engine JAGUAR X TYPE 2004 1.G Diesel Camshaft Sensor Manual

X-Type Information
Diesel Camshaft Position Sensor - Jaguar Part Number JDE3763
(NB Petrol version is similar but different part numbers)
This document is a combination of advice gleaned from a variety of sources – hopefully it will be
helpful to you – no guarantees are offered or implied that it will be the answer you seek!
Function:
The Camshaft Position Sensor (CMP) is used to help the PCM (power-train control module)
determine the correct firing order. The engine will not run properly (sometimes not at all) without
this sensor’s input.
This sensor information is used to phase the sequential firing of the fuel injectors during normal
operation.
Electronic fuel injection systems rely on a number of sensors to control the delivery of the fuel and
air mixture to the engine. Of these the CMP uses the ‘Hall Effect’ principle to detect when a magnet
on the camshaft passes in front of it. Although it has no moving parts, the sensor is still subjected to
the extreme heat and vibration of the engine and will eventually fail over time.
Engine DTC codes:
Typical trouble codes:
P0340 - Camshaft Position Sensor Circuit Malfunction
P1336 - Crankshaft/Camshaft Sensor Range/Performance
Possible causes:
1. Bad sensor
2. Dirt or other contamination on the face of the sensor
3. Sensor disconnected
4. Wiring fault - such as a break or short circuit (where one of the wires is either
touching earth or is touching power). To check means examining the wiring for
damage due to a cable rubbing up against something.
5. Damaged connectors - may need to pull the pins out for cleaning. It is not
unknown for water to get inside and cause problems.
Symptoms:
A failing sensor can illuminate the MIL, and may cause any or all of these:
Extended cranking time with a cold engine
Intermittent rough running
Unstable idle
Hesitation
Poor fuel economy
Stalling on acceleration
Occasional loss of power while driving (flashing glow plug light while coasting to a
stop)
Sometimes starts first time after power loss
Sometimes it could take 5 to 10 minutes for it to start
Noisy Engine
(If it doesn't start then the glow plug light will be flashing)
Cure:
Replacing the defective sensor will usually resolve such problems.

X-Type Information
However, first check the plugs and wiring for signs of breakage or
corrosion. The sensor is a solid component with no moving parts. If the sensor is suspected of being
the problem, a basic test can be performed with a multimeter.
See this YouTube video for how to do it - http://www.youtube.com/watch?v=yeqzE_eNlio
Or visit this excellent website for further information
http://www.freeautomechanic.com/cmp-camshaft-position-sensor.html
Replacing a camshaft position sensor is an inexpensive and simple task which can be done by most
people with a few basic tools.
Tools: 8mm (5/16th) Socket to remove / replace the retaining bolt
Ability Level: All
Time: 10 minutes
Location of Camshaft Position Sensor:
The sensor is visible on the front of the engine just below the common rail slightly to the right of
centre – it has a wiring connector with three wires coming from it.
To access the sensor:
Remove the engine
cover to expose the top
of the engine so you can
access the CMP which is
about halfway along the
front near the top –
look for the three wires
on it. When you first
look for it, it may be
hidden by the Delphi
rail.
Using a socket and extension remove the 8mm retaining bolt to the right of the sensor:
Be careful not to drop it into the engine bay.
It is a bit tight for space – I used a magnetic pick up to make sure it could not fall.

X-Type Information
Grasp the sensor body beneath the wiring – DO NOT pull
on the wiring there is plenty to get hold of without
risking that – and jiggle it free whilst pulling gently
towards the front of the car. The sensor will simply slide
out of its mounting hole – the end was lightly coated in
engine oil which I cleaned off with a paper towel.
Remember when dealing with electrical components of
this nature that Jaguar advises you to disconnect the
battery, and have your radio code handy.
It is connected to the fuel injection system by a plug
with three wires, which will also need to be removed
and reconnected to the new sensor.
The connector on mine was clearly marked “Ford”
The CMP sensor was also marked “Ford” and was light grey in colour (looks white in these pics).
If you need a replacement it may be worth trying your Ford dealer as it will likely be cheaper than
from Jaguar