A vehicle speed sensor informs the ECM whether the vehicle is moving or not as well as whether the vehicle speed is high or not.
The ECM controls injection, ignition, shifting and torque converter clutch timing with this sensor signal.
Item | Detecting Condition & Fail Safe | Possible Cause |
DTC Strategy | ● - | ● Vehicle speed sensor circuit. ● Vehicle speed sensor. |
Enable Conditions | ● Vehicle speed from the sensor ＞= 30㎞/h | |
Threshold Value | ● No Signal | |
Diagnostic Time | ● More than 30 seconds | |
Fail safe | ● - |
Many malfunctions in the electrical system may be caused from poor harness and terminals. These faults can be caused by interference from other electrical systems and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
▶ Go to the next procedure.
Power supply circuit inspection
Vehicle speed sensor connector: Disconnect.
IG KEY ON, ENG OFF.
Measure the voltage of the termianl 1.
Specification : Approx. B+
Is voltage within specifications?
▶ Go to "Ground circuit inspection" procedure.
▶ Check for Open in harness. Repair as necessary and Go to "Verification of Vehicle Repair" procedure.
▶ Check for the relevant fuses.
Ground circuit inspection
IG KEY OFF
Vehicle speed sensor connector: Disconnect.
Measure resistance between terminal ground of vehicle speed sensor harness connector and terminal ground of PCM(or TCM) connector.
Specification : Approx. 0Ω
Is resistance within specifications?
▶ Check for the signal circuit.
▶ Check for Open or short in harness. Repair as necessary.
