TT L4-1.8L Turbo (BEA) (2004)
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Connect multimeter between terminal 2 and 3 for resistance measurement.
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Specification: 730 to 1000 Ohm
NOTE: Resistance value of the engine speed (RPM) sensor is based on a temperature of 20 degree C. Resistance increases as temperature increases.
If specified value is not obtained:
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Replace engine speed (RPM) sensor.
If specified value is obtained:
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Connect multimeter to terminals 2 and 1 (shielding) and to terminals 3 and 1 (shielding) for resistance measurement.
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Specification: each infinity Ohm (no continuity)
If specified value is not obtained:
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Replace engine speed (RPM) 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/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Manufacturer's Scan Tool/Electrical
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 (shielding)
108
2 (Ground -GND-)
90
3 (signal)
82
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Repair open circuit or short circuit if necessary.
If no malfunctions are found in wires:
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Replace Engine Control Module (ECM).