Hyundai Sonata LF: BCM (Body Control Module) / Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Body Electrical System / BCM (Body Control Module) / Repair procedures

Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the center facia panel.
(Refer to Heating, Ventilation and Air Conditioning - "Controller")
3.
Disconnect the body control module connectors (A).

4.
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 crash pad center panel.
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 relay is turned ON 0...

    IMS(Integrated Memory System)

    ..

    Other information:

    Hyundai Sonata LF 2014-2019 Service Manual: Cowl Side Trim Components and Components Location


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    Hyundai Sonata LF 2014-2019 Service Manual: Troubleshooting


    Troubleshooting Ignition System SymptomSuspect AreaRemedyEngine will not start or is hard to start (Cranks OK)Ignition lock switchInspect ignition lock switch, or replace as requiredIgnition coilInspect ignition coil, or replace as requiredSpark plugsInspect spark plugs, or replace as requiredIgnition wiring disconnected or brokenRepair wiring, or replace as requiredRough idle or stallsIgnition wiringRepair wiring, or replace as requiredIgnition coilInspect ignition coil, or replace as requiredEngine hesitates/poor accelerationSpark plugs and spark plug cablesInspect spark plugs / cable, or replace as requiredIgnition wiringRepair wiring, or replace as requiredPoor mileageSpark plugs and spark plug cablesInspect spark plugs / cable, or replace as required Charging System SymptomSuspect AreaRemedyCharging warning indicator does not light with ignition switch "ON" and engine off...

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