Description - engine management (ENGINE MANAGEMENT SYSTEM - V8) (page 15 of 43)

ENGINE MANAGEMENT SYSTEM - V8

18-2-20 DESCRIPTION AND OPERATION

There are three types of ECT sensor diagnostic checks:

l

The ECT sensor signal is within limits, but is inaccurate – the engine has to be running and the signal indicates 
a coolant temperature below 40

°

C (104

°

F). The signal differs too much from the coolant temperature model for 

longer than 2.53 seconds.

l

The ECT sensor signal is greater than the maximum threshold value – the ECM has to be powered up to perform 
the diagnostic, but the engine does not need to be running.

l

The ECT sensor signal is less than the minimum threshold value – the ECM has to be powered up to perform 
the diagnostic, but the engine does not need to be running.

Should a malfunction of the component occur the following fault codes may be evident and can be retrieved by 
TestBook:

P code

J2012 description

Land Rover description

P0116

Engine coolant temperature circuit/range 
performance problem

Signal differs too much from temperature model for 
longer than 2.53s

P0117 

Engine coolant temperature circuit low input

Open circuit or short circuit to battery supply

P0118

Engine coolant temperature circuit high input

Short circuit to earth