ecm INFINITI M35 2007 Factory Workshop Manual

TROUBLE DIAGNOSIS
ATC-97
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Revision: 2007 April2007 M35/M45
8. CHECK CAN COMMUNICATION
Check CAN communication. Refer to EC-161, "
DTC U1000, U1001 CAN COMMUNICATION LINE"
(VQ35DE) or EC-865, "DTC U1000, U1001 CAN COMMUNICATION LINE" (VK45DE).

ECM – IPDM E/R

ECM – Unified meter and A/C amp.
OK or NG
OK >> Replace ECM.
NG >> Repair or replace malfunctioning part(s).
COMPONENT INSPECTION
Refrigerant Pressure Sensor
The refrigerant pressure sensor is attached to the liquid tank.
Make sure that the A/C refrigerant pressure and the sensor output
voltage are within the specified range as shown in the A/C operating
condition figure. Refer to EC-704, "
REFRIGERANT PRESSURE
SENSOR" (VQ35DE) or EC-1424, "REFRIGERANT PRESSURE
SENSOR" (VK45DE).
RJIA4080E
RJIA2954E

BLOWER UNIT
ATC-129
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Revision: 2007 April2007 M35/M45
BLOWER UNITPFP:27200
Removal and InstallationNJS000IA
REMOVAL
1. Remove instrument passenger lower cover and glove box cover. Refer to IP-10, "INSTRUMENT PANEL
ASSEMBLY" .
2. Remove BCM. Refer to BCS-15, "
Removal and Installation of BCM" .
3. Remove mounting nuts, and then remove ECM with bracket
attached.
4. Disconnect intake door motor connector and blower fan motor
connector.
5. Remove mounting bolt and screw from blower unit.
CAUTION:
Move blower unit rightward, and remove locating pin (1
part) and joint. Then remove blower unit downward.
6. Remove blower unit.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:
Make sure locating pin (1 part) and joint are securely inserted.
R J I A 4 111 E
RJIA4112E

ATC-132
INTAKE DOOR MOTOR
Revision: 2007 April2007 M35/M45
INTAKE DOOR MOTORPFP:27730
Removal and InstallationNJS000HD
REMOVAL
1. Remove ECM with bracket attached. Refer to ATC-129, "BLOWER UNIT" .
2. Remove mounting screws, and then remove intake door motor
from blower unit.
3. Disconnect intake door motor connector.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA4115E

AV-8
[WITHOUT MOBILE ENTERTAINMENT SYSTEM]
SYSTEM DESCRIPTION
Revision: 2007 April2007 M35/M45
SYSTEM DESCRIPTIONPFP:00000
System FunctionsNKS00489
Here is an example of functions. For details, refer to the owner's manual or navigation system owner's manual.
AUDIO
Speed Sensitive Volume (for BASE System)

Volume level of this system gone up and down automatically in proportion to the vehicle speed. And the
control level can be selected by the customer.

The audio unit inputs the vehicle signal that is sent from unified meter and A/C amp via CAN communica-
tion through AV (NAVI) control unit.
Precision Phased Audio (for BASE System)

It plays back the sound using the woofer (ultra-low bass and clear midrange sound) and reproduces the
sound with presence.

When the conventional BASS/TREBLE adjustment is a maximum, the sounds might be unclear because
the volume of midrange sound also rises together with the bass and treble. The precision phased audio
can emphasize ultra-low bass and ultra-high treble without changing the midrange sound by digital pro-
cessing using DSP.
NOTE:
When the radio is played, the noise may increase more than the presence due to the characteristics of
broadcasting waves. Therefore, the amplification rate while playing the radio is controlled lower than the
rate while playing CD.
AudioPilot® (for BOSE System)
AudioPilot® is the sound improving system that picks up any noises and the sound of music coming into the
vehicle by a microphone under the steering, and that the BOSE amp revises the frequency feature of music at
real time in response to the frequency feature of the noise while driving and listening to music.

If low frequency area noise from vehicle is loud, it adjusts low frequency element of music to be bigger
than vehicle noise.

If high frequency area noise from vehicle is loud, it adjusts all frequency element of music to be bigger
than vehicle noise.
Centerpoint® (for BOSE Surround 5.1ch System)
CD and 2.0ch DVD stereo sound played at audio unit and DVD player are subjected to signal processing in
BOSE amp. It can play the surround sound with presence.
VEHICLE INFORMATION SYSTEM

The status of audio, climate control system, fuel consumption, and navigation system (if equipped) are
displayed.

AV (NAVI) control unit receives the data signal from ECM, unified meter and A/C amp and low tire pres-
sure warning control unit via CAN communication. It calculates the values of fuel economy, tire pressure,
and trip computer from the received information and displays them.
NAVIGATION SYSTEM
Location Detection Principle
The navigation system periodically calculates the vehicle's current
position according to the following three signals:

Travel distance of the vehicle as determined by the vehicle
speed sensor

Turning angle of the vehicle as determined by the gyroscope
(angular velocity sensor)

Direction of vehicle travel as determined by the GPS antenna
(GPS information)
The current position of the vehicle is then identified by comparing the
calculated vehicle position with map data read from the map DVD-
ROM, which is stored in the DVD-ROM drive (map-matching), and
SKIB1058E

DIAGNOSIS SYSTEM
AV-97
[WITHOUT MOBILE ENTERTAINMENT SYSTEM]
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AV
Revision: 2007 April2007 M35/M45
VEHICLE CAN DIAGNOSIS

CAN communication status and error counter is displayed.

Error counter displays 0 if any malfunction is not detected in the
past. If the malfunction is detected, it displays 40. When turning
the ignition switch ON, if it is normal, it displays 39. The lower
limit of the counter is 1.

If it is reset, the error counter is deleted.
NOTE:
“???” indicates “UNKWN”.
AV COMM DIAGNOSIS

Displays the communication condition between AV (NAVI) con-
trol unit (master unit) and each unit and between audio unit
(sub-master unit) and each unit.

Error counter displays 0 if any malfunction is not detected in the
past. If the malfunction is detected, it displays 40. When turning
the ignition switch ON, if it is normal, it displays 39. The lower
limit of the counter is 1.

If it is reset, the error counter is deleted.
ITM: AV (NAVI) control unit
NOTE:
“???” indicates “UNKWN”.Items Display (Current)Error counter
(Past)
Tx (HVAC) OK /??? 0 - 40
Rx (ECM) OK /??? 0 - 40
Rx (Cluster) OK /??? 0 - 40
Rx (BCM) OK /??? 0 - 40
Rx (HVAC) OK /??? 0 - 40
Rx (USM) OK /??? 0 - 40
Rx (TPMS) OK /??? 0 - 40
SKIB3666E
ItemsStatus
(Current)Counter
(Past)
C Tx (ITM-PrimarySW) OK /??? 0 - 40
C Rx (PrimarySW-ITM) OK /??? 0 - 40
C Rx (STRG SW-ITM) OK /??? 0 - 40
C Rx (RrSeatSW-ITM) OK /??? 0 - 40
C Rx (Audio-ITM) OK /??? 0 - 40
C Rx (Amp-ITM) OK /??? 0 - 40
C Rx (RearCamera-ITM) OK /??? 0 - 40
C Rx (DVD-ITM) OK /??? 0 - 40
C Rx (Amp-Audio) OK /??? 0 - 40
C Rx (DVD-Audio) OK /??? 0 - 40SKIB3667E

AV-142
[WITH MOBILE ENTERTAINMENT SYSTEM]
SYSTEM DESCRIPTION
Revision: 2007 April2007 M35/M45
SYSTEM DESCRIPTIONPFP:00000
System FunctionsNKS004AB
Here is an example of functions. For details, refer to the owner's manual or navigation system owner's manual.
AUDIO
AudioPilot
® (for BOSE System)
AudioPilot® is the sound improving system that picks up any noises and the sound of music coming into the
vehicle by a microphone under the steering, and that the BOSE amp revises the frequency feature of music at
real time in response to the frequency feature of the noise while driving and listening to music.

If low frequency area noise from vehicle is loud, it adjusts low frequency element of music to be bigger
than vehicle noise.

If high frequency area noise from vehicle is loud, it adjusts all frequency element of music to be bigger
than vehicle noise.
Centerpoint® (for BOSE Surround 5.1ch System)
CD and 2.0ch DVD stereo sound played at audio unit and DVD player are subjected to signal processing in
BOSE amp. It can play the surround sound with presence.
VEHICLE INFORMATION SYSTEM

The status of audio, climate control system, fuel consumption, and navigation system (if equipped) are
displayed.

AV (NAVI) control unit receives the data signal from ECM, unified meter and A/C amp and low tire pres-
sure warning control unit via CAN communication. It calculates the values of fuel economy, tire pressure,
and trip computer from the received information and displays them.
NAVIGATION SYSTEM
Location Detection Principle
The navigation system periodically calculates the vehicle's current
position according to the following three signals:

Travel distance of the vehicle as determined by the vehicle
speed sensor

Turning angle of the vehicle as determined by the gyroscope
(angular velocity sensor)

Direction of vehicle travel as determined by the GPS antenna
(GPS information)
The current position of the vehicle is then identified by comparing the
calculated vehicle position with map data read from the map DVD-
ROM, which is stored in the DVD-ROM drive (map-matching), and
indicated on the screen as a vehicle mark. More accurate data is judged and used by comparing vehicle posi-
tion detection results found by the GPS with the result by map-matching.
The current vehicle position will be calculated by detecting the dis-
tance the vehicle moved from the previous calculation point and its
direction.

Travel distance
Travel distance calculations are based on the vehicle speed
sensor input signal. Therefore, the calculation may become
incorrect as the tires wear down. To prevent this, an automatic
distance correction function has been adopted.

Travel direction
Change in the travel direction of the vehicle is calculated by a
gyroscope (angular velocity sensor) and a GPS antenna (GPS
information). They have both advantages and disadvantages.
SKIB1058E
SEL684V

DIAGNOSIS SYSTEM
AV-237
[WITH MOBILE ENTERTAINMENT SYSTEM]
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AV
Revision: 2007 April2007 M35/M45
VEHICLE CAN DIAGNOSIS

CAN communication status and error counter is displayed.

Error counter displays 0 if any malfunction is not detected in the
past. If the malfunction is detected, it displays 40. When turning
the ignition switch ON, if it is normal, it displays 39. The lower
limit of the counter is 1.

If it is reset, the error counter is deleted.
NOTE:
??? indicates “UNKWN”.
AV COMM DIAGNOSIS

Displays the communication condition between AV (NAVI) con-
trol unit (master unit) and each unit and between audio unit
(sub-master unit) and each unit.

Error counter displays 0 if any malfunction is not detected in the
past. If the malfunction is detected, it displays 40. When turning
the ignition switch ON, if it is normal, it displays 39. The lower
limit of the counter is 1.

If it is reset, the error counter is deleted.
DVD-ROM Communication Error

Malfunction is detected on DVD-
ROM drive pickup lens in NAVI con-
trol unit

There is dirt and damage on the map
disc

Map disc

NAVI control unit
Refer to AV-282, "
AV ( N AV I ) C o n t r o l
Unit"
DVD-ROM Read Error
DVD-ROM Disc Error
DVD-ROM Mechanism not Detected
DVD-ROM Mechanism Error
DVD-ROM Focus Error
DVD-ROM TOC Error
DVD-ROM Seek Error
DVD-ROM Error Correction Error
DVD-ROM Data Transfer Error
DVD-ROM Data Error
DVD-ROM Time-out
DVD-ROM Loading / Eject Error
CAN Controller Memory Error
AV (NAVI) control unit malfunction is
detectedReplace AV (NAVI) control unit
Refer to AV-282, "
AV (NAVI) Control Unit"Bluetooth Module Connection ErrorError item Description Possible cause/Action to take
Items Display (Current)Error counter
(Past)
Tx (HVAC) OK /??? 0 - 40
Rx (ECM) OK /??? 0 - 40
Rx (Cluster) OK /??? 0 - 40
Rx (BCM) OK /??? 0 - 40
Rx (HVAC) OK /??? 0 - 40
Rx (USM) OK /??? 0 - 40
Rx (TPMS) OK /??? 0 - 40
SKIB3666E
ItemsStatus
(Current)Counter
(Past)
C Tx (ITM-PrimarySW) OK /??? 0 - 40
C Rx (PrimarySW-ITM) OK /??? 0 - 40
C Rx (STRG SW-ITM) OK /??? 0 - 40SKIB3667E

BCM (BODY CONTROL MODULE)
BCS-3
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BCS
Revision: 2007 April2007 M35/M45
BCM (BODY CONTROL MODULE)PFP:284B2
System DescriptionNKS003XH
BCM (Body Control Module) controls the operation of various electrical units installed on the vehicle.
BCM FUNCTION
BCM has combination switch reading function for reading the operation of combination switches (light, wiper,
washer, turn signal) in addition to a function for controlling the operation of various electrical components. Also
it has an interface function allowing it to receive signals from the combination meter, and send signals to ECM
using CAN communication.
COMBINATION SWITCH READING FUNCTION
Description

BCM reads combination switch (lighting switch, wiper switch) status, and controls various electrical com-
ponent according to the result.

BCM reads information of a maximum of 20 switches by combining five output terminals (OUTPUT 1-5)
and five input terminals (INPUT 1-5).
Operation Description

BCM activates transistors of output terminals (OUTPUT 1-5) periodically, and allows current to flow in
turn.

If any (1 or more) switches are turned ON, circuit of output terminals (OUTPUT 1-5) and input terminals
(INPUT 1-5) becomes active.

At this time, transistors of output terminals (OUTPUT 1-5) are activated to allow current to flow. When volt-
age of input terminals (INPUT 1-5) corresponding to that switch changes, interface in BCM detects volt-
age change, and BCM determines that switch is ON.
PKID0470E

BCM (BODY CONTROL MODULE)
BCS-13
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BCS
Revision: 2007 April2007 M35/M45
WORK SUPPORT
Operation Procedure
1. Touch “BCM” on “SELECT TEST ITEM” screen.
2. Touch “WORK SUPPORT” on “SELECT DIAG MODE” screen.
3. Touch “RESET SETTING VALUE” on “SELECT WORK ITEM” screen.
4. Touch “START”.
5. “RESET SETTING VALUE OK?” displayed, and touch “YES”.
6. The setting will be changed and “COMPLETED” will be displayed.
7. Touch “END”.
Display Item List
CAN DIAG SUPPORT MNTR
Refer to LAN-44, "CAN Diagnostic Support Monitor" .
CAN Communication Inspection Using CONSULT-II (Self-Diagnosis)NKS003XL
1. CHECK SELF-DIAGNOSTIC RESULT
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
1. Connect to CONSULT-II, and select “BCM” on “SELECT SYSTEM” screen.
2. Select “BCM” on “SELECT DIAG MODE” screen, and select “SELF-DIAG RESULTS”.
3. Check display content in self-diagnostic results.
Contents displayed
No malfunction>>INSPECTION END
Malfunction in CAN communication system>>After printing the monitor items, go to “CAN System”. Refer to
LAN-50, "
CAN System Specification Chart" .
Item Description
RESET SETTING VALUE Return a value set with WORK SUPPORT of each system to a default value in factory shipment.
CONSULT-II display code Diagnosis item
U1000TRANSMIT DIAG
ECM
METER / M&A
MULTI AV
IPDM E/R
I - KEY
TIRE-P

BL-4Revision: 2007 April2007 M35/M45 Terminals and Reference Value for BCM ..............211
CONSULT-II Function (BCM) ................................212
CONSULT-II START PROCEDURE ..................212
DATA MONITOR ................................................212
ACTIVE TEST ...................................................212
Trouble Diagnosis .................................................213
TRUNK DOSE NOT OPEN WITH TRUNK LID
OPENER SWITCH / WITH INTELLIGENT KEY .213
VEHICLE SECURITY (THEFT WARNING) SYSTEM .217
Component Parts and Harness Connector Location .217
System Description ...............................................219
DESCRIPTION ..................................................219
POWER SUPPLY AND GROUND CIRCUIT .....220
INITIAL CONDITION TO ACTIVATE THE SYS-
TEM ...................................................................220
VEHICLE SECURITY SYSTEM ALARM OPER-
ATION ................................................................221
VEHICLE SECURITY SYSTEM DEACTIVATION .221
PANIC ALARM OPERATION .............................221
CAN Communication System Description ............221
CAN Communication Unit .....................................221
Schematic .............................................................222
Wiring Diagram — VEHSEC — ............................223
Terminals and Reference Value of BCM ...............229
Terminals and Reference Value of IPDM E/R .......229
CONSULT-II Function (BCM) ................................230
BASIC OPERATION ..........................................230
CONSULT-II APPLICATION ITEM .....................230
Trouble Diagnosis Work Flow ...............................231
Preliminary Check ................................................231
Trouble Diagnosis Symptom Chart .......................233
Diagnostic Procedure 1 ........................................234
DOOR SWITCH CHECK ...................................234
HOOD SWITCH CHECK ...................................237
TRUNK ROOM LAMP SWITCH CHECK ..........239
Diagnostic Procedure 2 ........................................241
SECURITY INDICATOR LAMP CHECK ............241
Diagnostic Procedure 3 ........................................242
FRONT DOOR KEY CYLINDER SWITCH
CHECK ..............................................................242
Diagnostic Procedure 4 ........................................242
VEHICLE SECURITY HORN ALARM CHECK . 242
Diagnostic Procedure 5 ........................................243
VEHICLE SECURITY HEADLAMP ALARM
CHECK ..............................................................243
Diagnostic Procedure 6 ........................................243
DOOR LOCK AND UNLOCK SWITCH CHECK .243
Diagnostic Procedure 7 ........................................243
VEHCLE SECURITY HAZARD LAMP ALARM
CHECK ..............................................................243
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ......................................................................244
Component Parts and Harness Connector Location .244
System Description ...............................................246
DESCRIPTION ..................................................246
PRECAUTIONS FOR KEY REGISTRATION ....246
SECURITY INDICATOR ....................................246
Operation Description ...........................................247
SYSTEM DIAGRAM ..........................................247OPERATION WHEN INSERTING TO KEY SLOT .247
OPERATION WHEN INTELLIGENT KEY IS
CARRIED ...........................................................247
PUSH-BUTTON IGNITION SWITCH OPERA-
TION PROCEDURE ..........................................247
ECM Re-Communicating Function .......................248
Schematic .............................................................250
Wiring Diagram — NATS — ..................................252
Terminals and Reference Value for Intelligent Key
Unit ........................................................................260
Terminals and Reference Value for Steering Lock
Unit ........................................................................262
Terminals and Reference Value for BCM ..............263
Terminals and Reference Value for IPDM E/R ......263
Terminals and Reference Value for PDU ..............264
CONSULT-II ..........................................................265
CONSULT-II INSPECTION PROCEDURE ........265
CONSULT-II DIAGNOSTIC TEST MODE FUNC-
TION ..................................................................266
HOW TO READ SELF-DIAGNOSTIC RESULTS .267
“NATS V5.0” SELF-DIAGNOSTIC RESULTS
ITEM CHART .....................................................268
“NATS BCM OR S/ENT” SELF-DIAGNOSTIC
RESULTS ITEM CHART ....................................268
“NATS I-KEY” SELF-DIAGNOSTIC RESULTS
ITEM CHART .....................................................269
Work Flow .............................................................269
Trouble Diagnoses Flow Chart for IVIS (NATS) ....272
Symptom Chart for Security Indicator ...................274
CONDITIONS OF VEHICLE (OPERATING CON-
DITIONS) ...........................................................274
Check Security Indicator Harness .........................274
DTC P1612 CHAIN of ECM-IMMU .......................275
DTC P1611 ID DISCORD, IMM-ECM ...................277
Removal and Installation of Key Slot ....................277
REMOVAL ..........................................................277
INSTALLATION ..................................................277
INTEGRATED HOMELINK TRANSMITTER ...........278
Wiring Diagram —TRNSCV— ..............................278
Trouble Diagnoses ................................................279
DIAGNOSTIC PROCEDURE .............................279
BODY REPAIR ........................................................281
Body Exterior Paint Color ......................................281
Body Component Parts .........................................282
UNDERBODY COMPONENT PARTS ...............282
BODY COMPONENT PARTS ............................284
Corrosion Protection .............................................286
DESCRIPTION ..................................................286
UNDERCOATING ..............................................287
Body Sealing .........................................................288
DESCRIPTION ..................................................288
Body Construction .................................................291
BODY CONSTRUCTION ...................................291
Body Alignment .....................................................292
BODY CENTER MARKS ...................................292
PANEL PARTS MATCHING MARKS .................293
DESCRIPTION ..................................................294
ENGINE COMPARTMENT ................................295
UNDERBODY ....................................................297