Hyundai Kona: Brake System / Stop Lamp Switch Repair procedures

Hyundai Kona (OS) 2018-2024 Service Manual / Brake System / Brake System / Stop Lamp Switch Repair procedures

Adjustment

1.	Turn ignition switch OFF and disconnect the negative (-) battery cable.

2.	Remove the lower crash pad. (Refer to Body - "Crash Pad")

Confirm the gap between stop lamp switch and bracket.

Stop lamp clearance (A) : 1.0 - 2.0 mm (0.04 - 0.08 in.)

4.	If the gap between stop lamp switch and bracket is not 1.0-2.0mm (0.04-0.08in), check the mounting clip and other part of around stop lamp.

5.	If there is normal, remove the stop lamp switch and then install again.

Inspection

1. Fuse inspection

Mount the test fuse to the switch fuse and relay fuse part to confirm a normal joint fit.

2. GDS Data Analysis

Analyze GDS data and confirm if there is anything wrong with the stop lamp switch.

(1)	Connect the GDS to the self-diagnosis connector.

(2)	Turn the spark switch on

(3)	Step on the brake pedal.

(4)

Inspect the "brake switch" category that displays the "sensor data" GDS.

Normal waveform : The pressure sensor signal value will change according to the brake ON/OFF switch.

3. Inspection of connector by each part

Check to see whether or not each connector has been damaged, or terminal surge, or incomplete connection has taken place

[Engine room junction box]

[ABS/VDC control module]

4. Inspect the stop lamp circuit

Connect probe to each terminal wire and confirm oscilloscope waveform.

[Stop lamp switch input/output]

[Oscilloscope waveform screen]

Removal

1.	Turn ignition switch OFF and disconnect the negative (-) battery cable.

2.	Remove the lower crash pad. (Refer to Body - "Crash Pad")

3.	Disconnect the stop lamp switch connector (A).

4.	Pull the locking plate (A) as indicated by the arrow.

5.	Turn stop lamp switch (A) 45° counterclockwise and remove it.

Inspect a removed stop lamp switch along the below procedures.

(1)

Confirm a normal connection with terminal part

–	A confirmation can be made to see if the connector has been secured properly and if a connection mark is present.

(2)

Perform the inspection of parts resistance

Resistance (Ω)	3-4	1-2
Non rod protruded (switch turned OFF)	Infinite	0
Rod protruded (switch turned On)	0	Infinite

Installation

1.	Fix the brake pedal arm and insert fully the stop lamp switch as hiding contact part.

2.	After inserting, turn the stop switch (A) 45° clockwise, and then assemble locking plate by pushing.

Confirm the gap between stop lamp switch and bracket.

Stop lamp clearance (A) : 1.0 - 2.0 mm (0.04 - 0.08 in.)

•	If the gap between stop lamp switch and bracket is not 1.0-2.0mm (0.04-0.08in), perform the above process again.

4.	Connect the stop lamp switch connector (A).

5.	Install the lower crash pad. (Refer to Body - "Crash Pad")

Stop Lamp Switch Troubleshooting

Troubleshooting 1. Part diagnosis Items Cause Symptom Swi ...

Parking Brake System

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