2007 INFINITI M35 lock

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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Revision: 2007 April2007 M35/M45
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

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
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Revision: 2007 April2007 M35/M45
Removal and Installation of IPDM E/RNKS004EC
: Vehicle front
REMOVAL
1. Remove cowl top cover (RH). Refer to EI-18, "COWL TOP" .
2. Disengage pawls (A) on both side of IPDM E/R cover B (1),
remove IPDM E/R cover A (2).
3. While pushing pawl (A) on backside of IPDM E/R cover B (1)
toward vehicle front to unlock, lift up IPDM E/R (2).
4. Disengage pawls on both side of IPDM E/R (1), remove IPDM E/
R cover B.
5. Remove harness connector from IPDM E/R (1) and remove
IPDM E/R (1).
INSTALLATION
Installation is the reverse order of removal.
SKIB4109E
SKIB4110E
SKIB4111E

PG-32
PDU (POWER DISTRIBUTION UNIT)
Revision: 2007 April2007 M35/M45
PDU (POWER DISTRIBUTION UNIT)PFP:285F1
Component Parts and Harness Connector LocationNKS004ED
System DescriptionNKS004EE

PDU (Power Distribution Unit) is the unit that executes the power distribution with the control signal from
the Intelligent Key unit, instead of the mechanical power supply mechanism by conventional key cylinder.

The push-button ignition switch is operable when the Intelligent Key is within the detention area of the
interior antenna or is inserted to the key slot.

The push-button ignition switch operation is input to the Intelligent Key unit as a request signal. Then, the
Intelligent Key unit processes the request signal and orders the PDU to switch into the appropriate power
supply position.
NOTE:
The prerequisite for starting the engine varies by the state of brake pedal, A/T selector lever, and vehicle
speed.

PDU distributes power to each power supply circuit according to the request signal received.

The power supply position can be confirmed by illumination of the indicators in the upper surroundings of
the push-button ignition switch.
PUSH-BUTTON IGNITION SWITCH OPERATING PROCEDURE
The power supply position switching operation can be performed by the following operation.
NOTE:

When an Intelligent Key is within the detection area of inside antenna and when it is inserted to the key
slot, it is equivalent to the operations below.

When starting the engine, the Intelligent Key unit monitors the engine start conditions (brake pedal operat-
ing condition, A/T selector lever position, and vehicle speed).
1. Fuse block (J / B) fuse layout 2. Fuse and fusible link box 3. PDU (power distribution unit)
M30,M31
4. Intelligent key unit M32,M33 5. Push-button ignition switch M27
PIIB6094E

PDU (POWER DISTRIBUTION UNIT)
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Revision: 2007 April2007 M35/M45

Unless each start condition is fulfilled, the engine will not response regardless of how many times the
push-button ignition switch is pushed. At that time, illumination repeats the position in the order of LOCK
→ ACC → ON → LOCK.
*1: When the A/T selector lever position is N position, the engine start condition is different according to the vehicle speed.

At vehicle speed of 5 km/h or less, the engine can start only when the brake pedal is depressed.

At vehicle speed of 5 km/h or more, the engine can start even if the brake pedal is not depressed. (It is the same as “Engine stall
return operation while driving”.)
*2: When the A/T selector lever position is any position other than P position and when the vehicle speed is 5 km/h or more, the engine
stop condition is different.

Press and hold the push-button ignition switch for 2 seconds or more. (When the push-button ignition switch is pressed for too short
a time, the operation may be invalid, so properly press and hold to prevent the incorrect operation.)

Press the push-button ignition switch 3 times within 1.5 seconds. (Emergency stop operation)Power supply positionEngine start/stop condition Push-button ignition
switch operation fre-
quency Brake pedal operation condition A/T selector lever position
LOCK → ACCNot depressed
(When A/T selector lever is in any posi-
tion other than P or N, there will be no
effect even if it is depressed.)Any position other than P or N
(When the brake pedal is not
depressed, there will be no effect even
if the A/T selector lever is in P or N
position.)1
LOCK → ACC → ONNot depressed
(When A/T selector lever is in any posi-
tion other than P or N, there will be no
effect even if it is depressed.)Any position other than P or N
(When the brake pedal is not
depressed, there will be no effect even
if the A/T selector lever is in P or N
position.)2
LOCK → ACC → ON
→ LOCKNot depressed
(When A/T selector lever is in any posi-
tion other than P or N, there will be no
effect even if it is depressed.)Any position other than P or N
(When the brake pedal is not
depressed, there will be no effect even
if the A/T selector lever is in P or N
position.)3
LOCK → START
ACC → START
ON → START
(Engine start)Depressed P or N position (*1)1
[If the switch is
pushed once, the
engine starts from
any power supply
position (LOCK,
ACC, and ON)]
Engine start condition
→ LOCK
(Engine stop)— P position 1
Engine start condition
→ ACC
(Engine stop)— Any position other than P (*2) 1
Engine stall return
operation while driving— N position 1

PG-36
PDU (POWER DISTRIBUTION UNIT)
Revision: 2007 April2007 M35/M45
Terminals and Reference Value for Intelligent Key UnitNKS004EG
Termi-
nalWire
ColorItemSignal
Input/
OutputCondition
Voltage (V)
Approx. Ignition
Switch
PositionOperation or Conditions
1 SB Power source (Fuse) Input LOCK — Battery voltage
3 Y IPDM E/R status signal Output —Engine starting (During Cranking) 5
Other than above 2
8WPush-button ignition
switch
(LOCK LED)InputLOCKPush-button ignition switch is in LOCK
position0
—Push-button ignition switch is in any posi-
tion
(Except LOCK position)1.2
9LPush-button ignition
switch
(ACC LED)InputACCPush-button ignition switch is in ACC posi-
tion0
—Push-button ignition switch is in any posi-
tion
(Except ACC position)1.2
10 VPush-button ignition
switch
(ON LED)InputONPush-button ignition switch is in ON posi-
tion0
—Push-button ignition switch is in any posi-
tion
(Except ON position)1.2
20 B Ground — — — 0
30 L/W Ignition switch (ACC) Input ACC — Battery voltage
31 GR Ignition switch (ON) Input ON — Battery voltage
34 R PDU feedback signal Output LOCKPush-button ignition switch is in LOCK
state, 30 seconds after all doors closed1
Other than above 0
36 W Ignition signal 2 InputLOCK — Battery voltage
ACC — Battery voltage
ON — 0
37 P CAN-LInput/
Output—— —
38 L CAN-HInput/
Output—— —
39 BR/W Push switch Input —Depress push-button ignition switch 0
Other than above Battery voltage
40 B Ground — — — 0
41 Y Power source (Fuse) Input LOCK — Battery voltage
42 P PDU wake up signal Output LOCKPush-button ignition switch is in LOCk
state, 30 seconds after all doors closedBattery voltage
Other than above 0
44 BR Ignition signal 1 InputLOCK — Battery voltage
ACC — Battery voltage
ON — 0
45 SB ACC signal InputLOCK — Battery voltage
ACC — 0
ON — 0
56 B Ground — — — 0

PDU (POWER DISTRIBUTION UNIT)
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Terminals and Reference Value for PDUNKS004EH
Work FlowNKS004EI
1. Check the symptom and customer's requests.
2. Understand outline of system. Refer to PG-32, "
System Description" .
3. Confirm that Intelligent Key system operates normally.
Refer to BL-24, "
POWER DOOR LOCK SYSTEM" .
4. Repair or replace any malfunctioning parts.
Refer to PG-38, "
Trouble Diagnosis Symptom Chart" .
5. INSPECTION END
57 L Power source (Fuse) Input LOCK — Battery voltage
72 B Ground — — — 0 Te r m i -
nalWire
ColorItemSignal
Input/
OutputCondition
Voltage (V)
Approx. Ignition
Switch
PositionOperation or Conditions
Termi-
nalWire
ColorItemSignal
Input/
OutputCondition
Voltage (V)
Approx. Ignition
Switch
PositionOperation or Conditions
1 P PDU wake up signal Output LOCKPush-button ignition switch is in LOCK
state, 30 seconds after all doors closeBattery voltage
Other than above 0
4 BR Ignition signal 1 OutputLOCK — Battery voltage
ACC — Battery voltage
ON — 0
5 W Ignition signal 2 OutputLOCK — Battery voltage
ACC — Battery voltage
ON — 0
8 SB ACC signal OutputLOCK — Battery voltage
ACC — 0
ON — 0
10 B Ground — — — 0
11 Y IPDM E/R status signal Input —Engine starting (During Cranking) 5
Other than above 2
12 R PDU feedback signal Input LOCKPush-button ignition switch is in LOCK
state, 30 seconds after all doors close1
Other than above 0
14 SB Power source (Fuse) Input LOCK — Battery voltage
15 L Power source (F/L) Input LOCK — Battery voltage
16 W ACC power output OutputLOCK — 0
ACC — Battery voltage
ON — Battery voltage
17 G Power source (Fuse) Input LOCK — Battery voltage
18 BR ON power output OutputLOCK — 0
ACC — 0
ON — Battery voltage

PDU (POWER DISTRIBUTION UNIT)
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Revision: 2007 April2007 M35/M45
Check Push-Button Ignition Switch (Indicator Circuit) SystemNKS004EN
1. CHECK PUSH-BUTTON IGNITION SWITCH INDICATOR SYSTEM
1. Turn ignition switch OFF.
2. Check voltage between Intelligent Key unit connector and
ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace push-button ignition switch.
2. PUSH-BUTTON IGNITION SWITCH INDICATOR POWER SUPPLY SIGNAL
1. Turn ignition switch OFF.
2. Disconnect push-button ignition switch.
3. Check voltage between push-button ignition switch connector
and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace push-button ignition switch.
Intelligent
Key unit
connectorTerminal
Push-button ignition
switch conditionVoltage (V)
(Approx)
(+) (-)
M328
Ground part of
push-button
ignition switchLOCK position 0
Except LOCK position 1.2
9ACC position 0
Except ACC position 1.2
10ON position 0
Except ON position 1.2
PIIB6121E
Push-button ignition
switch connectorTerminal
Voltage (V)
(Approx)
(+) (-)
M27 8 Ground Battery voltage
PIIB6122E