wiring INFINITI FX35 2007 User Guide

ACS-26
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WIRING DIAGRAM
Revision: 2006 July 2007 FX35/FX45
TKWM4447E

WIRING DIAGRAM ACS-27
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Revision: 2006 July 2007 FX35/FX45
TKWM4448E

AT-1
AUTOMATIC TRANSMISSION
C TRANSMISSION/TRANSAXLE
CONTENTS
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Revision: 2006 July 2007 FX35/FX45
AUTOMATIC TRANSMISSION
INDEX FOR DTC ........................................................ 5
Alphabetical Index ............................................... ..... 5
DTC No. Index .................................................... ..... 6
PRECAUTIONS ..................................................... ..... 7
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 7
Precautions for On Board Diagnostic (OBD) System
of A/T and Engine ............................................... ..... 7
Precautions ......................................................... ..... 8
Service Notice or Precautions ............................. ..... 9
PREPARATION ...................................................... ... 10
Special Service Tools .......................................... ... 10
Commercial Service Tools ................................... .... 11
A/T FLUID .............................................................. ... 12
Changing A/T Fluid ............................................. ... 12
Checking A/T Fluid .............................................. ... 13
A/T Fluid Cooler Cleaning ................................... ... 15
A/T CONTROL SYSTEM ....................................... ... 18
Cross-sectional View (2WD Models) ................... ... 18
Cross-sectional View (VQ35DE Models for AWD) ... 19
Cross-sectional View (VK45DE Models for AWD) ... 20
Shift Mechanism .................................................. ... 21
TCM Function ...................................................... ... 32
CAN Communication ........................................... ... 33
Input/Output Signal of TCM ................................. ... 33
Line Pressure Control ......................................... ... 34
Shift Control ........................................................ ... 35
Lock-up Control ................................................... ... 37
Engine Brake Control .......................................... ... 38
Control Valve ....................................................... ... 38
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......... ... 40
Introduction ......................................................... ... 40
OBD-II Function for A/T System .......................... ... 40
One or Two Trip Detection Logic of OBD-II ......... ... 40
OBD-II Diagnostic Trouble Code (DTC) .............. ... 40
Malfunction Indicator Lamp (MIL) ........................ ... 43
TROUBLE DIAGNOSIS ......................................... ... 44
DTC Inspection Priority Chart ............................. ... 44
Fail-safe .............................................................. ... 44 How to Perform Trouble Diagnosis for Quick and
Accurate Repair ................................................... ... 46
A/T Electrical Parts Location ............................... ... 51
Circuit Diagram .................................................... ... 52
Inspections Before Trouble Diagnosis ................. ... 53
Check Before Engine Is Started .......................... ... 57
Check at Idle ........................................................ ... 57
Cruise Test - Part 1 .............................................. ... 58
Cruise Test - Part 2 .............................................. ... 60
Cruise Test - Part 3 .............................................. ... 61
Vehicle Speed at Which Gear Shifting Occurs .... ... 62
Vehicle Speed at Which Lock-up Occurs/Releases ... 63
Symptom Chart .................................................... ... 64
TCM Input/Output Signal Reference Values ........ ... 89
CONSULT-II Function (A/T) ................................. ... 90
Diagnostic Procedure without CONSULT-II ......... .102
DTC U1000 CAN COMMUNICATION LINE ........... .104
Description ........................................................... .104
On Board Diagnosis Logic ................................... .104
Possible Cause .................................................... .104
DTC Confirmation Procedure .............................. .104
Wiring Diagram — AT — CAN ............................. .105
Diagnostic Procedure .......................................... .106
DTC P0615 START SIGNAL CIRCUIT .................. .107
Description ........................................................... .107
CONSULT-II Reference Value ............................. .107
On Board Diagnosis Logic ................................... .107
Possible Cause .................................................... .107
DTC Confirmation Procedure .............................. .107
Wiring Diagram — AT — STSIG ......................... .108
Diagnostic Procedure .......................................... .109
DTC P0700 TCM .................................................... .. 111
Description ........................................................... ..111
On Board Diagnosis Logic ................................... ..111
Possible Cause .................................................... ..111
DTC Confirmation Procedure .............................. ..111
Diagnostic Procedure .......................................... ..111
DTC P0705 PARK/NEUTRAL POSITION SWITCH .112
Description ........................................................... .112
CONSULT-II Reference Value ............................. .112

AT-2Revision: 2006 July 2007 FX35/FX45
On Board Diagnosis Logic ...................................
.112
Possible Cause .................................................... .112
DTC Confirmation Procedure .............................. .112
Wiring Diagram — AT — PNP/SW ...................... .113
Diagnostic Procedure .......................................... .114
DTC P0717 TURBINE REVOLUTION SENSOR ... .116
Description ........................................................... .116
CONSULT-II Reference Value ............................. .116
On Board Diagnosis Logic ................................... .116
Possible Cause .................................................... .116
DTC Confirmation Procedure .............................. .116
Diagnostic Procedure .......................................... .117
DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR) .............................................. .118
Description ........................................................... .118
CONSULT-II Reference Value ............................. .118
On Board Diagnosis Logic ................................... .118
Possible Cause .................................................... .118
DTC Confirmation Procedure .............................. .118
Wiring Diagram — AT — VSSA/T ........................ .120
Diagnostic Procedure .......................................... .121
DTC P0725 ENGINE SPEED SIGNAL .................. .123
Description ........................................................... .123
CONSULT-II Reference Value ............................. .123
On Board Diagnosis Logic ................................... .123
Possible Cause .................................................... .123
DTC Confirmation Procedure .............................. .123
Diagnostic Procedure .......................................... .124
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE ................................................ .125
Description ........................................................... .125
CONSULT-II Reference Value ............................. .125
On Board Diagnosis Logic ................................... .125
Possible Cause .................................................... .125
DTC Confirmation Procedure .............................. .125
Diagnostic Procedure .......................................... .126
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) .127
Description ........................................................... .127
CONSULT-II Reference Value ............................. .127
On Board Diagnosis Logic ................................... .127
Possible Cause .................................................... .127
DTC Confirmation Procedure .............................. .127
Diagnostic Procedure .......................................... .128
DTC P0745 LINE PRESSURE SOLENOID VALVE .129
Description ........................................................... .129
CONSULT-II Reference Value ............................. .129
On Board Diagnosis Logic ................................... .129
Possible Cause .................................................... .129
DTC Confirmation Procedure .............................. .129
Diagnostic Procedure .......................................... .130
DTC P1705 THROTTLE POSITION SENSOR ...... .131
Description ........................................................... .131
CONSULT-II Reference Value ............................. .131
On Board Diagnosis Logic ................................... .131
Possible Cause .................................................... .131
DTC Confirmation Procedure .............................. .131
Diagnostic Procedure .......................................... .132
DTC P1710 A/T FLUID TEMPERATURE SENSOR
CIRCUIT ................................................................. .134 Description ...........................................................
.134
CONSULT-II Reference Value .............................. .134
On Board Diagnosis Logic ................................... .134
Possible Cause .................................................... .134
DTC Confirmation Procedure ............................... .134
Wiring Diagram — AT — FTS .............................. .135
Diagnostic Procedure ........................................... .136
Component Inspection ......................................... .138
DTC P1721 VEHICLE SPEED SENSOR MTR ...... .139
Description ........................................................... .139
CONSULT-II Reference Value .............................. .139
On Board Diagnosis Logic ................................... .139
Possible Cause .................................................... .139
DTC Confirmation Procedure ............................... .139
Diagnostic Procedure ........................................... .140
DTC P1730 A/T INTERLOCK ................................ .141
Description ........................................................... .141
On Board Diagnosis Logic ................................... .141
Possible Cause .................................................... .141
DTC Confirmation Procedure ............................... .141
Judgement of A/T Interlock .................................. .141
Diagnostic Procedure ........................................... .142
DTC P1731 A/T 1ST ENGINE BRAKING .............. .144
Description ........................................................... .144
CONSULT-II Reference Value .............................. .144
On Board Diagnosis Logic ................................... .144
Possible Cause .................................................... .144
DTC Confirmation Procedure ............................... .144
Diagnostic Procedure ........................................... .145
DTC P1752 INPUT CLUTCH SOLENOID VALVE . .146
Description ........................................................... .146
CONSULT-II Reference Value .............................. .146
On Board Diagnosis Logic ................................... .146
Possible Cause .................................................... .146
DTC Confirmation Procedure ............................... .146
Diagnostic Procedure ........................................... .147
DTC P1754 INPUT CLUTCH SOLENOID VALVE
FUNCTION ............................................................. .148
Description ........................................................... .148
CONSULT-II Reference Value .............................. .148
On Board Diagnosis Logic ................................... .148
Possible Cause .................................................... .148
DTC Confirmation Procedure ............................... .148
Diagnostic Procedure ........................................... .149
DTC P1757 FRONT BRAKE SOLENOID VALVE .. .150
Description ........................................................... .150
CONSULT-II Reference Value .............................. .150
On Board Diagnosis Logic ................................... .150
Possible Cause .................................................... .150
DTC Confirmation Procedure ............................... .150
Diagnostic Procedure ........................................... .151
DTC P1759 FRONT BRAKE SOLENOID VALVE
FUNCTION ............................................................. .152
Description ........................................................... .152
CONSULT-II Reference Value .............................. .152
On Board Diagnosis Logic ................................... .152
Possible Cause .................................................... .152
DTC Confirmation Procedure ............................... .152
Diagnostic Procedure ........................................... .153

AT-3
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DTC P1762 DIRECT CLUTCH SOLENOID VALVE
. 154
Description .......................................................... . 154
CONSULT-II Reference Value ............................. . 154
On Board Diagnosis Logic .................................. . 154
Possible Cause ................................................... . 154
DTC Confirmation Procedure .............................. . 154
Diagnostic Procedure .......................................... . 155
DTC P1764 DIRECT CLUTCH SOLENOID VALVE
FUNCTION ............................................................. . 156
Description .......................................................... . 156
CONSULT-II Reference Value ............................. . 156
On Board Diagnosis Logic .................................. . 156
Possible Cause ................................................... . 156
DTC Confirmation Procedure .............................. . 156
Diagnostic Procedure .......................................... . 157
DTC P1767 HIGH AND LOW REVERSE CLUTCH
SOLENOID VALVE ................................................ . 158
Description .......................................................... . 158
CONSULT-II Reference Value ............................. . 158
On Board Diagnosis Logic .................................. . 158
Possible Cause ................................................... . 158
DTC Confirmation Procedure .............................. . 158
Diagnostic Procedure .......................................... . 159
DTC P1769 HIGH AND LOW REVERSE CLUTCH
SOLENOID VALVE FUNCTION ............................ . 160
Description .......................................................... . 160
CONSULT-II Reference Value ............................. . 160
On Board Diagnosis Logic .................................. . 160
Possible Cause ................................................... . 160
DTC Confirmation Procedure .............................. . 160
Diagnostic Procedure .......................................... . 161
DTC P1772 LOW COAST BRAKE SOLENOID
VALVE .................................................................... . 162
Description .......................................................... . 162
CONSULT-II Reference Value ............................. . 162
On Board Diagnosis Logic .................................. . 162
Possible Cause ................................................... . 162
DTC Confirmation Procedure .............................. . 162
Diagnostic Procedure .......................................... . 163
DTC P1774 LOW COAST BRAKE SOLENOID
VALVE FUNCTION ................................................ . 164
Description .......................................................... . 164
CONSULT-II Reference Value ............................. . 164
On Board Diagnosis Logic .................................. . 164
Possible Cause ................................................... . 164
DTC Confirmation Procedure .............................. . 164
Diagnostic Procedure .......................................... . 165
DTC P1815 MANUAL MODE SWITCH ................. . 166
Description .......................................................... . 166
CONSULT-II Reference Value in Data Monitor Mode . 166
On Board Diagnosis Logic .................................. . 166
Possible Cause ................................................... . 166
DTC Confirmation Procedure .............................. . 166
Wiring Diagram — AT — MMSW ........................ . 167
Diagnostic Procedure .......................................... . 169
Component Inspection ........................................ . 170
DTC P1841 ATF PRESSURE SWITCH 1 .............. . 171
Description .......................................................... . 171 CONSULT-II Reference Value .............................
.171
On Board Diagnosis Logic ................................... .171
Possible Cause .................................................... .171
DTC Confirmation Procedure .............................. .171
Diagnostic Procedure .......................................... .172
DTC P1843 ATF PRESSURE SWITCH 3 .............. .173
Description ........................................................... .173
CONSULT-II Reference Value ............................. .173
On Board Diagnosis Logic ................................... .173
Possible Cause .................................................... .173
DTC Confirmation Procedure .............................. .173
Diagnostic Procedure .......................................... .174
DTC P1845 ATF PRESSURE SWITCH 5 .............. .175
Description ........................................................... .175
CONSULT-II Reference Value ............................. .175
On Board Diagnosis Logic ................................... .175
Possible Cause .................................................... .175
DTC Confirmation Procedure .............................. .175
Diagnostic Procedure .......................................... .176
DTC P1846 ATF PRESSURE SWITCH 6 .............. .177
Description ........................................................... .177
CONSULT-II Reference Value ............................. .177
On Board Diagnosis Logic ................................... .177
Possible Cause .................................................... .177
DTC Confirmation Procedure .............................. .177
Diagnostic Procedure .......................................... .178
MAIN POWER SUPPLY AND GROUND CIRCUIT .179
Wiring Diagram — AT — MAIN ........................... .179
Diagnostic Procedure .......................................... .180
CLOSED THROTTLE POSITION AND WIDE OPEN
THROTTLE POSITION CIRCUIT ........................... .183
CONSULT-II Reference Value ............................. .183
Diagnostic Procedure .......................................... .183
BRAKE SIGNAL CIRCUIT ..................................... .184
CONSULT-II Reference Value ............................. .184
Diagnostic Procedure .......................................... .184
A/T INDICATOR CIRCUIT ...................................... .185
Description ........................................................... .185
CONSULT-II Reference Value ............................. .185
Diagnostic Procedure .......................................... .185
TROUBLE DIAGNOSIS FOR SYMPTOMS ........... .186
Wiring Diagram — AT — NONDTC ..................... .186
A/T CHECK Indicator Lamp Does Not Come On . 189
Engine Cannot Be Started in “P” or “N” Position . .190
In “P” Position, Vehicle Moves When Pushed ..... .191
In “N” Position, Vehicle Moves ............................. .192
Large Shock (“N” to “D” Position) ........................ .193
Vehicle Does Not Creep Backward in “R” Position .196
Vehicle Does Not Creep Forward in “D” Position . 199
Vehicle Cannot Be Started From D
1 .................... .201
A/T Does Not Shift: D
1 → D2 ............................... .204
A/T Does Not Shift: D
2 → D3 ............................... .206
A/T Does Not Shift: D
3 → D4 ............................... .208
A/T Does Not Shift: D
4 → D5 ............................... .211
A/T Does Not Lock-up ......................................... .213
A/T Does Not Hold Lock-up Condition ................. .215
Lock-up Is Not Released ..................................... .217
Engine Speed Does Not Return to Idle ............... .217
Cannot Be Changed to Manual Mode ................. .219

AT-4Revision: 2006 July 2007 FX35/FX45
A/T Does Not Shift: 5th Gear
→ 4th Gear ........... .219
A/T Does Not Shift: 4th Gear → 3rd Gear ........... .221
A/T Does Not Shift: 3rd Gear → 2nd Gear .......... .223
A/T Does Not Shift: 2nd Gear → 1st Gear ........... .225
Vehicle Does Not Decelerate by Engine Brake ... .227
SHIFT CONTROL SYSTEM ................................... .229
Control Device Removal and Installation ............. .229
Control Rod Removal and Installation ................. .230
Adjustment of A/T Position .................................. .231
Checking of A/T Position ..................................... .231
A/T SHIFT LOCK SYSTEM .................................... .232
Description ........................................................... .232
Shift Lock System Electrical Parts Location ........ .232
Wiring Diagram — AT — SHIFT .......................... .233
Diagnostic Procedure .......................................... .234
KEY INTERLOCK CABLE ..................................... .236
Components ........................................................ .236
Removal and Installation ..................................... .237
ON-VEHICLE SERVICE ......................................... .239
Control Valve with TCM and A/T Fluid Temperature
Sensor 2 .............................................................. .239
Parking Components (2WD Models Only) ........... .250
Rear Oil Seal ....................................................... .258
Revolution Sensor Components (2WD Models
Only) .................................................................... .259
AIR BREATHER HOSE .......................................... .264
Removal and Installation ..................................... .264
TRANSMISSION ASSEMBLY ............................... .266
Removal and Installation (2WD Models) ............. .266
Removal and Installation (AWD Models) ............. .269 OVERHAUL ............................................................
.274
Components ......................................................... .274
Oil Channel .......................................................... .288
Locations of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings ......................... .291
DISASSEMBLY ...................................................... .294
Disassembly ......................................................... .294
REPAIR FOR COMPONENT PARTS ..................... .312
Oil Pump .............................................................. .312
Front Sun Gear, 3rd One-way Clutch ................... .315
Front Carrier, Input Clutch, Rear Internal Gear .... .317
Mid Sun Gear, Rear Sun Gear, High and Low
Reverse Clutch Hub ............................................. .323
High and Low Reverse Clutch ............................. .329
Direct Clutch ........................................................ .332
ASSEMBLY ............................................................ .335
Assembly (1) ........................................................ .335
Adjustment ........................................................... .349
Assembly (2) ........................................................ .352
SERVICE DATA AND SPECIFICATIONS (SDS) ... .359
General Specifications ......................................... .359
Vehicle Speed at Which Gear Shifting Occurs ..... .359
Vehicle Speed at Which Lock-up Occurs/Releases .360
Stall Speed ........................................................... .360
Line Pressure ....................................................... .360
A/T Fluid Temperature Sensor ............................. .360
Turbine Revolution Sensor ................................... .361
Vehicle Speed Sensor A/T (Revolution Sensor) .. .361
Reverse Brake ..................................................... .361
Total End Play ...................................................... .361

PRECAUTIONS AT-7
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Revision: 2006 July 2007 FX35/FX45
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NCS001AN
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for On Board Diagnostic (OBD) System of A/T and EngineNCS001AO
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:

Be sure to turn the ignition switch OFF and disconnect the battery cable from the negative termi-
nal before any repair or inspection work. The open/short circuit of related switches, sensors, sole-
noid valves, etc. Will cause the MIL to light up.

Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)

Be sure to route and secure the harnesses properly after work. Interference of the harness with a
bracket, etc. May cause the MIL to light up due to a short circuit.

Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to a malfunction of the EVAP system or fuel injection system,
etc.

Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.

A/T CONTROL SYSTEM AT-33
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Revision: 2006 July 2007 FX35/FX45
CAN CommunicationNCS001B0
SYSTEM DESCRIPTION
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. For details, refer to LAN-49,
"CAN System Specification Chart" .
Input/Output Signal of TCMNCS001B1
*1: Spare for vehicle speed sensor·A/T (revolution sensor)
*2: Spare for accelerator pedal position signal
*3: If these input and output signals are different, the TCM triggers the fail-safe function.
*4: Used as a condition for starting self-diagnostics; if self-diagnostics are not started, it is judged that there is some kin d of error.
*5: Input by CAN communications
*6: Output by CAN communications Control item
Line
pressure control Vehicle
speed
control Shift
control Lock-up
control Engine
brake
control Fail-safe
function (*3) Self-diag-
nostics
function
Input Accelerator pedal position signal
(*5)XXXXXXX
Vehicle speed sensor A/T
(revolution sensor) XXXXXXX
Vehicle speed sensor MTR
(*1) (*5)X
Closed throttle position signal
(*5)X (*2) X X X X (*4)
Wide open throttle position signal
(*5)XX (*4)
Turbine revolution sensor 1 X X X X X
Turbine revolution sensor 2
(for 4th speed only) X XXXX
Engine speed signals
(*5)XXXXXXX
Stop lamp switch signal
(*5)XXX X (*4)
A/T fluid temperature sensors 1, 2XXXX XX
ASCD or
ICC Operation signal
(*5)XXX
Overdrive cancel
signal
(*5)X
Out-
put Direct clutch solenoid (ATF pres-
sure switch 5) XX XX
Input clutch solenoid (ATF pressure
switch 3) XX XX
High and low reverse clutch sole-
noid (ATF pressure switch 6) XX XX
Front brake solenoid (ATF pressure
switch 1) XX XX
Low coast brake solenoid (ATF
pressure switch 2) XX XXX
Line pressure solenoid XXXXXXX
TCC solenoid X X X
Self-diagnostics table
(*6)X
Sta rter rela y XX

AT-46
TROUBLE DIAGNOSIS
Revision: 2006 July 2007 FX35/FX45
How to Perform Trouble Diagnosis for Quick and Accurate RepairNCS001BE
INTRODUCTION
The TCM receives a signal from the vehicle speed sensor, accelerator pedal position sensor (throttle position
sensor) or PNP switch and provides shift control or lock-up control via A/T solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used with the OBD-related parts of the
A/T system for malfunction-diagnostic purposes. The TCM is capa-
ble of diagnosing malfunctioning parts while the ECM can store mal-
functions in its memory.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good oper-
ating condition and be free of valve seizure, solenoid valve malfunc-
tion, etc.
It is much more difficult to diagnose a error that occurs intermittently
rather than continuously. Most intermittent errors are caused by poor
electric connections or improper wiring. In this case, careful check-
ing of suspected circuits may help prevent the replacement of good
parts.
A visual check only may not find the cause of the errors. A road test
with CONSULT-II (or GST) or a circuit tester connected should be
performed. Follow the AT- 4 6 , "
WORK FLOW" .
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such errors, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A “DIAGNOSTIC WORKSHEET” as
shown on the example (Refer to AT- 4 8
) should be used.
Start your diagnosis by looking for “conventional” errors first. This will
help troubleshoot driveability errors on an electronically controlled
engine vehicle.
Also check related Service bulletins.
WORK FLOW
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malfunction. It is important to fully understand the symp-
toms or conditions for a customer complaint.
Make good use of the two sheets provided, “Information From Customer” (Refer to AT- 4 7
) and “DIAGNOSTIC
WORKSHEET” (Refer to AT- 4 8
), to perform the best troubleshooting possible.
SAT631IB
SAT632I
SEF234G

AT-104
DTC U1000 CAN COMMUNICATION LINE
Revision: 2006 July 2007 FX35/FX45
DTC U1000 CAN COMMUNICATION LINEPFP:23710
DescriptionNCS001BT
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 malfunction detection ability.
Many electronic 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 con-
nected 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.
On Board Diagnosis LogicNCS001BU

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “U1000 CAN COMM CIRCUIT” with CONSULT-II or 17th judgement flicker with-
out CONSULT-II is detected when TCM cannot communicate to other control units.
Possible CauseNCS001BV
Harness or connectors
(CAN communication line is open or shorted.)
DTC Confirmation ProcedureNCS001BW
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine and wait for at least 6 seconds.
4. If DTC is detected, go to AT- 1 0 6 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
BCIA0031E