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Home >> Toyota >> 1995 >> Celica ST, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 1.8L >> Diagnostic Testing >> Code 22 - Coolant Temperature Sensor (Cts) Circuit >> Circuit Description

Circuit Description

The CTS sensor is a thermistor sensor that monitors water temperature. CTS sensor is located next to heater hose connection on side of cylinder head. Code is set when ECM detects a open or short circuit. Possible causes are:

NOTE: If Codes 22, 24, 31 and 41 are output together, inspect ECM terminal E2 (ground) circuit. Repair as needed. See wiring diagram in the WIRING DIAGRAMS - 1.8L article.
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