relay INFINITI M35 2007 Factory Service Manual

LT-294
ILLUMINATION
Revision: 2007 April2007 M35/M45
ILLUMINATION OPERATION BY LIGHTING SWITCH
With the lighting switch in the 1ST or 2ND position (or if the auto light system is activated), the BCM receives
input signal requesting the illumination lamps to illuminate. This input signal is communicated to the IPDM E/R
across the CAN communication lines. The CPU located in the IPDM E/R controls the tail lamp relay coil,
which, when energized, directs power

through IPDM E/R terminal 21

to combination meter terminal 13

to LDW switch (illumination) terminal 5 (with lane departure warning)

to VDC off switch (illumination) terminal 3

to trunk lid opener switch (illumination) terminal 3

to combination switch (spiral cable) terminal 24

to door mirror remote control switch (illumination) terminal 16

to AFS switch (illumination) terminal 5 (with AFS)

to rear sunshade front switch (illumination) terminal 5 (with rear control switch)

to A/T illumination terminal 1

to snow mode switch (illumination) terminal 5 (AWD models)

to rear control cancel switch (illumination) terminal 4 (with rear control switch)

to clock terminal 3

to multifunction switch terminal 3

to audio unit terminal 9

to DVD player terminal 18 (with DVD player)

to NAVI control unit terminal 61 (with navigation system)

to AV control unit terminal 61 (without navigation system)

to climate controlled seat switch driver side (illumination) terminal 7 (with climate controlled seat)

to climate controlled seat switch passenger side (illumination) terminal 7 (with climate controlled seat)

to ashtray illumination (rear LH) terminal 1

to ashtray illumination (rear RH) terminal 1

to illumination control switch terminal 1

to cigarette lighter socket (illumination) terminal 2

to map lamp (illumination) terminal 8

to power window main switch illumination terminal 1

to glove box lamp terminal 1

to rear control switch terminal 2

to rear power seat switch RH (illumination) terminal 4 (with rear control switch)

to rear heated seat switch RH (illumination) terminal 7 (with rear control switch)

to rear sunshade cancel relay terminal 6 (with rear control switch)

to automatic return cancel switch (illumination) terminal 4 (with rear control switch)

to rear power seat switch LH (illumination) terminal 4 (with rear control switch) and

to rear heated seat switch LH (illumination) terminal 7 (with rear control switch),

through Intelligent Key unit terminal 12

to push button ignition switch (illumination) terminal 3.
Ground is supplied

to combination meter terminal 14

to combination meter terminal 9, 10 and 11

to push button ignition switch (illumination) terminal 2

to LDW switch (illumination) terminal 4 (with lane departure warning)

to VDC off switch (illumination) terminal 4

to trunk lid opener switch (illumination) terminal 4

to combination switch (spiral cable) terminal 25

ILLUMINATION
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to door mirror remote control switch (illumination) terminal 15

to AFS switch (illumination) terminal 6 (with AFS)

to rear sunshade front switch (illumination) terminal 6 (with rear control switch)

to A/T illumination terminal 2

to snow mode switch (illumination) terminal 6 (ADW models)

to rear control cancel switch (illumination) terminal 5 (with rear control switch)

to clock terminal 4

to multifunction switch terminal 4

to audio unit terminal 8

to DVD player terminal 17 (With DVD player)

to climate controlled seat switch driver side (illumination) terminal 8 (with climate controlled seat) and

to climate controlled seat switch passenger side (illumination) terminal 8 (with climate controlled seat)

through illumination control switch terminal 2

to illumination control switch terminal 3

through grounds M16 and M70,

to cigarette lighter socket (illumination) terminal 1

to map lamp (illumination) terminal 4

to power window main switch illumination terminal 2 and

to glove box lamp terminal 2

through grounds M16 and M70,

to ashtray illumination (rear RH) terminal 2

through grounds B402, B405,

to ashtray illumination (rear LH) terminal 2

to automatic return cancel switch (illumination) terminal 2 (With rear control switch)

to rear power seat switch LH (illumination) terminal 3 (With rear control switch)

to rear heated seat switch LH (illumination) terminal 8 (With rear control switch)

through grounds B5, B40 and B131,

through rear sunshade cancel relay terminal 7(With rear control switch)

to rear sunshade rear switch (illumination) terminal 7 (With rear control switch)

through grounds B5, B40, B131 and B559.

to rear control switch terminal 4

to rear power seat switch RH (illumination) terminal 3 (With rear control switch)

to rear heated seat switch RH (illumination) terminal 8 (With rear control switch)

through grounds B5, B40, B131 and B559.
With power and ground supplied, illumination lamps illuminate.
EXTERIOR LAMP BATTERY SAVER CONTROL
BCM activates the exterior lamp battery saver control function and turns off the exterior lamps to prevent bat-
tery from over discharge when the combination switch (lighting switch) is in 1ST or 2ND position and/or the
front fog lamp switch ON and the door lock operation is performed by keyless entry system.
CAN Communication System DescriptionNKS003TI
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 UnitNKS003TJ
Refer to LAN-50, "CAN System Specification Chart" .

PG-1
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
K ELECTRICAL
CONTENTS
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POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
POWER SUPPLY ROUTING CIRCUIT ...................... 3
Schematic ................................................................ 3
Wiring Diagram — POWER — ................................. 5
BATTERY POWER SUPPLY — IGNITION SW.
IN ANY POSITION ................................................ 5
ACCESSORY POWER SUPPLY — IGNITION
SW. IN “ACC” OR “ON” ........................................ 11
IGNITION POWER SUPPLY — IGNITION SW.
IN “ON” AND/OR “START” .................................. 12
Fuse ....................................................................... 17
Fusible Link ............................................................ 17
Circuit Breaker ....................................................... 17
IPDM E/R (INTELLIGENT POWER DISTRIBUTION
MODULE ENGINE ROOM) ...................................... 18
System Description ................................................ 18
SYSTEMS CONTROLLED BY IPDM E/R ........... 18
CAN COMMUNICATION LINE CONTROL ......... 18
IPDM E/R STATUS CONTROL ........................... 19
CAN Communication System Description .............. 19
CAN Communication Unit ...................................... 19
Function of Detecting Ignition Relay Malfunction ... 19
CONSULT-II Function (IPDM E/R) ......................... 20
CONSULT-II BASIC OPERATION ....................... 20
SELF-DIAG RESULTS ........................................ 20
DATA MONITOR ................................................. 21
CAN DIAG SUPPORT MNTR ............................. 22
ACTIVE TEST ..................................................... 22
Auto Active Test ..................................................... 23
DESCRIPTION .................................................... 23
OPERATION PROCEDURE ............................... 23
INSPECTION IN AUTO ACTIVE TEST MODE ... 24
Schematic .............................................................. 27
IPDM E/R Terminal Arrangement ........................... 28
Check IPDM E/R Power Supply and Ground Circuit ... 29
Inspection with CONSULT-II (Self-Diagnosis) ........ 30
Removal and Installation of IPDM E/R ................... 31
REMOVAL ........................................................... 31
INSTALLATION ................................................... 31
PDU (POWER DISTRIBUTION UNIT) ...................... 32
Component Parts and Harness Connector Location ... 32System Description ................................................. 32
PUSH-BUTTON IGNITION SWITCH OPERAT-
ING PROCEDURE .............................................. 32
Wiring Diagram — PDU — ..................................... 34
Terminals and Reference Value for Intelligent Key
Unit ......................................................................... 36
Terminals and Reference Value for PDU ................ 37
Work Flow ............................................................... 37
Trouble Diagnosis Symptom Chart ......................... 38
Check CAN Communication System ...................... 38
Check PDU Power Supply and Ground Circuit ...... 39
Check Push-Button Ignition Switch (Ignition Switch)
System .................................................................... 39
Check Push-Button Ignition Switch (Indicator Cir-
cuit) System ............................................................ 41
PDU Communication Circuit System 1 ................... 42
PDU Communication Circuit System 2 ................... 43
Removal and Installation of PDU ............................ 44
REMOVAL ........................................................... 44
INSTALLATION ................................................... 44
GROUND ................................................................... 45
Ground Distribution ................................................. 45
MAIN HARNESS ................................................. 45
ENGINE ROOM HARNESS ................................ 50
ENGINE CONTROL HARNESS/VQ ENGINE
MODELS ............................................................. 54
ENGINE CONTROL HARNESS/VK ENGINE
MODELS ............................................................. 55
BODY HARNESS ................................................ 56
BODY NO. 2 HARNESS ..................................... 60
HARNESS ................................................................. 62
Harness Layout ...................................................... 62
HOW TO READ HARNESS LAYOUT ................. 62
OUTLINE ............................................................. 63
MAIN HARNESS ................................................. 64
NAVIGATION SUB-HARNESS & A/C HARNESS ... 69
ENGINE ROOM HARNESS ................................ 70
ENGINE CONTROL HARNESS (VQ ENGINE) ... 77
ENGINE CONTROL HARNESS (VK ENGINE) ... 80
BODY HARNESS ................................................ 83

PG-2Revision: 2007 April2007 M35/M45 BODY NO. 2 HARNESS ...................................... 87
TAIL HARNESS ................................................... 91
ROOM LAMP HARNESS .................................... 92
FRONT DOOR HARNESS .................................. 93
REAR DOOR HARNESS .................................... 94
Wiring Diagram Codes (Cell Codes) ....................... 95
ELECTRICAL UNITS LOCATION ............................. 98
Electrical Units Location ......................................... 98
ENGINE COMPARTMENT .................................. 98
PASSENGER COMPARTMENT ........................100
LUGGAGE COMPARTMENT ............................103
HARNESS CONNECTOR .......................................104
Description ............................................................104
HARNESS CONNECTOR (TAB-LOCKING
TYPE) ................................................................104
HARNESS CONNECTOR (SLIDE-LOCKING TYPE) ................................................................105
HARNESS CONNECTOR (LEVER LOCKING
TYPE) ................................................................106
ELECTRICAL UNITS ..............................................107
Terminal Arrangement ...........................................107
SMJ (SUPER MULTIPLE JUNCTION) ....................109
Terminal Arrangement ...........................................109
STANDARDIZED RELAY ........................................112
Description ............................................................112
NORMAL OPEN, NORMAL CLOSED AND
MIXED TYPE RELAYS ......................................112
TYPE OF STANDARDIZED RELAYS ................112
FUSE BLOCK - JUNCTION BOX (J/B) ..................114
Terminal Arrangement ...........................................114
FUSE, FUSIBLE LINK AND RELAY BOX ..............115
Terminal Arrangement ...........................................115

PG-18
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: 2007 April2007 M35/M45
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PFP:284B7
System DescriptionNKS004E2

IPDM E/R (Intelligent Power Distribution Module Engine Room) integrates the relay box and fuse block
which were originally placed in engine compartment. It controls integrated relay via IPDM E/R control cir-
cuit.

IPDM E/R-integrated control circuit performs ON-OFF operation of relay, CAN communication control and
oil pressure switch signal reception, etc.

It controls operation of each electrical part via ECM, BCM and CAN communication lines.
CAUTION:
None of the IPDM E/R-integrated relays can be removed.
SYSTEMS CONTROLLED BY IPDM E/R
1. Lamp control
Using CAN communication, it receives signal from BCM and controls the following lamps:

Headlamps (HI, LO)

Tail, parking and license plate lamps

Front fog lamps
2. Daytime light relay control (for Canada models)
Using CAN communication, it receives signals from BCM and controls the daytime light relay.
3. Wiper control
Using CAN communication, it receives signals from BCM and controls the front wipers.
4. Rear window defogger relay control
Using CAN communication, it receives signals from BCM and controls the rear window defogger relay.
5. A/C compressor control
Using CAN communication, it receives signals from ECM and controls the A/C relay.
6. Cooling fan control
Using CAN communication, it receives signals from ECM and controls cooling fan via cooling fan control
module.
7. Horn control
Using CAN communication, it receives signals from BCM and controls horn relay.
8. Starter motor relay control
Using CAN communication, it receives signals from BCM and controls starter motor relay.
9. Alternator control
Using CAN communication, it receives signal from ECM and controls power generation voltage.
CAN COMMUNICATION LINE CONTROL
With CAN communication, by connecting each control unit using two communication lines (CAN L-line, CAN
H-line), it is possible to transmit maximum amount of information with minimum wiring. Each control unit can
transmit and receive data, and reads necessary information only.
1. Fail-safe control

When CAN communication with other control units is impossible, IPDM E/R performs fail-safe control.
After CAN communication recovers normally, it also returns to normal control.

Operation of control parts by IPDM E/R during fail-safe mode is as follows:
Controlled system Fail-safe mode
Headlamps

With the ignition switch ON, the headlamp low relay is ON.

With the ignition switch OFF, the headlamp low relay is OFF.
Tail, parking and
license plate lamps

With the ignition switch ON, the tail lamp relay is ON.

With the ignition switch OFF, the tail lamp relay is OFF.
Cooling fan

With the ignition switch ON, the cooling fan HI operates.

With the ignition switch OFF, the cooling fan stops.
Front wiperUntil the ignition switch is turned off, the front wiper LO and HI remains in the same status it was in just
before fail−safe control was initiated.

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
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IPDM E/R STATUS CONTROL
In order to save power, IPDM E/R switches status by itself based on each operating condition.
1. CAN communication status

CAN communication is normally performed with other control units.

Individual unit control by IPDM E/R is normally performed.

When sleep request signal is received from BCM, mode is switched to sleep transient status.
2. Sleep transient status

Process to stop CAN communication is activated.

All systems controlled by IPDM E/R are stopped. When 3 seconds have elapsed after CAN communi-
cation with other control units is stopped, mode switches to sleep status.
3. Sleep status

IPDM E/R operates in low power mode.

CAN communication is stopped.

When a change in CAN communication line is detected, mode switches to CAN communication status.

When a change hood switch or ignition switch signal is detected, mode switches to CAN communica-
tion status.
CAN Communication System DescriptionNKS004E3
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. Modern
vehicles are equipped with many electronic control units 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.
CAN Communication UnitNKS004E4
Refer to LAN-50, "CAN System Specification Chart" .
Function of Detecting Ignition Relay MalfunctionNKS004E5

When contact point of integrated ignition relay is stuck and cannot be turned OFF, IPDM E/R turns ON tail
and parking lamps for 10 minutes to indicate ignition relay malfunction.

When a state of ignition relay having built-in does not agree with a state of Ignition switch signal input by a
CAN communication from BCM, IPDM E/R lets tail lamp relay operate.
NOTE:
When the ignition switch is turned ON, the tail lamps are OFF.
Rear window defogger Rear window defogger relay OFF
A/C compressor A/C relay OFF
Front fog lamps Front fog lamp relay OFF Controlled system Fail-safe mode
Ignition switch signal Ignition relay status Tail lamp relay
ON ON —
OFF OFF —
ON OFF —
OFF ON ON (10 minutes)

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
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DATA MONITOR
Operation Procedure
1. Touch “DATA MONITOR” on “SELECT MONITOR ITEM ” screen.
2. Touch “ALL SIGNALS”, “MAIN SIGNALS” or “SELECTION FROM MENU” on the “DATA MONITOR”
screen.
3. Touch the required monitoring item on “SELECTION FROM MENU”. In “ALL SIGNALS”, all items are
monitored. In “MAIN SIGNALS”, predetermined items are monitored.
4. Touch “START”.
5. Touch “RECORD” while monitoring to record the status of the item being monitored. To stop recording,
touch “STOP”.
All Signals, Main Signals, Selection From Menu
NOTE:

Perform monitoring of IPDM E/R data with the ignition switch ON. When the ignition switch is at ACC, the display may not be cor-
rect.

*1: Only the vehicle with day time light system operates. ALL SIGNALS All items will be monitored.
MAIN SIGNALS Monitor the predetermined item.
SELECTION FROM MENU Select any item for monitoring.
Item nameCONSULT-II
screen displayDisplay or unitMonitor item selection
Description
ALL
SIGNALSMAIN
SIGNALSSELECTION
FROM
MENU
Motor fan request MOTOR FAN REQ 1/2/3/4×× ×Signal status input from ECM
A/C Compressor
requestAC COMP REQ ON/OFF×× ×Signal status input from ECM
Tail & clearance
requestTAIL&CLR REQ ON/OFF×× ×Signal status input from BCM
Headlamp LO
requestHL LO REQ ON/OFF×× ×Signal status input from BCM
Headlamp HI
requestHL HI REQ ON/OFF×× ×Signal status input from BCM
Front fog lamp
request FR FOG REQ ON/OFF×× ×Signal status input from BCM
Front wiper request FR WIP REQSTOP/1LOW/
LOW/HI×× ×Signal status input from BCM
Wiper auto stop WIP AUTO STOP ACT P/STOP P×× ×Output status of IPDM E/R
Wiper protection WIP PROT OFF/BLOCK×× ×Control status of IPDM E/R
Starter request ST RLY REQ ON/OFF××Signal status input from BCM
Ignition relay status IGN RLY ON/OFF×× ×Ignition relay status monitored
with IPDM E/R
Rear window defog-
ger requestRR DEF REQ ON/OFF×× ×Signal status input from BCM
Oil pressure switch OIL P SW OPEN/CLOSE××Signal status input in IPDM E/R
Daytime running
light requestDTRL REQ
*1ON/OFF××Signal status input from BCM
Hood switch HOOD SW ON/OFF××Signal status input in IPDM E/R
Theft warning horn
requestTHFT HRN REQ ON/OFF××Signal status input from BCM
Horn chirp HORN CHIRP ON/OFF××Output status of IPDM E/R

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CAN DIAG SUPPORT MNTR
Refer to LAN-44, "CAN Diagnostic Support Monitor" in LAN section.
ACTIVE TEST
Operation Procedure
1. Touch “ACTIVE TEST” on “SELECT DIAG MODE” screen.
2. Touch item to be tested.
3. Touch “START”, and confirm its operation.
4. Touch “STOP” while testing to stop the operation.
Test item CONSULT-II screen display Description
Tail lamp operation TAIL LAMP With a certain ON-OFF operation, the tail lamp relay can be operated.
Rear window defogger oper-
ationREAR DEFOGGERWith a certain ON-OFF operation, the rear window defogger relay can
be operated.
Front wiper (HI, LO) opera-
tionFRONT WIPERWith a certain operation (OFF, HI ON, LO ON), the front wiper relay
(Lo, Hi) can be operated.
Cooling fan operation MOTOR FAN With a certain operation (1, 2, 3, 4), the cooling fan can be operated.
Lamp (HI, LO, FOG) opera-
tionLAMPSWith a certain operation (OFF, HI ON, LO ON, FOG ON), the lamp
relay (Lo, Hi, Fog) can be operated.
Horn operation HORN Push “ON” button, horn relay operates 20ms.

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
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Concept of Auto Active Test

IPDM E/R actuates auto active test mode when it receives door switch signal from BCM via CAN commu-
nication line. Therefore, when auto active test mode is activated successfully, CAN communication
between IPDM E/R and BCM is normal.

If any of systems controlled by IPDM E/R cannot be operated, possible cause can be easily diagnosed
using auto active test.
Diagnosis chart in auto active test mode
PKIC0274E
Symptom Inspection contents Possible cause
Any of front wipers,
tail lamps, parking
lamps, front fog
lamps, and head
lamps (HI, LO) do not
operate.Perform auto active
test. Does system
in question oper-
ate?YES

BCM signal input system malfunction
NO

Lamp/wiper motor malfunction

Lamp/wiper motor ground circuit malfunction

Harness/connector malfunction between IPDM E/R and system in question

IPDM E/R (integrated relay) malfunction
Rear window defog-
ger does not operate.Perform auto active
test. Does rear win-
dow defogger oper-
ate?YES

BCM signal input circuit malfunction
NO

Rear window defogger relay malfunction

Harness/connector malfunction between IPDM E/R and rear window defogger
relay

Open circuit of rear window defogger

IPDM E/R malfunction
A/C compressor does
not operate.Perform auto active
test. Does magnetic
clutch operate?YES

BCM signal input circuit malfunction

CAN communication signal malfunction between BCM and ECM.

CAN communication signal malfunction between ECM and IPDM E/R
NO

Magnetic clutch malfunction

Harness/connector malfunction between IPDM E/R and magnetic clutch

IPDM E/R (integrated relay) malfunction

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IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: 2007 April2007 M35/M45
Cooling fan does not
operate.Perform auto active
test. Does cooling
fan operate?YES

ECM signal input circuit malfunction

CAN communication signal malfunction between ECM and IPDM E/R
NO

Cooling fan motor malfunction

Harness/connector malfunction between cooling fan motor and cooling fan
control module

Cooling fan control module malfunction

Harness/connector malfunction between IPDM E/R and cooling fan control
module

Cooling fan relay malfunction

Harness/connector malfunction between IPDM E/R and cooling fan relay

IPDM E/R malfunction
Oil pressure warning
lamp does not oper-
ate.Perform auto active
test. Does oil pres-
sure warning lamp
blink?YES

Harness/connector malfunction between IPDM E/R and oil pressure switch

Oil pressure switch malfunction

IPDM E/R malfunction
NO

CAN communication signal malfunction between IPDM E/R and unified meter
and A/C amp.

Combination meter malfunction Symptom Inspection contents Possible cause