 ASCD VEHICLE SPEED SENSOR ...1209
Component Description .......................................1209
On Board Diagnosis Logic ..................................1209
DTC Confirmation Procedure ..............................1209
Diagnostic Procedure ..........................................1210
DTC P1706 PNP SWITCH .....................................1211
Component Description .......................................1211
CONSULT-II Reference Value in Data Monitor Mode
1211
On Board Diagnosis Logic ..................................1211
DTC Confirmation Procedure ..............................1211
Overall Function Check .......................................1212
Wiring Diagram ...................................................1213
Diagnostic Procedure ..........................................1214
DTC P1720 VEHICLE SPEED SENSOR (A/T OUT-
PUT) .......................................................................1216
Description ..........................................................1216
CONSULT-II Reference Value in Data Monitor Mode
1216
On Board Diagnosis Logic ..................................1216DTC Confirmation Procedure ..............................1216
Diagnostic Procedure ..........................................1217
DTC P1780 SHIFT CHANGE SIGNAL ..................1218
Description ...........................................................1218
On Board Diagnosis Logic ...................................1218
DTC Confirmation Procedure ..............................1218
Diagnostic Procedure ..........................................1218
DTC P1805 BRAKE SWITCH ................................1220
Description ...........................................................1220
CONSULT-II Reference Value in Data Monitor Mode
1220
On Board Diagnosis Logic ...................................1220
DTC Confirmation Procedure ..............................1220
Wiring Diagram ....................................................1221
Diagnostic Procedure ..........................................1222
Component Inspection .........................................1224
DTC P2122, P2123 APP SENSOR ........................1225
Component Description .......................................1225
CONSULT-II Reference Value in Data Monitor Mode
1225
On Board Diagnosis Logic ...................................1225
DTC Confirmation Procedure ..............................1226
Wiring Diagram ....................................................1227
Diagnostic Procedure ..........................................1228
Component Inspection .........................................1230
Removal and Installation .....................................1231
DTC P2127, P2128 APP SENSOR ........................1232
Component Description .......................................1232
CONSULT-II Reference Value in Data Monitor Mode
1232
On Board Diagnosis Logic ...................................1232
DTC Confirmation Procedure ..............................1233
Wiring Diagram ....................................................1234
Diagnostic Procedure ..........................................1235
Component Inspection .........................................1238
Removal and Installation .....................................1238
DTC P2135 TP SENSOR .......................................1239
Component Description .......................................1239
CONSULT-II Reference Value in Data Monitor Mode
1239
On Board Diagnosis Logic ...................................1239
DTC Confirmation Procedure ..............................1240
Wiring Diagram ....................................................1241
Diagnostic Procedure ..........................................1242
Component Inspection .........................................1245
Removal and Installation .....................................1245
DTC P2138 APP SENSOR ....................................1246
Component Description .......................................1246
CONSULT-II Reference Value in Data Monitor Mode
1246
On Board Diagnosis Logic ...................................1246
DTC Confirmation Procedure ..............................1247
Wiring Diagram ....................................................1248
Diagnostic Procedure ..........................................1249
Component Inspection .........................................1253
Removal and Installation .....................................1253
VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS) .....................................................................1254
Description ...........................................................1254

EC-14Revision: 2004 November 2004 FX35/FX45CONSULT-II Reference Value in Data Monitor Mode
1255
Wiring Diagram ....................................................1256
Diagnostic Procedure ..........................................1257
Component Inspection .........................................1260
Removal and Installation .....................................1261
IGNITION SIGNAL .................................................1262
Component Description .......................................1262
Wiring Diagram ....................................................1263
Diagnostic Procedure ..........................................1268
Component Inspection .........................................1272
Removal and Installation .....................................1273
INJECTOR CIRCUIT ..............................................1274
Component Description .......................................1274
CONSULT-II Reference Value in Data Monitor Mode
1274
Wiring Diagram ....................................................1275
Diagnostic Procedure ..........................................1276
Component Inspection .........................................1279
Removal and Installation .....................................1279
FUEL PUMP CIRCUIT ...........................................1280
Description ...........................................................1280
CONSULT-II Reference Value in Data Monitor Mode
1280
Wiring Diagram ....................................................1281
Diagnostic Procedure ..........................................1282
Component Inspection .........................................1285
Removal and Installation .....................................1286
REFRIGERANT PRESSURE SENSOR .................1287
Component Description .......................................1287
Wiring Diagram ....................................................1288
Diagnostic Procedure ..........................................1289
Removal and Installation .....................................1291
ELECTRICAL LOAD SIGNAL ...............................1292
Description ...........................................................1292
CONSULT-II Reference Value in Data Monitor Mode
1292
Diagnostic Procedure ..........................................1292
ICC BRAKE SWITCH .............................................1293
Component Description .......................................1293
CONSULT-II Reference Value in Data Monitor Mode
1293
Wiring Diagram ....................................................1294
Diagnostic Procedure ..........................................1295
Component Inspection .........................................1301
ASCD BRAKE SWITCH .........................................1302
Component Description .......................................1302
CONSULT-II Reference Value in Data Monitor Mode
1302Wiring Diagram ....................................................1303
Diagnostic Procedure ...........................................1304
Component Inspection .........................................1308
ASCD INDICATOR .................................................1309
Component Description .......................................1309
CONSULT-II Reference Value in Data Monitor Mode
1309
Wiring Diagram ....................................................1310
Diagnostic Procedure ...........................................1311
SNOW MODE SWITCH ..........................................1312
Description ...........................................................1312
CONSULT-II Reference Value in the Data Monitor
Mode ....................................................................1312
Wiring Diagram ....................................................1313
Diagnostic Procedure ...........................................1314
Component Inspection .........................................1317
MIL AND DATA LINK CONNECTOR .....................1318
Wiring Diagram ....................................................1318
EVAPORATIVE EMISSION SYSTEM ....................1320
Description ...........................................................1320
Component Inspection .........................................1323
Removal and Installation ......................................1324
How to Detect Fuel Vapor Leakage .....................1324
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ...................................................................1327
System Description ..............................................1327
Diagnostic Procedure ...........................................1328
Component Inspection .........................................1330
POSITIVE CRANKCASE VENTILATION ...............1332
Description ...........................................................1332
Component Inspection .........................................1332
AUTOMATIC SPEED CONTROL DEVICE (ASCD) 1334
System Description ..............................................1334
Component Description .......................................1335
SERVICE DATA AND SPECIFICATIONS (SDS) ...1336
Fuel Pressure .......................................................1336
Idle Speed and Ignition Timing .............................1336
Calculated Load Value .........................................1336
Mass Air Flow Sensor ..........................................1336
Intake Air Temperature Sensor ............................1336
Engine Coolant Temperature Sensor ...................1336
Heated Oxygen Sensor 1 Heater .........................1336
Heated Oxygen Sensor 2 Heater .........................1336
Crankshaft Position Sensor (POS) ......................1336
Camshaft Position Sensor (PHASE) ....................1336
Throttle Control Motor ..........................................1336
Injector .................................................................1337
Fuel Pump ............................................................1337