Jetta Sedan L5-2.5L (BGP) (2005)
If indication jumps to approx -40.0 degrees C.
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End diagnosis and switch ignition off.
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Replace Engine Coolant Temperature (ECT) Sensor G62.
CAUTION:
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Cooling system is under pressure.
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Danger of scalding when opening.
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Erase DTC memory for Motronic engine control module J220. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing
and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness
Codes/Readiness Code, Generating
If indication remains at approx 140.0 degrees C.
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End diagnosis and switch ignition off.
Checking the wiring
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Connect test box to Motronic Engine Control Module (ECM) J220 wiring harness. See: 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
93
2
108
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
If no malfunction is detected in wiring:
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Measure resistance at Engine Coolant Temperature (ECT) Sensor G62.