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

Hyundai Elantra AD (2016-2020) 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 (A).

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
1.
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
Description Body Control Module (BCM) function NoItemDescription1Washer Linked Wiper - If the washer switch is pressed ON for 0.06~0.2 second with the vehicle mode in IGN2, the wiper rela ...

IMS(Integrated Memory System)
...

Other information:

Hyundai Elantra AD (2016-2020) Service Manual: Schematic Diagrams
System Block Diagram Component Parts And Function Outline Component partFunctionVehicle-speed sensor, ESP/ABS Control ModuleConverts vehicle speed to pulse.ECMReceives signals from sensor and control switches.Cruise control indicatorIlluminate when CRUISE main switch is ON (Built into cluster)Cr ...

Hyundai Elantra AD (2016-2020) Service Manual: Alternator Schematic Diagrams
Circuit Diagram     • COM signal - When controlling the voltage generated, the ECM sends the target voltage data to the alternator via a PWM signal.(High voltage: 4V or higher, low voltage: 2V or lower) • FR signal - The transistor activation signal inside t ...

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