S6 V8-4.2L (BBD) (2004)
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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.