audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 5945 > < With Manufacturer's Scan Tool|Page 5943
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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

-

VAG1526A multimeter

-

VAG1594A connector test kit

-

VAG1598/31 test box

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

Test requirement:

-

Ignition switched off.

Test sequence

With Manufacturer's Scan Tool|Page 5945 > < With Manufacturer's Scan Tool|Page 5943