Cherokee 2WD L6-242 4.0L VIN M FI (1987)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Fig. 2 Coolant temperature sensor resistance values
Fig. 3 ECU connector terminal identification
1. Disconnect electrical connector from CTS.
2. Using a suitable ohmmeter, check resistance of CTS, Fig. 2.
3. If resistance is not within limits, replace CTS.
4. Check CTS wiring for continuity between ECU electrical connector terminals D-3 and C-10, Fig. 3, and sensor electrical connector terminals. If
circuit is open, repair wiring as necessary.
