audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Engine Component Power Supply Relay, Checking|Page 2433 > < Engine Component Power Supply Relay, Checking|Page 2431
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Main Relay (Computer/Fuel System): Testing and Inspection
Power Supply Relay, Checking

Power Supply Relay, Checking

Observe all safety precautions: => [ Safety Precautions ] See: Service Precautions/Safety Precautions

View clean working conditions: => [ Clean Working Conditions ] See: Service Precautions/Clean Working Conditions

Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.

For wiring diagrams, component locations, and connector views, Refer to the applicable wiring diagram.

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 (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

-

Remove the Power Supply Relay (terminal 50) ( J682).

Checking voltage

-

Using a multimeter, check the Power Supply Relay (terminal 50) (J682) socket 2/30 to Ground (GND).

Engine Component Power Supply Relay, Checking|Page 2433 > < Engine Component Power Supply Relay, Checking|Page 2431