Quote:
Originally Posted by Richard L
Before you do that, please read the voltage at test pin16 against ground, This shows what the controller sees.
0-5V = 0-100% DC.
Richard
|
Pin16 against ground on the board was 5.22V.
Quote:
Originally Posted by Richard L
If possible, please take a picture of the circuit board of the controller.
|
Quote:
Originally Posted by Richard L
Just realise, you have a scope!
I suppose there is no harm done with a capacitor as it has a large valve, it is unlikely to swing below ground level. It might not work because thereare no ground path on the H3 side.
Please describe the waveform of the injector pulse. Let me know if it is not a peak and hold circuitry.
|
Will do that tomorrow, now it's getting too late.
The capacitor didn't do anything.
I measured the voltage between an unconnected injector- wire and ground, it was 10.8V. Once the injector- is connected to the ECU pin3, the voltage drops to 0.12V (all at pre-crank). At the same time the injector+ sees around 11.8V.
This is what I found on the Trionic 5 injection system:
"The fuel injector valves are of solenoid type with needle and seat. They are opened by a current flowing through the injectors coil and are closed by a strong spring when the current is switched off. To ensure as optimal combustion as possible and with that lower exhaust emission the injectors are equipped with four holes, which gives a good distribution of the fuel. The squirts of fuel are very exact positioned (two jets on the backside on each inlet valve). This put very high demands on the fixation of the injectors. To secure this fixation the injectors are fixed in pairs by a special retainer between cylinders 1 – 2 and 3 – 4. The injectors are electrically supplied from the main relay, while the ECU grounds the injectors."