A4 Sedan L4-1.8L Turbo (AEB) (1997)
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Connect VAG 1598/22 test box to ECM harness connector. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting
VAG 1598/22 Test Box" See: Powertrain Management/Computers and Control Systems/Testing and Inspection (Numbers marked on ECM
connector match those on test box).
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Connect multimeter US 1119 (Fluke 83 or equivalent) to check for open circuit between relay socket terminal 29 and test box socket 4.
Specified value: max. 1 Ohms
If resistance is NOT OK:
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Repair wiring using applicable wiring diagram.
If the wiring is OK, but the LED test light does not light up:
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Replace Engine Control Module (ECM).
If the wiring is OK, and the signal to the fuel pump relay is OK:
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Replace fuel pump relay -J17-.
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Reinstall fuses.