A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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