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Passat Sedan V6-3.6L (BLV) (2008)

Powertrain Management > Fuel Delivery and Air Induction > Main Relay (Computer/Fuel System) > Component Information > Locations > Page 3600

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Main Relay (Computer/Fuel System): Testing and Inspection

Diagnostic Procedures

Motronic Engine Control Module Power Supply Relay, Checking

Special tools, testers and auxiliary items required

‹› Multimeter.

‹› Wiring diagram.

Test requirements

‹›  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.

Test procedure

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Observe safety precautions. Refer to => [ Safety Precautions ] See: Computers and Control Systems/Service Precautions/Safety Precautions

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Observe Clean Working Conditions. Refer to => [ Clean Working Conditions ] See: Computers and Control Systems/Service Precautions/Clean
Working Conditions

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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.

Test sequence

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Remove the Motronic Engine Control Module (ECM) Power Supply Relay (J271).

Checking voltage

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Turn the ignition switch on.

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Using a multimeter, check the Motronic Engine Control Module (ECM) Power Supply Relay (J271) socket 30 to ground.

Powertrain Management > Fuel Delivery and Air Induction > Main Relay (Computer/Fuel System) > Component Information > Locations > Page 3600

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