volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Engine Coolant Temperature (ECT) Sensor (On Radiator), Checking|Page 6016 > < Engine Coolant Temperature (ECT) Sensor (On Radiator), Checking|Page 6014
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Check wires between test box and 2-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
Terminal 1 + socket 26
Terminal 2 + socket 12

Wire resistance: max. 3.0 ohms

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Also check wires for short circuit to each other.

Specified value: infinity ohms

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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.  

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Generate readiness code.  

If no malfunctions are detected in the wires and the resistance value is OK:

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Replace Engine Control Module (ECM) -J623-.

Engine Coolant Temperature (ECT) Sensor (On Radiator), Checking|Page 6016 > < Engine Coolant Temperature (ECT) Sensor (On Radiator), Checking|Page 6014