My 1997 Peugeot 106 Diesel won't start, no fuel from pump to injectors. I didn't think there was any electronic witchcraft on a 97 car, I just thought the stop solenoid might be stuck, and as you can't get to it under a tamper-proof cover, even to check wire continuity, I swapped the pump for one out of another 97 106. Still didn't work. No way to find out how to test the electrical connection, although I noted that one wire comes live when the ignition is on, but evidently it doesn't by itself actuate the solenoid. Then I looked at the ignition switch and realised there's a key chip transponder coil immobilizer which presumably acts on the pump stop solenoid. So I swapped it for the coil unit and key 'head' also off my old car. Still no good. Is there an ECU on a model that old? Is that what needs resetting? Since nothing else on the engine is ECU controlled, if there is one can it be bypassed? Or can the pump electrical connections be modified to activate the solenoid, joining two wires together perhaps? Surely all it needs is a 12V feed and an earth to the correct wires to actuate!

Tim, September 2022

The immobiliser is a pain . I had this, drove to a job and it just cranked over when I wanted to leave. Had it dragged home and tried everything with the immobiliser so decided to bypass it. The connection you want to get on to is inside the tamperproof cover! there's an electronic gizzmo that contacts the solenoid on the pump inside the cover. That cover took me 3 hours to get off!! You even have to remove injection pipes and a roll pin that is on the angle because it goes past a flange purposely to stop you getting the cover off! Once in though, just connect the solenoid to a live when ignition is on wire using the clip that's attached to the solenoid and Bingo! Brrrm Brrm!
You will need every tool available including a dremmel with a grind stone (I went through four bits!)

Dekzion, June 2025

This might, repeat might, help.

https://www.ebay.co.uk/itm/370846622012

Enej, September 2022