Passat Sedan V6-3.6L (BLV) (2008)
Engine Speed Sensor: Testing and Inspection
Engine Speed Sensor G28, Checking
Special tools, testers and auxiliary items required
‹› Wiring diagram.
‹› 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.
‹› Vehicles with automatic transmission, shift selector lever into position " P" or "N".
‹› A/C switched off.
‹› Ground connections between engine/transmission/chassis OK.
‹› Ignition switched off.
Observe safety precautions. Refer to => [ Safety Precautions ] See: Computers and Control Systems/Service Precautions/Safety Precautions
Observe Clean Working Conditions. Refer to => [ Clean Working Conditions ] See: Computers and Control Systems/Service Precautions/Clean
Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Computers and Control Systems/Testing
and Inspection/Scan Tool Testing and Procedures/Preliminary Check.
The Engine Speed (RPM) Sensor (G28) detects RPM and reference marks. Without an engine speed signal, the engine will not start. If the engine
speed signal fails while the engine is running, the engine will stall immediately.
Connect the scan tool.
Switch the ignition on.
Using the scan tool, check the engine speed:
Switch ignition off.
If the specified value was not obtained:
Checking internal resistance
Disconnect the Engine Speed (RPM) Sensor (G28) electrical harness connector.