TT Quattro Coupe L4-1.8L Turbo (BEA) (2003)
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Connect multimeter for voltage measurement as follows:
Harness connector
Specified value
Terminal
2 + Ground (GND)
about 5 V
2 + 6
about 5 V
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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Pull connector (2) off throttle valve control module.
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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
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.