volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Vehicle Speed Sensor|Testing and Inspection|Page 2666 > < Variable Valve Timing Actuator Position Sensor|Testing and Inspection|Page 2662
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Vehicle Speed Sensor: Testing and Inspection

Diagnostic Procedures

Speed Signal, Checking

The following procedure requires a test drive. Observe all safety precautions. Refer to => [ Safety Precautions ] See: Service Precautions/Safety
Precautions.

Special tools, testers and auxiliary items required

‹› multimeter.

‹› Wiring diagram.

Test requirements

‹› The Speedometer (G21) OK.

‹› The Motronic Engine Control Module (ECM) (J623) fuses OK.

‹› Battery voltage at least 12.5 volts.

‹› All electrical consumers such as, lights and rear window defroster, switched off.

‹› A/C switched off.

‹› Ground (GND) connections between engine/transmission/chassis OK.

‹› Ignition switched off.

Test procedure

-

Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check

Start diagnosis

-

Connect the scan tool.

-

Perform a road test with a vehicle speed greater than 5 Km/h.

-

Using the scan tool, Check the vehicle speed:

Vehicle Speed Sensor|Testing and Inspection|Page 2666 > < Variable Valve Timing Actuator Position Sensor|Testing and Inspection|Page 2662