Kia Optima DL3: Rear Glass Defogger / Rear Glass Defogger Switch

Repair procedures

Inspection
1.

In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (KDS).

The diagnostic system (KDS) provides the following information.

(1)

Self diagnosis : Checking failure and code number (DTC).

(2)

Current data : Checking the system input/output data state.

(3)

Actuation test : Checking the system operation condition.

(4)

Additional function : Controlling other features including system option setting and zero point adjustment.

2.

Select the 'Car model' and the 'IBU-BCM' to be checked in order to check the vehicle with the tester.

3.

Select the 'Current Data' menu to search the current state of the input/output data.

4.

To force actuate the input value of the module to be checked, select option 'Actuation Test'

Removal
1.

Disconnect the negative battery terminal.

2.

Remove the heater and A/C control unit.

(Refer to Heating, Ventilation, Air conditioning -"Heater & Control Unit (Manual)")

(Refer to Heating, Ventilation and Air Conditioning - "Heater & A/C Control Unit (DATC)")

(Refer to Heating, Ventilation and Air Conditioning - "Heater Control Unit")

Installation
1.

Install in the reverse order of removal.

    Repair procedures Inspection    • Wrap tin foil around the end of the voltmeter test lead to prevent damaging the heater line.

    Other information:

    Kia Optima DL3 2019-2026 Service and Repair Manual: Smart Key Diagnostic

    Repair procedures Inspection 1. In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (KDS). The diagnostic system (KDS) provides the following information. (1) Self diagnosis : Checking failure and code number (DTC).

    Kia Optima DL3 2019-2026 Service and Repair Manual: A/C Pressure Transducer

    Description and operation Description The A/C Pressure Transducer (APT) converts the pressure value of high pressure line into voltage value after measuring it. By converted voltage value, engine ECU controls the cooling fan by operating it high speed or low speed.

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