Kia Forte BD Quiz
Manual Transmission

Vehicle speed sensor

In this manual: Manual Transmission
General Information — 8Maintenance — 32Engine Mechanical System — 47Engine Electrical System — 17Emission Control System — 10Engine Control System/Fuel System — 32Clutch System — 11Manual Transmission — 11DCT (Dual Clutch Transmission) System — 16Drive Shaft and Axle — 8Suspension System — 26Steering — 9Restraints — 11Brake System — 27Body (Interior and Exterior) — 119Body Electrical System — 98Heating, Ventilation, and Air Conditioning — 27
18steps
~108min
4/5difficulty
010203040507.86N·mlb·ft
Tightening torque found on this page
Done 0 of 18

Specifications

Specification

Item Specification
Type Hall Sensor
Operating Voltage 6.5–15V
Output Voltage VN ≤ 0.5V
(At output current of 15 mA)

Description and Operation

Description

Component Location: Manual Transaxle Case

Operating Principle: The Vehicle Speed Sensor (VSS) is a Hall sensor and detects the rotational speed of the differential.

Function

  • By comparing the engine speed with the vehicle speed calculated from the VSS signal, the ECM determines the gear engaged.

  • Based on the engaged gear information, the ECM performs optimal injection quantity correction.

  • The VSS signal is also used by the cluster speedometer, A/C control module, BCM, etc.

Repair Procedures

Inspection

Visual Inspection of Harness

  1. Check the vehicle speed sensor using the KDS.

    (If normal, the current vehicle speed is displayed)

  2. Check whether the current vehicle speed matches the vehicle speed displayed on the KDS.

  3. Check the connectors and wiring for damage.

  4. Check the power supply.

    1. Turn the ignition off.

    2. Disconnect the vehicle speed sensor.

    3. Turn the ignition on.

    4. Check the power terminal voltage.

      Specification: 11.5 V - 13.0 V

  5. Check the signal.

    1. Turn the ignition off.

    2. Disconnect the vehicle speed sensor.

    3. Turn the ignition on.

    4. Check the voltage at the signal terminal.

      Specification: 8.0 V - 11.5 V

  6. Check the ground.

    1. Turn the ignition off.

    2. Disconnect the vehicle speed sensor.

    3. Turn the ignition on.

    4. Check the voltage between the signal terminal and body ground.

    5. Check the voltage between the signal terminal and the ground terminal.

      Specification: (4) - (5) = within 200 mV

Component Inspection

  1. IG KEY "OFF", ENGINE "OFF".

  2. Disconnect the vehicle speed sensor connector.

  3. Disconnect the vehicle speed sensor and driven gear.

  4. Check the spline (A) for wear.

  5. Check the rotating condition of the vehicle speed sensor driven gear.

  6. Connect the vehicle speed sensor connector and turn the IG KEY to "ON".

  7. Turn the driven gear by hand.

    Specification: vehicle speed signal is generated.

Removal

  1. Remove the air cleaner assembly and air duct.

    (Refer to Engine Mechanical System - "Air Cleaner")

  2. Remove the battery and battery tray.

    (Refer to Engine Electrical System - Battery)

  3. Disconnect the vehicle speed sensor connector (A).

  4. Remove the vehicle speed sensor (A) and driven gear.

    Tightening torque: 5.9–7.8 N·m

  5. Separate the vehicle speed sensor (A) and driven gear (B).

Installation

  1. Install in the reverse order of removal.

Test yourself

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