29-04-2021, 08:47 PM
Welcome to the club. Firstly, I'm going to assume the pin out's on the ECU & other attached components are the same on the 306 version as on the 405. (I'm working off 306 wiring diagrams for the RFV).
As I mentioned in a previous post above I don't know which pin out's from the ECU are dependent on the security module functioning correctly (sending the appropriate signal to the ECU). The ECU is just a 'black box' on the wiring diagrams. If I were a gambling man though I'd say a lack of ground on pin 3 is security related. Without it the side of the relay that controls power to the coil pack & fuel pump (via the fuel cut-off switch) won't activate.
Two questions ...
1) will the car start if you provide a ground to pin 10 of the double relay?
2) When you say you changed over the ECU, have you tried one that has been unlocked?
As I mentioned in a previous post above I don't know which pin out's from the ECU are dependent on the security module functioning correctly (sending the appropriate signal to the ECU). The ECU is just a 'black box' on the wiring diagrams. If I were a gambling man though I'd say a lack of ground on pin 3 is security related. Without it the side of the relay that controls power to the coil pack & fuel pump (via the fuel cut-off switch) won't activate.
Two questions ...
1) will the car start if you provide a ground to pin 10 of the double relay?
2) When you say you changed over the ECU, have you tried one that has been unlocked?