TT Quattro Coupe L4-1.8L Turbo (BEA) (2003)
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Check wire connections.
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Check Motronic Engine Control Module (ECM) power supply relay -J271-. See: Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Motronic Engine Control Module (ECM) Power Supply Relay -J271
If specified value is obtained:
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Check activation of power output stage.
Checking activation of power output stages
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Pull connector off all four fuel injectors.
NOTE: Fuel must not be injected during the test to avoid damaging catalytic converter. Connectors must therefore be disconnected from fuel injectors.
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Remove the 4-pin connector at ignition coil.
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Connect VAG1527B voltage tester to connector terminals 2 and 3.
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Operate starter briefly.
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LED must blink (brief blink signal).
If specified values are not obtained:
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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/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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Check the following wire connections for open circuit and short circuit to Ground (GND) and B+:
Harness connector
VAG1598/31 test box
Terminal
Socket
3 (Cyl. 1)
102
3 (Cyl. 2)
95
3 (Cyl. 3)
103
3 (Cyl. 4)
94
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Repair open circuit or short circuit if necessary.
If no malfunctions are found in wires: