System Diagram

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

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)

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.

The A/C auto amp. transmits the ECV control signal to the IPDM E/R via CAN communication.

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
  • Daytime running light system: Refer to System Description
  • Parking, license plate and tail lamp system: Refer to System Description .
• 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 .
• 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. via CAN communication. Refer to System Description .