TT Quattro Coupe L4-1.8L Turbo (BEA) (2003)
Test requirement:
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Battery voltage at least 11 V
Function test of Fuel Pump (FP) relay
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Remove driver-side storage compartment.
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Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01. See: Powertrain
Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/Scan Tool Connecting
and Initial Checks/Connecting VAS 5051/VAG1551 Scan Tool
Ignition must remain switched on for this.
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Initiate output Diagnostic Test Mode and activate Evaporative Emission (EVAP) canister purge regulator valve -N80- (Tank Ventilation Valve).
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With
Manufacturer's Scan Tool
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Fuel Pump (FP) relay (at position 4 of micro-central electronics in driver's footwell, left) must trigger and Fuel Pump (FP) must run.
If relay does not trigger:
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Checking activation of Fuel Pump (FP) relay
If Fuel Pump (FP) does not run:
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Check voltage supply for Fuel Pump (FP) and components (via Fuel Pump -FP- relay).
Check activation of Fuel Pump (FP) relay.
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Switch ignition off.
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Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/Scan Tool Connecting and Initial Checks/Wiring and
Component Testing Using VAG1598/31 Test Box
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Connect socket 65 and socket 2 of test box to each other using adapter cable from VAG1594 connector test kit.
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Switch ignition on.