TT Quattro Coupe L4-1.8L Turbo (BEA) (2003)
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Connect multimeter between terminal 3 and 4 of connector for resistance measurement.
All models
Range A shows the resistance values for the temperature range from 0 to 50 degree C, and range B shows the values for the temperature range from
50-100 degree C.
Read-out examples:
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30 degree C corresponds to a resistance of 1500 to 2000 ohms
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80 degree C corresponds to a resistance of 275 to 375 ohms
If specified value is not obtained:
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Replace coolant temperature sensor.
If specified value is obtained:
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Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM. See: Powertrain Management/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
Coolant temperature sensor with square connector:
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Check the following wire connections for open circuit and short circuit to Ground (GND) and B+:
