Jaguar Workshop Service and Repair Manuals

Coolant Temperature Sensor/Switch (For Computer): Symptom Related Diagnostic Procedures

SYMPTOM CHART 

Condition(s): 

DTC P0116 ECT circuit range/performance problem 
Possible Source(s):
-

Thermostat

-

Coolant level/contamination

-

Sensor out of range

-

Harness open circuit

-

Connector loose or corroded
Action(s) to take:
^

GO to [Pinpoint Test A]

DTC P0125 Insufficient coolant temperature for closed loop fuel control
Possible Source(s):
-

Thermostat

-

Coolant level/contamination

-

Sensor out of range

-

Harness open circuit

-

Connector loose or corroded
Action(s) to take:
^

GO to [Pinpoint Test A]

DTC P0117 ECT circuit low input
Possible Source(s):
-

Sensor open circuit

-

Harness open circuit

-

Harness short

-

Connector loose or corroded
Action(s) to take:
^

GO to [Pinpoint Test B]

DTC P0118 ECT circuit high input
Possible Source(s):
-

Sensor short

-

Harness open circuit

-

Harness short

^ Connector loose or corroded

Action(s) to take:
^

GO to [Pinpoint Test C]