Jetta SportWagen L4-2.0L DSL Turbo (CBEA) (2009)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Engine Coolant Temperature Sensor 2, Checking
Diagnostic Procedures
Engine Coolant Temperature Sensor 2, Checking
Observe all safety precautions: --> [ Safety Precautions ]
View clean working conditions: --> [ Clean Working Conditions ]
Prior to repair work, perform a preliminary check to verify the condition. Refer to --> [ Preliminary Check ] See: Powertrain Management/Computers
and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check.
CAUTION!
‹› Cooling system is under pressure.
‹› Danger of scalding when opening!
‹› Use only gold-plated terminals when servicing terminals in the electrical harness connector of Engine Coolant Temperature (ECT) Sensor 2 (G83).
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› jumper wire.
‹› Wiring diagram.
Test requirements
‹› The Motronic Engine Control Module (ECM) (J623) fuses OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› Vehicles with automatic transmission, shift selector lever into position " P" or "N".
‹› A/C switched off.
‹› Ground connections between engine/transmission/chassis OK.
‹› Ignition switched off.
‹› Engine cold.
Start diagnosis
Engine must be at room temperature.
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Connect the scan tool.
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Switch the ignition on.
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Using the scan tool, check the coolant temperature:
If the specified value was obtained:
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Start the engine and let it run at idle.