TT Coupe L4-1.8L Turbo (AWP) (2005)
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Operate starter and test ignition signal from Engine Control Module (ECM).
LED must flicker
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Switch off ignition.
If LED flickers and the voltage supply is OK:
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Replace ignition coils with power output stage
If LED does not flicker:
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Check wires.
Checking Wiring
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Connect test box to ECM wiring harness. See: Computers and Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Test Box, Connecting For Wiring Test
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Check wires between test box and 4-pin connector for open circuit according to wiring diagram.
Cylinder 1 Terminal 3 + Socket 102
Cylinder 2 Terminal 3 + Socket 95
Cylinder 3 Terminal 3 + Socket 103
Cylinder 4 Terminal 3 + Socket 94
Wiring resistance: max. 1.5 Ohms
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Check wires for short circuit to each other.
If there is no malfunction in wiring connections:
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Replace Engine Control Module (ECM).
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Erase DTC memory of ECM. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode
04 - Erase DTC Memory
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness
Codes/Generate Readiness Code