Hyundai Ioniq: BCM (Body Control Module) / Repair procedures

Hyundai Ioniq (AE) 2017-2025 Service Manual / Body Electrical System / BCM (Body Control Module) / Repair procedures

Removal

1.	Disconnect the negative (-) battery terminal.

2.	Remove the glove box. (Refer to Body - "Glove Box Upper Cover Assembly")

3.	Remove the smart key unit. (Refer to Body - "Smart Key Unit")

4.	Disconnect the body control module connectors (B).

5.	Remove the body control module (A) after loosening the mounting nuts.

Installation

1.	Install the body control module.

2.	Connect the body control module.

3.	Install the glove box upper cover assembly.

BCM Diagnosis with GDS

The body electrocal system can be quickly diagnosed failed parts with vehicle diagnostic system (GDS).

The diagnostic system (GDS) provides the following information.

(1)	Self examination : Checking the failure code (DTC) and display.

(2)	Current data : Checking the system input/output data state.

(3)	Actuator test : Checking the system operation condition.

(4)	Additional function : Other controlling such as he system option and zero point adjustment.

2.	Select the "Car Model" and the system to be checked in order to check the vehicle with the tester.

3.	Select the "Body Control Module (BCM)" to check body control module.

4.	Select the "Current Data" menu to search the current state of the input/output data. The input/output data for the sensors corresponding to the "Body Control Module (BCM)" can be checked.

5.	If you want to change user option, select "User Option".

Description and operation

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Rear Seats

Folding the rear seat

The rear seatbacks can be folded to facilitate carrying long items or to increase the luggage capacity of the vehicle.

WARNING

Never allow passengers to sit on top of the folded down seatback while the vehicle is moving. This is not a proper seating position and no seat belts are available for use. This could result in serious injury or death in case of an accident or sudden stop. Objects carried on the folded down seatback should not extend higher than the top of the front seatbacks. This could allow cargo to slide forward and cause injury or damage during sudden stops.