Hyundai Genesis DH Quiz
Brake System

Stop Lamp Switch Repair Procedures

In this manual: Brake System
General Information — 9Engine Mechanical System — 103Engine Electrical System — 54Emission Control System — 23Engine Control System/Fuel System — 127Automatic Transmission System (SBC) — 90All-Wheel Drive (AWD) System — 20Drive Shaft and Axle — 27Suspension System — 41Steering — 19Restraints — 56Brake System — 56Body (Interior and Exterior) — 211Body Electrical System — 279Heating, Ventilation, and Air Conditioning — 55
19steps
~114min
4/5difficulty
Done 0 of 19

Adjustment

  1. Turn the ignition switch OFF and disconnect the negative (-) battery cable.
  2. Remove the lower under cover. (Refer to Body - Under Cover)
  3. Remove the knee airbag. (Refer to Restraint System - Knee Airbag Module)
  4. Check the clearance between the stop lamp switch and the bracket.

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

  5. If the clearance between the stop lamp switch and the bracket is less than 1.0 ~ 2.0 mm (0.04 ~ 0.08 in.), check the mounting clip and other components around the stop lamp switch.
  6. If there is no problem, remove the stop lamp switch and then reinstall it.

Inspection

1. Check Fuses. Install a test fuse on the switch fuse and relay fuse part to check for normal connection.
2. GDS Data Analysis
  1. Analyze the GDS data and check whether the stop lamp switch is operating normally.
    1. Connect the GDS to the self-diagnosis connector.
    2. Turn the ignition switch ON.
    3. Press the brake pedal.
    4. Check the 'Brake Switch' item in the GDS 'Sensor Data'. Normal waveform: The signal value will change according to the brake switch ON/OFF state.
3. Check Connectors by Part. Check each connector for damage, terminal overheating, or incomplete connection. [Engine Room Junction Box]
[Stop Lamp Electronic Module]
[ABS/VDC Control Module]
4. Inspect the stop lamp circuit. Connect the probe to each terminal wire and check the signal waveform. [Stop Lamp Switch Input/Output]
[Stop Lamp Electronic Module Input/Output]
[Oscilloscope Waveform Screen]

Removal

  1. Turn the ignition switch OFF and disconnect the negative (-) battery cable.
  2. Remove the lower under cover. (Refer to Body - Under Cover)
  3. Remove the knee airbag. (Refer to Restraint System - Knee Airbag Module)
  4. Disconnect the stop lamp switch connector (A).
  5. Pull the lock plate (A) as shown by the arrow.
  6. Turn the stop lamp switch 45° counterclockwise and remove it.
  7. Inspect the removed stop lamp switch according to the procedures described below.
    1. Confirm normal connection with the terminal part.
      A. Check whether the connector is securely connected and whether the connection mark is present.
    2. Perform resistance inspection of the part.
      Resistance (Ω) 3-4 1-2
      Plunger not protruding
      (switch OFF)      		 Infinity 0
      Plunger protruding
      (switch ON)      		 0 Infinity

Installation

  1. Secure the brake pedal arm and insert the stop lamp switch with the hidden contact portion.
  2. After inserting, rotate the lock switch (A) 45° clockwise, then assemble the lock plate (B) by pressing it.
  3. Check the clearance between the stop lamp switch and the bracket.

    Stop lamp switch clearance: 1.0-2.0 mm (0.04-0.08 in.)
    If the clearance between the stop lamp switch and the bracket is less than 1.0 ~ 2.0 mm (0.04 ~ 0.08 in.), repeat the above procedure.
  4. Connect the stop lamp switch connector.
  5. Install the knee airbag. (Refer to Restraint System - Knee Airbag Module (KAB))
  6. Install the lower under cover. (Refer to Body - Under Cover)

Test yourself

A quick Hyundai Genesis DH quiz: every answer comes with an explanation and a link to the manual page.