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Engine Coolant Temperature Sensor on Radiator, Checking|Page 2547 > < Coolant Temperature Sensor/Switch (For Computer)|Locations
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Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Engine Coolant Temperature Sensor on Radiator, Checking

Engine Coolant Temperature Sensor on Radiator, 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 (on

Radiator) (G83).

Special tools, testers and auxiliary items required

‹› Multimeter.

‹› Wiring diagram.

Test requirements

‹›  The 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 cold.

Test procedure

-

Perform a preliminary check to verify the customers complaint. Refer to =>  See: Computers and Control Systems/Testing and Inspection/Scan
Tool Testing and Procedures/Diagnostic Mode 09 - Read Vehicle Information.

Start diagnosis

Checking internal resistance

-

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

Engine Coolant Temperature Sensor on Radiator, Checking|Page 2547 > < Coolant Temperature Sensor/Switch (For Computer)|Locations