Re: Hello Chaps....new owner
Posted: Thu Feb 25, 2021 4:34 pm
If that photo is of the double injection relay, and its connector, then the relay pins look all in one piece, but desperately need cleaning up. Use contact cleaner, cotton buds, and a fine emery board to get back to clean metal. Remove all cleaning residue.
That may be the cause of the problem, however, what you must check is that the two +12 supplies to the relay are both present:
- permanent Batt+ to pins 15,8,14,11, via F31
- + to pin 2, via IGN sw
John is right to detail that there were lots of variations of that double relay. Bitron were the original makers, but current replacement types will probably be labelled Omron (who now own Bitron). Type 240.104 was also fitted to the 2.5 here, and its replacement is 240.101, Citroen pt.no. 1920 3X. This is still available, and is fitted across a long list of vehicles. The internal wiring diagram (moulded into the cover) is the same as 240.104.
These relays (in particular the diodes in them), are a known failure point - sometimes provoked into failure by something else - and can prevent an engine from starting, or dealing with a keypad (if present) properly.
Worth obtaining a replacement from Citroen, but you must check those supply voltages first. Without them, it cannot work.
You should look at this first, Alasdair, as without that relay operating, there can be no fuel injection.
Do the checking with a small test lamp (eg 12v 5W), with the relay unplugged, on the connector socket - one end of the test lamp to a reliable Ground. Report back what you find.
That may be the cause of the problem, however, what you must check is that the two +12 supplies to the relay are both present:
- permanent Batt+ to pins 15,8,14,11, via F31
- + to pin 2, via IGN sw
John is right to detail that there were lots of variations of that double relay. Bitron were the original makers, but current replacement types will probably be labelled Omron (who now own Bitron). Type 240.104 was also fitted to the 2.5 here, and its replacement is 240.101, Citroen pt.no. 1920 3X. This is still available, and is fitted across a long list of vehicles. The internal wiring diagram (moulded into the cover) is the same as 240.104.
These relays (in particular the diodes in them), are a known failure point - sometimes provoked into failure by something else - and can prevent an engine from starting, or dealing with a keypad (if present) properly.
Worth obtaining a replacement from Citroen, but you must check those supply voltages first. Without them, it cannot work.
You should look at this first, Alasdair, as without that relay operating, there can be no fuel injection.
Do the checking with a small test lamp (eg 12v 5W), with the relay unplugged, on the connector socket - one end of the test lamp to a reliable Ground. Report back what you find.