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Engine Coolant Temperature (ECT) Sensor -G62-, Checking|Page 2194 > < Engine Coolant Temperature (ECT) Sensor -G62-, Checking|Page 2192
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Engine - Coolant Temperature Sensor/Switch: Testing and Inspection
Engine Coolant Temperature Sensor (on Radiator) -G83-, Checking

Engine Coolant Temperature Sensor on Radiator, Checking

CAUTION!

Cooling system is under pressure.
Danger of scalding when opening!

Note:  Use only gold-plated terminals when servicing terminals in the electrical harness connector of Engine Coolant Temperature (ECT) Sensor (on
Radiator) -G83-.

Special tools, testers and auxiliary items required

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Multimeter.

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Wiring diagram.

Test requirements

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 The Motronic Engine Control Module (ECM) -J220- fuses OK.

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Battery voltage at least 12.5 volts

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All electrical consumers such as, lights and rear window defroster, switched off.

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Vehicles with automatic transmission, shift selector lever into position "P" or "N".

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A/C switched off.

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Ground (GND) connections between engine/transmission/chassis OK.

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Ignition switched off.

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Engine cold.

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

Checking internal resistance

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Disconnect the Engine Coolant Temperature (ECT) Sensor (on Radiator) -G83- electrical harness connector -1-.

Engine Coolant Temperature (ECT) Sensor -G62-, Checking|Page 2194 > < Engine Coolant Temperature (ECT) Sensor -G62-, Checking|Page 2192