TT Coupe L4-1.8L Turbo (ATC) (2001)
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.
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Fuel Pump (FP) relay (at position 4 of micro - central electrics in driver's footwell, left) must trigger and Fuel Pump (FP) must run
If relay does not trigger:
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Check 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 oft.
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Connect VAG 1598/31 test box at wiring harness to ECM, do not connect ECM.
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Connect socket 65 and socket 2 of test box to each other using wire from VAG 1594 connector test kit.
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Switch ignition on.
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Fuel Pump (FP) relay (at position 4 of micro-central electrics in driver's footwell, left) must trigger
If relay triggers now, but didn't during output DTM:
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Replace Engine Control Module (ECM).
If relay does not trigger:
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Switch ignition off.
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Remove Fuel Pump (FP) relay.
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Connect multimeter to terminal 19 of relay socket and Ground for voltage measurement.
If specified value is obtained:
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Switch ignition off.
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Check the following wire connection for open circuit and short circuit to Ground and B+ :
Micro-central electronics in
VAG 1598/31 test box socket
drivers-side foot-well, left,
position 4 terminal
16
65
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Repair open circuit or short circuit if necessary.
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If wire connections are OK, replace Fuel Pump (FP) relay - J17 -
Check voltage supply for Fuel Pump (FP) and components