406 non-runner

[kevinday284]

hi guys
my 406 was running ok then one morning it would not start I gave it a jump start and she fired up and since then ive had not luck getting her started I called AA 1st time and he said it was the glow plug relay so I changed it and still the same so called AA again next other bloke came and the said I got a fault with the ECU coz got power to the glow plug relay and power to the 4 pin plug underneath the relay but no power to glow plugs he thinks the ECU is not giving the signal to the relay to fire up .

can anyone help please Very Happy .

cheers guys

[madmadmax]

is this a hdi if it is then its not the glow plugs, i would look at the in-tank pump.

[lozz]

Is the lift pump under the back seat priming
If not check the inertia cut off switch
Then the relay next to the ECU,

[kevinday284]

yes its a 2.0 hdi 90 bhp and how would I know if the lift pump under the back seat and what relay next to the ECU and were is the inertia cut off switch I know I have a black bulb under the bonnet to pull diesel up from tank

cheers guys for ur help n this matter

[Captain Jack]

Yeah, I ran my car with faulty glow plug relay for 3 years and it only had a little trouble starting in the winter.

In-tank pump would be my next step. Can you hear it whirring when you turn ignition on?

[lozz]

The inertia cut off switch is near the suspension leg
Passenger side, look near the battery,

Brown double relay, if its got one shouid be under the ECU cover drivers side
Cam side of engine,

Is the lift pump whirring when you put the ignition on.

[kevinday284]

im will try in morning as disconnected the battery as I saw something on a other forum about reseting ECU if u disconnect the battery over night .

I will report back in morning and let u guys know out come

thanks for all the help

[steve_earwig]

Is this a Siemens or Bosch? The reason I ask is if it's a Siemens it doesn't have a lift pump.

[kevinday284]

hi steve yes it is a siemems ECU so it don't have a lift pump

[Captain Jack]

Can you check whether you have fuel flowing to the injectors? Disconnect one of the return pipes and crank the engine - you should see fuel trickling out of there.

[kevinday284]

thank you captain jack I will try that .

I thank you guys & girls for all your help its been a great relief that I've come on to this forum and getting great help and advise for you all

[kevinday284]

the latest on the non runner !!!!!!!!!!!!

got no brown double relay

can't find the inertia switch by passenger side

and got fuel thou to injectors

had battery disconnected for over 24 hours to try and reset ECU and nothing im now lost in what to do next

[lozz]

Can you post up a PIC of under the bonnet mate,
I'm pretty sure it shouid have a inertia switch

[kevinday284]

ok lozz I see if can post one up I got a local mobile mechanic coming this afternoon to diagnostic test on car

[kevinday284]

here the pic's lozz