Kia Rio YB Quiz
Brake System

Stop Lamp Switch

In this manual: Brake System
General Information — 8Maintenance — 31Engine Mechanical System — 44Engine Electrical System — 14Emission Control System — 9Engine Control System/Fuel System — 30Clutch System — 10Manual Transmission — 10Automatic Transmission — 23Drive Shaft and Axle — 8Suspension System — 15Steering — 9Restraints — 14Brake System — 22Body (Interior and Exterior) — 115Body Electrical System — 84Heating, Ventilation, and Air Conditioning — 28
16steps
~96min
4/5difficulty
Done 0 of 16

Components and Component Location

Components

1. Brake Pedal Assembly
2. Stop Lamp Switch		 3. Brake Pedal Lever

Circuit Diagrams

Schematic Diagram

System Diagram

Terminal Function

Terminal Description
1 IGN1
2 Engine Control Module (ECM)
3 B+
4 Stop Lamp

Troubleshooting

Troubleshooting

  1. Component Inspection

    Items Cause Symptom
    Fuse Switch Loose fuse connection, blown fuse

    • DTC: P0504

    • Symptom: Shift problems, start failure, cruise control cancel function problem, EPB cancel function malfunction, brake light malfunction, ESP OFF lamp ON.

    		 ① Check the signal waveform using an oscilloscope on each part while the vehicle is accelerating/braking. (Refer to Brake Light Switch Circuit Inspection Procedure)

    ② Refer to the applicable part repair procedure if any abnormality is found in the waveform (refer to the repair procedure for the relevant part and replace if necessary)
    Fuse Relay Loose fuse connection, blown fuse

    • DTC: P0504

    • Symptom: Shift problems, start failure, cruise control cancel function problem, EPB cancel function malfunction, brake light malfunction, ESP OFF lamp ON.
    Stop Lamp Switch

    • Damaged wiring of each component

    • Incorrect connector connection

    • Faulty component

    • DTC: P0504

    • Symptom: Shift problems, start failure, cruise control cancel function problem, EPB cancel function malfunction, brake light malfunction, ESP OFF lamp ON.
    Stop Lamp Electronic
    Module (if applicable)

    • DTC: P0504, C2130, C2131

    • Symptom: Shift problems, start failure, cruise control cancel function problem, EPB cancel function malfunction, brake light malfunction, ESP OFF lamp ON.
    Engine Control Module (ECM)

    • DTC: P0504

    • Symptom: Shift problems, cruise control cancel problem
    Body Control Module (BCM)

    • Gear Shifting Concerns
    Shift Lock Solenoid

    • Gear Shifting Concerns
    Inhibitor Switch

    • Symptom: Shift problems, no-start, cruise control cancel problem, EPB release function problem
    Smart Key Unit (SMK)

    • Starting Failure
    Electronic Parking Brake (EPB)

    • Symptom: EPB release function problem, ESP OFF indicator illuminated.
    ABS/VDC Control Unit (Pressure Sensor)

    • Symptom: ESP OFF lamp illuminated.

  2. Symptom Diagnostics

    Symptom Possible Cause
    Starting Problems Switch fuse, relay fuse, brake light switch, electronic brake light module, ABS/VDC control module, each wire, connector ① Check the signal waveform using an oscilloscope on each part while the vehicle is accelerating/braking. (Refer to Brake Light Switch Circuit Inspection Procedure)

    ② Refer to the applicable part repair procedure if any abnormality is found in the waveform (refer to the repair procedure for the relevant part and replace if necessary)
    Gear Shifting Concerns Switch fuse, relay fuse, brake light switch, electronic brake light module, BCM, ECM, inhibitor switch, each wire, connector
    ESP OFF indicator light is on Switch fuse, relay fuse, brake light switch, electronic brake light module, ABS/VDC control module, each wire, connector
    P0504 Switch fuse, relay fuse, brake light switch, electronic brake light module, ECM, each wire, connector
    Stop lamp does not operate Switch fuse, relay fuse, brake light switch, electronic brake light module, wire/connector disconnected
    Stop lamp always
    on    		 Stop lamp switch, stop lamp electronic module,
    Wiring short circuit, blown fuse

  3. Stop Lamp Switch System Diagnosis

    SSEM: Stop Lamp Electronic Module

  4. Refer to the DTC Chart when the applicable DTCs are displayed.

Repair Procedures

Adjustment

  1. Check the clearance between the stop lamp switch and the bracket.

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

  2. If the clearance between the stop lamp switch and the bracket is not 1.0 - 2.0 mm (0.04 - 0.08 in.), check the mounting clip and other parts around the stop lamp switch.

  3. If everything is normal, reinstall the stop lamp switch and check the clearance again.

Inspection

  1. Inspect the stop lamp switch.

    1. Connect a circuit tester to the brake light switch connector and check for continuity when the brake light switch plunger is pressed and when it is released.

    2. The brake light switch is normal if there is no continuity when the plunger is pressed.

Replacement

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

  2. Remove the airbag lower panel.

    (Refer to Body - "Under Cover Panel")

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

  4. Pull the lock plate (A) as shown by the arrow.

  5. Turn the brake switch 45° counterclockwise and remove it.

  6. Hold the brake pedal arm and fully insert the brake switch so that the contact part is not visible.

  7. After insertion, turn the brake switch 45° clockwise, then install the locking plate by pressing.

  8. Connect the connector of the brake light switch (A).

  9. Install the emergency pad lower panel.

    (Refer to Body - "Under Cover Panel")

Test yourself

A quick Kia Rio YB quiz: every answer comes with an explanation and a link to the manual page.