audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Fuel Pump Control Unit|Testing and Inspection|Page 5879 > < Fuel Pump Control Unit|Testing and Inspection|Page 5877
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Disconnect connector -3- for Fuel Pump (FP) Control Module -J538- -2-.

NOTE:  Connectors -1- and -4- remain connected.

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Connect the multimeter for voltage measurement as specified below.

Connector terminal

Desired value

5

Battery pos. (+)

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Briefly operate starter
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Desired value: Briefly (approx. 1 second) approx. battery voltage, then it drops to 10 V

Desired value not reached:

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Connect test box VAG1598/31 to the circuit harness connector; do not connect the ECM. Connect the ground clip of the test box to ground (not
shown in illustration).

WARNING:  To avoid damaging electrical components, select the appropriate measurement settings on the measuring device before connecting to the
components.

Fuel Pump Control Unit|Testing and Inspection|Page 5879 > < Fuel Pump Control Unit|Testing and Inspection|Page 5877