Technical Key Code Warning Light

[corcai]

Thanks to you and rayc...I am hoping also somebody will respond about bypassing the pump as a workaround on the X250.

Bypassing the pump only applies to mechanical injection systems where the only thing that stops the engine working is a solenoid to cut off the fuel.

Your van is electronic injection the only way to bypass the immobiliser is to remove and reprogram the ECU and usually cut a wire to the ECU.

You should be looking to fix the problem instead.

 

[varesecrazy]

Bypassing the pump only applies to mechanical injection systems where the only thing that stops the engine working is a solenoid to cut off the fuel.

Your van is electronic injection the only way to bypass the immobiliser is to remove and reprogram the ECU and usually cut a wire to the ECU.

You should be looking to fix the problem instead.

Agreed,

but Johndw is probably better getting an auto electrician to find the issue - rather than send the ECU away in hope..,

Charlie

 

[Johndw]

Thanks to corcai and varesecrazy for your replies. I will try and find a suitable auto electrician in the Hitchin area.
John

 

[Johndw]

Thanks to all those who replied re the key code warning light. I had the vehicle recovered to a Fiat Professional garage in Dunstable. They identified the main injection relay T09 of junction unit B001 which controls the entire system had failed. When working properly the coil receives a direct battery power supply via the line protected by fuse F18 of the engine compartment junction unit.
This relay is energized by an (earth) control signal from pin 72 of connector B of the engine management control unit M010 and then forwards
a power supply:

to pin 1 of connector B of the control unit, via the line protected by fuse F17 of B001 ;

to pin 5 of connector B of the control unit, via the line protected by fuse F22 of B001 ;

to pin 6 of the heater plugs control unit M015, via the line protected by fuse F11 of B001; this power supply also reaches the EGR solenoid valve L030, the throttle casing solenoid valve L062, the oil vapour heating resistance O007 (if present) and pin 4 of the Lambda sensor K040.
So I have bought a spare!
The whole job cost £164 so I was much relieved.

 

[Guuseppe2103]

Agreed,

but Johndw is probably better getting an auto electrician to find the issue - rather than send the ECU

Thanks to all those who replied re the key code warning light. I had the vehicle recovered to a Fiat Professional garage in Dunstable. They identified the main injection relay T09 of junction unit B001 which controls the entire system had failed. When working properly the coil receives a direct battery power supply via the line protected by fuse F18 of the engine compartment junction unit.
This relay is energized by an (earth) control signal from pin 72 of connector B of the engine management control unit M010 and then forwards
a power supply:
to pin 1 of connector B of the control unit, via the line protected by fuse F17 of B001 ;
to pin 5 of connector B of the control unit, via the line protected by fuse F22 of B001 ;
to pin 6 of the heater plugs control unit M015, via the line protected by fuse F11 of B001; this power supply also reaches the EGR solenoid valve L030, the throttle casing solenoid valve L062, the oil vapour heating resistance O007 (if present) and pin 4 of the Lambda sensor K040.
So I have bought a spare!
The whole job cost £164 so I was much relieved.

away in hope..,

Charlie

Bypassing the pump only applies to mechanical injection systems where the only thing that stops the engine working is a solenoid to cut off the fuel.

Your van is electronic injection the only way to bypass the immobiliser is to remove and reprogram the ECU and usually cut a wire to the ECU.

You should be looking to fix the problem instead.

I have similar issue key code waring light coming on and now being stable on dashboard but engine starts fine. Only issue is when I do not use it for 10 hours at least. Often in the morning has problem to start but the with a shorter rest Intervals will start fine. Can this be relate to engine being flooded? . At the beginning I though was the battery but I changed it and made no difference

 

[Communicator]

I have similar issue key code waring light coming on and now being stable on dashboard but engine starts fine. Only issue is when I do not use it for 10 hours at least. Often in the morning has problem to start but the with a shorter rest Intervals will start fine. Can this be relate to engine being flooded? . At the beginning I though was the battery but I changed it and made no difference

Vehicle details?

 

[Guuseppe2103]

Vehicle details?

Fiat Ducato 1.9 TDI 1999

 

[Communicator]

Fiat Ducato 1.9 TDI 1999

So 25 years old. It sounds as though the electronics have developed a fault. It may continue to start OK, but????? Consider how many other electronic items do you have of that age? Phone, TV, radio, camera? What happens if it fails to start?
The cold starting could be due to a glow plug problem. My experience with older even older vehicles, was that glow plugs were only essential for first start of the day.

At least you haave the option of removing the immobiliser from the pump, if you decide to go that way.

 

[varesecrazy]

So 25 years old. It sounds as though the electronics have developed a fault. It may continue to start OK, but????? Consider how many other electronic items do you have of that age? Phone, TV, radio, camera? What happens if it fails to start?
The cold starting could be due to a glow plug problem. My experience with older even older vehicles, was that glow plugs were only essential for first start of the day.

At least you haave the option of removing the immobiliser from the pump, if you decide to go that way.

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