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This instruction show you guide on how to solve JCB JS140/205/215 excavator C1022-13 trouble code coolant temperature sensor open circuit error.
Possible Cause:
1 Coolant temperature sensor wire harness not connected to Coolant temperature sensor.
2 Faulty coolant temperature sensor.
3 Poor wire harness connection at MECU.
Related Contents:
2025 JCB ServiceMaster 4 v25.1.0 Free Download for Win 10 Win11
2017 JCB Parts Plus+ and Repair Service Manual Free Download
JCB Diagnostic tool
Diagnosis:
1 Check the coolant temperature wire harness connector connected to coolant temperature sensor on engine or not. Refer below photograph.
2 Check the coolant temperature sensor resistance by help of multimeter.At 80°C the approximate resistance of sensor shall be 323Ω.
3 Check the circuit 4069 in cavity 17 & circuit 4303D in cavity 3 of MECU connector are connected properly or
not. In cavity 17 & Cavity 3 terminal back out should not there.
Corrective Action:
1 Connect the wire harness with the Coolant temperature sensor.
2 Replace the faulty sensor.
3 Connect MECU with machine wire harness properly.
More topics for JCB machine,please refer to:JCB Machine Trouble Repair.
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