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2008 - MX-5 - Transmission/Transaxle

VEHICLE SPEED SENSOR (VSS) INSPECTION [M15M-D]

Visual Inspection

1. Remove the VSS. (See VEHICLE SPEED SENSOR (VSS) REMOVAL/INSTALLATION[M15M-D].)
2. Verify that the sensor is free of any metallic shavings or particles.
3. Install the VSS. (See VEHICLE SPEED SENSOR (VSS) REMOVAL/INSTALLATION[M15M-D].)

Wave Profile Inspection

1. Remove the PCM. (See PCM REMOVAL/INSTALLATION[LF].)
2. Connect M-MDS to DLC-2.
3. Connect oscilloscope test leads to the following PCM connector terminals.
4. Start the engine.
5. Monitor VSS PID.
6. Inspect wave profile.

Power Supply Voltage Inspection

1. Disconnect the VSS connector.
2. Turn the ignition switch to the ON position.
3. Measure voltage at VSS terminal B.

Open Circuit Inspection

1. Inspect the following circuit for open.

Short Circuit Inspection

1. Inspect the following circuit for short circuit.

Sensor Rotor Inspection

1. Remove the VSS. (See VEHICLE SPEED SENSOR (VSS) REMOVAL/INSTALLATION[M15M-D].)
2. Shift the shift lever to neutral position.
3. Inspect sensor rotor surface via VSS installation hole while rotating a rear tire manually.
a. Is the sensor rotor free of damage and cracks?
b. Is the sensor rotor free of any metallic shavings or particles?
  • If the sensor rotor is normal, replace the VSS.

  • If there is any malfunction, clean or replace the sensor rotor.



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