Tiguan 4Motion (5N1) L4-2.0L Turbo (CCTA) (2009)
Engine - Coolant Temperature Sensor/Switch: Testing and Inspection
Diagnostic Procedures
Engine Coolant Temperature Sensor, Checking
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 (G62).
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 (GND) connections between engine/transmission/chassis OK.
‹› Ignition switched off.
‹› Engine MUST be at room temperature.
Test procedure
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Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check
Start diagnosis
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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 Not obtained:
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Continue test according to the following table: