Martin wrote:

No, you have done the right thing, join the wires.

Now the wire from the alarm 10AS goes direct to the engine ECU, bypassing the cluster.

xmotor wrote:

Hello everybody,
The remote control works, I have tested all the sensors but I don't have a signal at the injectors.
At nanocom, the ECU Engine Management has disappeared. I only have Instrument pack.
I removed pins 3 and 4 and joined them behind the speedometer.
Can you help me?

Olivier
X MOTOR France

xmotor wrote:

Hello everybody,

I replaced the engine of the defender 2.4 TD4 with new injectors. Once everything was reassembled, I tried to start and the engine started without any problems. Since I hadn't primed the oil pump yet, I shut down the engine immediately. I removed the green 30A fuse under the passenger seats. I primed the oil pump to the starter. Once primed, I put the fuse back on and the engine never wanted to start again.
The remote control works, I have tested all the sensors but I don't have a signal at the injectors.
At nanocom, the ECU Engine Management has disappeared. I only have Instrument pack.
I removed pins 3 and 4 and joined them behind the speedometer.
Can you help me?

Olivier
X MOTOR France

Ianh wrote:

xmotor wrote:

Hello everybody,
The remote control works, I have tested all the sensors but I don't have a signal at the injectors.
At nanocom, the ECU Engine Management has disappeared. I only have Instrument pack.
I removed pins 3 and 4 and joined them behind the speedometer.
Can you help me?

Olivier
X MOTOR France

Is the Nanocom still not seeing the engine ECU ? If so it could be an ECU issue, I.e connector, fuse, wiring ,a faulty ECU or a CAN bus issue.

blackwolf wrote:

xmotor wrote:

Hello everybody,

I replaced the engine of the defender 2.4 TD4 with new injectors. Once everything was reassembled, I tried to start and the engine started without any problems. Since I hadn't primed the oil pump yet, I shut down the engine immediately. I removed the green 30A fuse under the passenger seats. I primed the oil pump to the starter. Once primed, I put the fuse back on and the engine never wanted to start again.
The remote control works, I have tested all the sensors but I don't have a signal at the injectors.
At nanocom, the ECU Engine Management has disappeared. I only have Instrument pack.
I removed pins 3 and 4 and joined them behind the speedometer.
Can you help me?

Olivier
X MOTOR France

If the engine started and ran the first time it is unlikely that there is any particular fuel system problem, such as air in the system. It is more likely that something else has gone wrong whilst you primed the oil pump.

[b]I was surprised that the engine started at the first stroke of Neiman. Even though I hadn't started the fuel system. I think it started because there was fuel in the new engine.


I assume the fuse you refer to is BJB Fuse 5 (in which case I am a little surprised that the engine cranked)? I presume that you cranked the engine on the starter in order to prime the oil pump?

I tried to start the engine before removing the fuse and the engine started. After removing the fuse, I primed the oil pump to the starter and when I put the fuse back on the engine never restarted.

My initial suspicion is that for some reason the ECM hasn't powered back up correctly. If the ECM has no power or is missing some of its power inputs then the Nanocom won't see it and the engine won't run. Does it actually still crank?

The engine runs on the starter but does not start

Another possibility, although I think it is unlikely, is that whilst cranking the engine to prime to oil pump with the ECM powered down, you have over-pressured the fuel rail and popped the relief valve. If this is the case you will have little or no fuel rail pressure and the engine probably won't start, but this on its own would not explain the unresponsive ECM. Also for this to happen the VCV would have to have been fully open when cranking to prime the oil pump, and I am not sure if 5this is possible - again it depends on what you actually disabled by removing the fuse.

I replaced the VCV and have a fuel pressure indication on the nanocom. So I think the injection pump is putting pressure in the boom. If the pump is offset at the distribution level, can I not start. It's weird is that it started at the very beginning so the timing of the distribution is good or it has been shifted

I suggest your first priority is to investigate why the ECM is unresponsive and check that there is power everywhere there should be. I don't think you have a fuel problem at this time, I think you have an ECM problem.

I've checked all the sensors, replaced the crankshaft sensor and everything is powered. I don't know how to check the status of the engine ECU



Check BJB Fuse 5, the un-numbered fuse in Holder P110 (C0602), CJB Fuses 38 and 39 to begin with.

Assuming that the engine is cranking, then failure of either the crankshaft or camshaft position sensors will cause it to fail to fuel. It will aslo fail to fuel if it believes that there is no fuel in the tank, however none of these would cause a loss of comms between Nanocom and the ECM.

Martin wrote:

If the rpm needle moves during cranking it probably isn’t the crank sensor.

The "shunt" is actually a bypass of the wiring of the immobiliser comms link through the instrument pack.

Land Rover did this themselves when the 2.2 was introduced.

You need to access the instrument pack connector, remove it and make a temporary link between pins 3 and 4 with the likes of a straightened out plain metal paper clip.

If it now fires, your problem is the immobiliser link and you have two options:

Send the instrument pack for repair of the soldering of the socket to the PCB (I can do this for you through my business) - or do it yourself if capable

Alternatively dismantle the connector and remove pins 3 and 4 (light green and grey wires to both) and join them permanently. Or if you like, cut the light green and grey wires where they enter the connector and join the loom sides together permanently, bypassing the cluster.

This makes the comms link between the 10AS alarm/immobiliser and the ECU a single wire without the instrument pack in the circuit (as per the 2.2).

The instrument pack will now log a fault if diagnosed as it does not see an incoming signal from the immobiliser, but this does not affect the instrument pack or vehicle operation whatsoever.

Also I feel this is NOT a security issue as the immobiliser itself is not bypassed, and this factory design of "in and out" wiring via the instrument pack only means that the engine won’t start if the instrument pack is missing.

However a missing instrument pack would be no problem for a thief as bridging 3 and 4 (on the now easily accessible connector) restores the link, which is clear from the wiring diagrams.

I fixed a 2010MY basic spec Puma with this issue last week. It would crank, and the RPM needle moved, but an signal tester showed the ECU wasn’t firing the injectors at all. Bridging 3 and 4 allowed it to start straight away