Kia Forte: Manual Transaxle System / Vehicle Speed Sensor
Specifications
Item
|
Specification
|
Type
|
Hall sensor
|
Working voltage
|
6.5
-1 5V
|
Output voltage
|
VL ≤ 0.5 V
|
(When output current is 15mA flows)
|
Description and operation
Component location : Manual transaxle case
Operation principle : Vehicle Speed Sensor (VSS) is hall sensor type and senses
the rotating speed of differential gear.
Function
| • |
Comparing engine speed with vehicle speed calculated based on vehicle
speed sensor signal, ECM recognizes engaged gear.
|
| • |
Based on the information about engaged gear, ECM performs optimum fuel
injection quantity correction.
|
| • |
VSS signal is also used in speed meter of cluster, A/C control module,
BCM, etc.
|
Repair procedures
W/Harness Inspection
| 1. |
Check the vehicle speed sensor by using the KDS.
(if normal, current vehicle speed is display)
|
| 2. |
Check if current vehicle speed is same as vehicle speed displayed on
the KDS.
|
| 3. |
Check the damage to the connectors and wiring.
|
| 4. |
Check the power.
| (1) |
Turn ignition switch OFF.
|
| (2) |
Disconnect the vehicle speed sensor.
|
| (3) |
Turn ignition switch ON.
|
| (4) |
Check the voltage of the power terminal.
|
Specification : 11.5V - 13.0V
|
|
|
| 5. |
Check the signal.
| (1) |
Turn ignition switch OFF.
|
| (2) |
Disconnect the vehicle speed sensor.
|
| (3) |
Turn ignition switch ON.
|
| (4) |
Check the voltage of the signal terminal.
|
Specification : 8.0V - 11.5V
|
|
|
| 6. |
Check the ground.
| (1) |
Turn ignition switch OFF.
|
| (2) |
Disconnect the vehicle speed sensor.
|
| (3) |
Turn ignition switch ON.
|
| (4) |
Check the voltage between signal terminal and body ground.
|
| (5) |
Check the voltage between signal terminal and ground terminal.
|
Specification : (4) - (5) = Within 200mV
|
|
|
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 wear of spline (A).
|
| 5. |
Check rotating state of vehicle speed sensor driven gear.
|
| 6. |
Connect the vehicle speed sensor connector and IG KEY "ON".
|
| 7. |
Rotate the driven gear with hand.
|
Specification : Vehicle Speed Signal generates.
|
|
| 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 (0.6 - 0.8 kgf·m, 4.3 - 5.8 lb·ft)
|
|
After removing speed sensor, be careful not to enter dust, foreign
matters, etc in speed sensor hole.
|
|
| 5. |
Separate the vehicle speed sensor (A) and driven gear (B).
|
| 1. |
Install in the reverse order of removal.
|
Do not reuse the O-ring (A).
|
|
Specifications
Specifications
Item
Specified
Type
ON / OFF
Operating condition
Neutral gear
...
Other information:
Some of the following vehicles ahead
in your lane may not be recognized
by the sensor:
- Narrow vehicles such as motorcycles
or bicycles
- Vehicles offset to one side
- Slow-moving vehicles or suddenly
decelerating vehicles
- Stopped vehicles
- Vehicles with small rear profiles
...
■ Type A
■ Type B
This warning message is displayed
when the vehicle is driven slowly on
a grade and the vehicle detects that
the brake pedal is not applied.
Steep grade
Driving up hills or on steep grades:
To hold the vehicle on an incline,
use the foot brake or the parki ...
Neutral Switch