Jetta Sedan L5-2.5L (BGP) (2005)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Engine Coolant Temperature (ECT) Sensor (on Radiator) G83, Checking
Engine Coolant Temperature (ECT) Sensor (On Radiator) G83, Checking
NOTE: Use only gold-plated terminals when servicing terminals in harness connector of Engine Coolant Temperature (ECT) Sensor G83.
Special tools, testers and auxiliary items required
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Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
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Connector test set V.A.G 1594
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Wiring diagram
Test conditions
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The respective fuses of Motronic Engine Control Module (ECM) J220 must be OK.
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The parking brake must be applied, otherwise daytime running lights are switched on.
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On vehicles with automatic transmission, selector lever must be in position "P" or "N".
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Engine must be cold.
CAUTION:
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Cooling system is under pressure.
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Danger of scalding when opening.
Test sequence
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Disconnect 2-pin connector from Engine Coolant Temperature (ECT) Sensor (on Radiator) G83
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Connect test box to Motronic Engine Control Module (ECM) J220 wiring harness. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring Test
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Check wires between test box and 2-pin connector for open circuit according to wiring diagram.
Contact
Test box socket
1
17
2
50
Wiring resistance: max. 1.5 Ohms
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Check wires for short circuit to each other, to B+ and Ground (GND).
Specification:Infinite Ohms