Discovery II
ENGINE MANAGEMENT SYSTEM - V8
18-2-16 DESCRIPTION AND OPERATION
It is vital that the CKP sensor output wires are not reversed (i.e. the connector is fitted incorrectly) as this will cause
a 3
°
advance in ignition timing. This happens because the ECM uses the falling edge of the signal waveform as its
reference or timing point for each passing tooth on the reluctor.
Whenever a new crankshaft position sensor is fitted or the flywheel is removed, the adaptive values will have to be
reset, using TestBook.
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
P0335
Crankshaft position sensor a circuit malfunction
Reference mark outside search window for more than
two revs, with engine speed above 500 rev/min
P0336
Crankshaft position sensor a circuit range/
performance
Incorrect number of teeth detected
±
1 tooth between
reference marks with engine speed above 500 rpm