Volkswagen Workshop Manuals
Passat Sedan V6-3.6L (BLV) (2008)
Powertrain Management > Computers and Control Systems > Relays and Modules - Computers and Control Systems > Main Relay (Computer/Fuel System) > Component Information > Locations > Page 3208
Main Relay (Computer/Fuel System): Testing and Inspection
Motronic Engine Control Module Power Supply Relay, 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, selector lever in 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: Service Precautions/Safety Precautions
Observe Clean Working Conditions. Refer to => [ Clean Working Conditions ] See: Service Precautions/Clean Working Conditions
Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Testing and Inspection/Scan Tool Testing
Remove the Motronic Engine Control Module (ECM) Power Supply Relay (J271).
Turn the ignition switch on.
Using a multimeter, check the Motronic Engine Control Module (ECM) Power Supply Relay (J271) socket 30 to ground.
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