2007 INFINITI M35 B engine

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PG-31
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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)
PG-33
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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)
PG-37
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Revision: 2007 April2007 M35/M45
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

PG-50
GROUND
Revision: 2007 April2007 M35/M45
ENGINE ROOM HARNESS
CKIT0671E

PG-54
GROUND
Revision: 2007 April2007 M35/M45
ENGINE CONTROL HARNESS/VQ ENGINE MODELS
CKIT0675E

GROUND
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Revision: 2007 April2007 M35/M45
ENGINE CONTROL HARNESS/VK ENGINE MODELS
CKIT0676E