TT Quattro Coupe L4-1.8L Turbo (AWP) (2001)
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The fuel pump relay should pick up and the fuel pump should run. (Relay is located in relay position 4 in micro central electrics on left of
driver's footwell).
A -
If the relay does not pick up:
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Test voltage supply to fuel pump relay.
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Test activation of fuel pump relay.
B -
If the relay picks up but the fuel pump does not run:
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Test voltage supply to fuel pump and other components (via fuel pump relay).
Testing voltage supply to fuel pump relay
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Disconnect fuel pump relay.
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Connect multimeter (voltage measurement range) to Ground and contact 17 on relay panel.
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Specification: approx. battery voltage
If the specification is not obtained:
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Replace central electrics unit
Testing activation of fuel pump relay
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Switch off ignition.
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Connect test box VAG 1598/31 to wiring harness for engine control module. Do not connect to the engine control module itself. See: Computers
and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Manufacturer's Scan Tool/Scan Tool
Connecting and Initial Checks/Wiring and Component Testing Using VAG1598/31 Test Box
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Bridge contacts 1 and 65 on the test box using test leads from adapter set VAG 1594 A.
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Switch on ignition.