audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

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Main Relay (Computer/Fuel System): Testing and Inspection
With Generic Scan Tool

Check Motronic Engine Control Module (ECM) Power Supply Relay -J271- And Activation

Special Tools and Equipment

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V.A.G1526A hand multimeter

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V.A.G1594A connector test kit

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V.A.G1598/31 test box

NOTE:  The Motronic Engine Control Module (ECM) voltage supply relay -J271- supplies voltage to the ignition coils with power output stages
and the Engine Control Module (ECM) at pin 121.

Test requirement:

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Ignition switched off.

Test sequence

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