My xantia suddenly cut out and after checking everything else figured icouldn't hear the fuel pump when i turned on the ignition i just dontknow where the relay is.It's a 1996 citroen xantia 1.8 petrol thanks.
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Re: citroen xantia fuel pump relay
If the pressure is up the pump will not cut in anyway! slacken off a fuel line to the injectors a little and drain a few cc of fuel out (it will evaporate fast) then try again, if the pump runs for a couple of seconds then look at the spark, if it doesnot the relay is above the fuses.
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the operation of most fuel pumps is controlled by the fuel pressure regulator
when the fuel pump gets to set pressure , the pump is switched of by the ECM at the relay level
maybe nothing wrong with your system just the system working as designed
if you have pressure in the fuel manifold when you turn the ignition on then the pump will not run but will if there is a fuel leak somewhere and the pressure drops off
code p 0230 refers to fuel pump relay---circuit malfunction===causes --wiring---fuel pump relay-- ECM
check wiring for bad connections
replace the ECM with a known good unit as it may be breaking down electronically in the circuit that controls the pump relay
Check the pressure regulator as well as it reports to the ECM to shut off the pump relay when the fuel pressure is reached and not being used
If it's an automatic, check if the lever is at P or N. Check if your car has immobilizer that needs you to enter codes before it will start. Gauges moving full scale usually indicates that the instruments cluster is 'missing' an additional IGN supply. When you turn your key to the ON position, all lights in the cluster will light up. This position will make the ignition switch supply 2 IGN power to most electrical systems. If one is missing, the car may not start. Check all fuses under the fascia and in the engine bay. Be on the look out for fuses that have melted 'seats'. They may give intermittent power. Xantia's fuse slots gets melted with age, so the fuse becomes loose and supply gets disconnected.
The S light is also used like a 'check engine' light for auto transmission. There maybe some error in the transmission control system. You transmission has a computer that controls a lot of valves and solenoids in it. Check your transmission fluid level and it's integrity. If you have not changed the fluid for the last 50000kms then it's due for a change. Use only Peugeot recommended fluid. Other fluids will damage it. Mention your transmission type when buying. It's either AL4 or 4HP20. Best to buy it from authorized dealer. Garages that have a Lexia 3 scanner can scan for error codes for the transmission.
Your fuel injection pump may need to be re calibrated. Check,clean or replace fuel filters if not done yet. Check pre-heating circuit runs properly. Diesel train tends to get ingested with water more frequently. Drain fuel filter of any water.
Check Fuse F3. It supplies 12v to the reverse switch located on the transmission. If auto transmission (4HP14) the switch will have 4 pins, 2 for reverse light, 2 for starting circuit. If manual, it has two pins. When gear is in other position, only one pin will have 12v. When gear is in R, both pins will have 12v. The 2nd pin supplies directly to the reversing light. Fog light has connectors behind the bumper. It tends to get corroded. Disconnect and clean both side of the connectors and retry. Some may get the wires snapped. Check there first. Fuse F18,F7 and F6 supplies 12v to the foglight circuit. F6 supplies to the foglight relay. Check the relay too.
turn off everything and turn your ignition to on when it is as quiet as possible. When you turn the key to on you should hear a soft whirring sound for 2-3 seconds. If you dont your fuel pump is bad. Disconnect a plug wire and lay it on top of the motor with a screwdrived in it and turn key-you should see a spark coming off it.
Possible causes: Fuel pump relay, Pump, Fuel Filter, Regulator, Crank Shaft Sensor, Camshaft Sensor, Loos Connection(try to wiggle the wiring harness and observe). or faulty Ignation Switch.
Observe if the engine will lack of power first before to shut off, if this is the scenario it could be a fuel pump relay or pump. I suggest you to monitor the fuel pressure first or try to swap fuel pump relay to other as long as same color or figure and observe it.
If the senario is sudden cut off, it coud be a faulty cranck shaft sensor. a faulty cranck shaft sensor is easy to determine using tachometer while cranking, if the sensor is faulty the tachometer will not move or rise even a little bit if it's good it will rise a bit while cranking the engine.
Check fuel pump when the problem occur, try to ignition ON/Off and listen to fuel pump motor noise from underneath (close to rear right side tire), the pump will operates for aprox 5 sec. everytime you turned ON the ignition switch. and if you can't hear noise then you have to focus to fuel system.
the fuel filter should be on the fronnt right of the head (black canister with 4 allan key bolts on top) or front center of the head(oval unit)
it is possable that the fuel pump has gone down or the fuel cut off switch has been activated this is located on the n/s/f inner wing on the top strut mount