Nissan GT-R. Manual - part 234

PCS

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

PCS-17

< REMOVAL AND INSTALLATION >

[IPDM E/R]

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REMOVAL AND INSTALLATION

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE
ROOM)

Exploded View

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Removal and Installation

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CAUTION:

IPDM E/R integrated relays are not serviceable parts, and must not be removed from the unit.

REMOVAL

1.

Remove the battery. Refer to 

PG-99, "Exploded View"

.

2.

Remove the cowl top cover (RH). Refer to 

EXT-26, "Exploded View"

.

3.

Pull up the IPDM E/R assembly while pressing the pawls (A) on
the back of the IPDM E/R cover B (1).

1.

IPDM E/R cover A

2.

IPDM E/R

3.

IPDM E/R cover B

4.

Bracket

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< REMOVAL AND INSTALLATION >

[IPDM E/R]

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

4.

Remove the IPDM E/R cover A (1) while pressing the pawls (A)
at the lower end of the IPDM E/R cover A.

5.

Disconnect the harness connector. And then remove the IPDM
E/R (1).

6.

Remove the nuts (A). And then remove the bracket (1) from the
vehicle.

INSTALLATION

Install in the reverse order of removal.

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PCS

POWER DISTRIBUTION SYSTEM

PCS-19

< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

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SYSTEM DESCRIPTION

POWER DISTRIBUTION SYSTEM

System Description

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• PDS (POWER DISTRIBUTION SYSTEM) is the system that BCM controls with the operation of the push-

button ignition switch and performs the power distribution to each power circuit. This system is used instead
of the mechanical power supply changing mechanism with the operation of the conventional key cylinder.

• The push-button ignition switch can be operated when Intelligent Key is in the following condition. Refer to

Engine Start Function for details.

- Intelligent Key is in the detection area of the inside key antenna
- Insert Intelligent Key into the key slot
- Insert key fob into the key slot
• The push-button ignition switch operation is input to BCM as a signal. BCM changes the power supply posi-

tion according to the status and operates the following relays to supply power to each power circuit.

- Ignition relay (built into IPDM E/R)
- Ignition relay (inserted into fuse block)
- ACC relay
- Blower relay

NOTE:
The engine switch operation changes due to the conditions of brake pedal, shift lever position and vehicle
speed.

• The power supply position can be confirmed with the illuminating of the indicators around the push-button

ignition switch.

BATTERY SAVER SYSTEM

When all of the following conditions are met for 60 minutes, the battery saver system will cut off the power sup-
ply to prevent battery discharge.
• The ignition switch is in the ACC position
• All doors are closed
• Shift lever is in the P position

Reset Condition of Battery Saver System

In order to prevent the battery from discharging, the battery saver system will cut off the power supply when all
doors are closed, the shift lever is in the P position and the ignition switch is left in the ACC position for 60 min-
utes. If any of the following conditions are met the battery saver system is released and the steering will
change automatically to the LOCK position from the OFF position.
• Opening any door
• Operating with door key cylinder on door lock
• Operating with request switch on door lock
• Operating with Intelligent Key on door lock
Press push-button ignition switch and ignition switch will change to the ACC position from the OFF position.

STEERING LOCK OPERATION

Steering is locked by steering lock unit when ignition switch is in the OFF position, shift lever shift is in the P
position and any of the following conditions are met.
• Opening door
• Closing door
• Door is locked with request switch
• Door is locked with Intelligent Key

POWER SUPPLY POSITION CHANGE TABLE BY PUSH-BUTTON IGNITION SWITCH OPERA-
TION

The power supply position changing operation can be performed with the following operations.
NOTE:
• When an Intelligent Key is within the detection area of inside key antenna and when it is inserted to the key

slot, it is equivalent to the operations below.

• When starting the engine, the BCM monitors under the engine start conditions,
- Brake pedal operating condition
- Shift lever position
- Vehicle speed

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< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

POWER DISTRIBUTION SYSTEM

Vehicle speed: less than 4 km/h (2.5 MPH)

Vehicle speed: 4 km/h (2.5 MPH) or more

Emergency stop operation

• Press and hold the push-button ignition switch for 2 seconds or more.

• Press the push-button ignition switch 3 times or more within 1.5 seconds.

Power supply position

Engine start/stop condition

Push-button ignition switch 

operation frequency

Shift lever position

Brake pedal operation condition

LOCK 

→

 ACC

—

Not depressed

1

LOCK 

→

 ACC 

→

 ON

—

Not depressed

2

LOCK 

→

 ACC 

→

 ON 

→

 OFF

—

Not depressed

3

LOCK 

→

 START

ACC 

→

 START

ON 

→

 START

P or N position

Depressed

1

Engine is running 

→

 OFF

—

—

1

Power supply position

Engine start/stop condition

Push-button ignition switch 

operation frequency

Shift lever position

Brake pedal operation condition

Engine is running 

→

 ACC 

—

—

Emergency stop operation

Engine stall return operation while 
driving 

N position

Not depressed

1