UK Car Repair Questions? Ask a Mechanic for Answers ASAP
OK looking at that other thread, 1st thing to check is if the power to the ECU is present ?
if you use a voltmeter on the ECU power fuse with the ignition on do you have 12V?
if you do then then next step is to inspect the wiring to the crank speed sensor on the flywheel / gearbox end of the engine
let me know what you find?
the ECU fuses are fuse 23 (glow plug module) in the fascia fusebox ( by the driver knee) and 32, 36 & 37
and the ECU relay is number 11 in the fascia location
and I've attached the ECU pinout diagram
also have you tried checking on fuse 40 in the fascia as this is for the fuel pump?
as it sounds like the root cause of it not starting is the fuel pump not running
do you still need help?
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this rather sounds like the tandem / lift pump isn't being powered up?
if you remove the fuel filler cap and flick on the ignition the pump should run for a few seconds
its located under the back seat and inside the fuel tank, lifting the back seat cushion will reveal a inspection hatch and under that will be the pump terminals
if you then run a 12V wire direct from the battery to the pump and it all springs to life then this would confirm this
the reason for this can be that the security system isn't disabling correctly? and I suspect the issue is with the ignition switch so I'd remove the steering column plastic trim and check over the wiring to the switch as the next thing and there is a 'conveinence unit' which handles the signal from the key fob and disarms the security
sadly replacing these is a job for the dealership as your existing keys will need 'coding' to the new unit for it all to work
I'd try tracing the wiring a bit further down the column to check for shorts and damage
as for the car to have been working when you beeped the horn I suspect that there's some damage
now this could be a faulty security module or a just a wirign issue from the ignition switch
there's a chip in the key thats recognized by the central locking module located in the fascia, this allows power to the ECU and other components