5 L4-2.3L (2007)
Vehicle Speed Sensor: Component Tests and General Diagnostics
VEHICLE SPEED SENSOR (VSS) INSPECTION (FN4A-EL)
1. Connect the M-MDS, drive the vehicle, and verify the input value of the OSS PID.
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If the input value is 0 rpm, perform the "Power Supply Voltage Inspection", "Open Circuit Inspection", or "Short Circuit Inspection".
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If the input value is other than 0 rpm, perform the "Visual Inspection" or "Wave Profile Inspection".
Visual Inspection
1. Remove the VSS.
2. Verify that the sensor is free of any metallic shavings or particles.
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If there is any malfunction, clean them off.
3. Install the VSS.
Wave Profile Inspection
1. Remove the PCM.
2. Connect M-MDS to DLC-2.
3. Connect oscilloscope test leads to the following PCM connector terminals.
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(+) lead: PCM terminal 1J
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(-) lead: PCM terminal 1BD
4. Start the engine.
5. Monitor VSS PID.
6. Inspect wave profile.
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PCM terminal: 1J (+)- 1BD (-)
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Oscilloscope setting: 1 V/DIV (Y), 2.5 ms/DIV (X), DC range
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Vehicle condition: drive the vehicle at 32 km/h (20 mph)
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If there is any malfunction, perform the "Open Circuit Inspection" or "Short Circuit Inspection".
Power Supply Voltage Inspection
1. Disconnect the VSS connector.
2. Turn the ignition switch to the ON position.
