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System Description

SYSTEM DIAGRAM

GNSDB47545

Courtesy of NISSAN

Description

Component	Function
Smart FET	Refer to Component Description .
Headlamp (HI)	The IPDM E/R supplies power supply voltage to each lamp, and turns the each lamp ON.
Headlamp (LO)
Parking lamp
Tail lamp, license plate lamp
Daytime running light
Front fog lamp
A/C compressor (magnetic clutch)	The IPDM E/R supplies power supply voltage to the A/C compressor (magnetic clutch), and turns the magnet clutch ON.
Cooling fan module	The IPDM E/R controls each actuator.
Compressor (ECV)	The IPDM E/R controls each actuator.

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication lines is shown in the following table:

Component parts	Signal description
BCM	The BCM transmits the ON/OFF request signal for each lamp to IPDM E/R via CAN communication.
ECM	The ECM calculates the cooling level, and transmits the cooling fan speed request signal to the IPDM E/R via CAN communication. The ECM transmits the A/C compressor request signal to the IPDM E/R via CAN communication according to the status of the engine and refrigerant pressure.
A/C auto amp. 1	The A/C auto amp. 1 or A/C amp. 2 transmits the ECV control signal to the IPDM E/R via CAN communication.
A/C amp. 2
IPDM E/R	The IPDM E/R controls the Smart FET to control each lamp according to the control signal status of each lamp received from the BCM via CAN communication. Refer to the following: Headlamp system: Refer to System Description (halogen headlamps) or System Description (LED headlamps). Daytime running light system: Refer to System Description (LED headlamps). Parking, license plate and tail lamp system: Refer to System Description (halogen headlamps) or System Description (LED headlamps). Front fog lamp system: Refer to System Description (LED headlamps). The IPDM E/R controls the Smart FET to control the A/C compressor (magnetic clutch) according to the A/C compressor request signal received from the ECM via CAN communication. Refer to System Description (automatic A/C) or System Description (manual A/C). The IPDM E/R controls the cooling fan module according to the cooling fan speed request signal received from the ECM via CAN communication. Refer to System Description . The IPDM E/R controls the ECV (Electrical Control Valve) according to the ECV control signal received from the A/C auto amp. 1 or A/C amp. 2 via CAN communication. Refer to System Description (automatic A/C) or System Description (manual A/C).

1: Automatic A/C

2: Manual A/C