TT Coupe L4-1.8L Turbo (ATC) (2001)
If specified values are obtained:
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Also check signal wires and activation wires of throttle valve actuator.
If specified values are not obtained:
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Check wire connections from Engine Control Module (ECM) to throttle valve control module.
Checking wire connections
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Disconnect connector from throttle valve control module.
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Connect VAG 1598/31 test box at wiring harness to ECM, do not connect ECM.
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Check the following wire connections for open circuit and short circuit to Ground and B+:
Harness connector terminal
VAG 1598/31 test box socket
1
92
2
83
3
117
4
84
5
118
6
91
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Repair open circuit or short circuit if necessary.
If no malfunctions are found in wires:
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Replace throttle valve control module.