KIA Niro: Relay Box (Passenger Compartment)

IGPM

Description

Communication Network Diagram

Integrated Gateway & Power control Module (IGPM)

Integrated Gateway & Power control Module (IGPM) is a module that performs the function of conventional Junction Block and some functions of BCM.

It controls various components including lamps by using CAN communication and IPS (replacing the function of fuse and relay) or ARISU.

IPS stands for Intelligent Power Switch, which uses the semiconductor technology to replace the current role of fuse and relay. (The IPS chip has two functions: 1) the high current-based component control; 2) component protection from overcurrent.)

Warning

The advantages of IPS are as follows:

• Reduce relay and consequently decrease weight and volume
• Remove the relay operation noise
• No need to replace fuses and increase the product life
• Capable to diagnose faulty parts

IGPM control entry

1. Switch signal input

(1) Assist the door switch

Driver's seat belt switch

Rear left door switch

Rear right door switch

IGN1 switch

IGN2 switch

Brake fluid sensor

Tailgate open switch

Tailgate lid handle switch

Hazard lamp switch

Head lamp low beams switch

Hood switch

Left front / rear turn signal switch

Right front / rear turn signal switch

Parking brake switch

Driver the door lock/unlock control status

Assist the door lock/unlock control status

Rear left the door lock/unlock status

Rear right the door lock/unlock status

Driver the door switch

Driver the door key lock switch

Driver the door key unlock switch

Driver the door power window lock switch

Driver the door power window unlock switch

(2) IPS&ARISU

Left Head lamp low beams

Right Head lamp low beams

Left Head lamp high beams

Right Head lamp high beams

Room lamp

Exterior left tail lamp

Exterior right tail lamp

Left front / rear turn signals

Right front / rear turn signals

Body resistance cut control

Front left static bending light

Front right static bending light

(3) Relay Control

Tailgate lid relay

Door lock/unlock relay

Power window wake-up relay

2. IGPM protection

(1) PCL (Programmable Current Limit) functions

• PCL replaces the junction block function of protecting wires.
• How to operate : If the lamp current exceeds the standard level, cut off the current to protect the lamp.
• Lamp cut off time : 300ms or less.
• Applied components: all lamp components controlled by IGPM
• Output the error code according to the error detection conditions.

(2) OCL (Open Current Limit)

• OCL detects the lamp open state and informs the user of it.
• How to operate: Detect the current of the lamp and if it is below the standard level, change the lamp operation.
• Applied components: 4 turn signal lamps.
• Output the error code according to the error detection conditions

3. IGPM fail safe function

(1) When the MCU is out of order (not operating due to a physical or electrical shock from the outside), and IGN2 and head lamp low switch are on, IGPM forces the head lamp low and exterior/interior lamps to turn on in order to secure the driver's safety.

(2) When the data transmission/reception fails due to a failed CAN communication line connected with IGPM module (disconnection of both high and low line, high/low BAT short, high/low GND short), the head lamp low and interior/exterior tail lamps are forced to turn on if IGN2 is on and the head lamp low switch is on.

4. Auto Cut System of Dark Current

(1) Description : It cuts automatically power to be provided with components for reducing useless dark current according to vehicle state.

(2) IGPM had 3 modes, "Normal Mode", "Sleep Mode", "Power Off Mode". Auto cut of dark current practice in "Sleep Mode".

• "Sleep" condition: IG OFF, consistent state of the input switch during a certain time, non-operation state of the CAN network.
• "Sleep" deactivation condition: switch inputs, operation state of the CAN network, KEY ON, POWER ON.
• "Power off" condition: In the dark current automatic cutoff function, the timer set for cutting the power load runs out.
• "Normal Mode" : IGPM function normally activates.
• "Sleep Mode" : It is low power mode and activates for reducing electricity consumption of IGPM. Auto cut of dark current function activates.
• "Power OFF Mode" : Power of MCU and circumferential circuit is cut for minimizing electricity consumption. Operation stops.

(3) The explanation - The auto cut of dark current

(4) Possible problems in case of the fuse switch setting errors

: If a fuse switch is set to OFF(Before delivering to customer) by a customer or technician and auto cut function of dark current activates, the following problems may occur.

* If fuse switch OFF(before delivering to customer) is set, power of BCM, Digital clock and audio is shut off.

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