TT L4-1.8L Turbo (BEA) (2004)
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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.
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Exit function "03 - Output check diagnosis" by pressing <- button.
A If relay does not trigger:
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Check voltage supply for Fuel Pump (FP).
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Check activation of Fuel Pump (FP) relay.
B If relay triggers, but Fuel Pump (FP) does not run:
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Check voltage supply for Fuel Pump (FP) and components (via Fuel Pump -FP- relay).
Checking voltage supply for Fuel Pump (FP)
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Remove fuel pump relay.
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Connect multimeter to terminal 17 of relay socket and Ground (GND) for voltage measurement.
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Specification: approx. battery voltage
If specified value is not obtained:
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Replace the micro-central electronics.
Checking activation of Fuel Pump (FP) relay
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Turn off ignition.
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Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Manufacturer's Scan Tool/Electrical Testing Using
VAG1598/31 Test Box
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Connect socket 65 and socket 1 of test box to each other using adapter cable from VAG1594A connector test kit.
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Switch ignition on.