Vehicle Speed Sensor: Testing and Inspection
VEHICLE SPEED SENSOR CHECK
1. Remove the vehicle speed sensor and connect a 3 - 10 kohms resistor as shown in the illustration.
2. Turn the shaft of the vehicle speed sensor and check that there is voltage between terminals 2 - 3. (1 turn = 4 pulses)
3. If within the standard value, the vehicle speed sensor is OK. If not within the standard value, replace the vehicle speed sensor.
Standard value: Voltage alternates between 0 volt and 5 volts four times per turn.
OUTPUT SHAFT SPEED SENSOR CHECK
The output shaft speed sensor cannot be checked as an individual part after the sensor has been removed. Using scan tool MB991502, check whether diagnosis code 23 is set while the sensor is installed. If this code is set, refer to "Combination meter diagnosis Symptom Procedure 1". Inspection Procedure 1