I am clutching at straws but would appreciate it if some-one could tell me how the immobilizer works. I understand that the immobilzer communicates with a chip in the ignition key and prevents the engine from starting. My question is, if the immobilizer is active will the engine turn over on the starter motor or does the immobilzer prevent the starter motor from operating?
In very brief summary the following is a summary of the events that have led to my question.
1. Jack was running on 3 cylinders so I put in a complete set (4) reconditioned injectors.
2. After the installation of the reconditioned injectors Jack started (after a little persuasion) and ran on all four cylinders for approximately 10 minutes, then just stopped (as if ignition key had been turned off). Since then the engine turns over but will not fire.
3. Since this occurred I have:
- removed and cleaned the ignition wiring harness by bathing in meths, checked each wire fro continuity.
- made sure the timing marks on the camshaft pulley and the oil pump pulley line up at the same time while the No: 1 piston is at top dead centre on the compression stroke (double checked by removing the No:1 injector, verifying the position of the piston and confirming that all the valves were open or closed as appropriate.
- replaced the camshaft sensor
- removed and cleaned the high pressure oil control valve following instruction found on this forum (got a lot of junk out of it
- replaced the oil rail pressure sensor
- confirmed that there is a good flow of diesel to the inlet manifold, even checked the flow of diesel from the fuel return line at the fuel tank with the engine being cranked over.
- had the local Holden dealer check with his Tech2. His report stated;
"Carried out scan tool diagnosis - no codes are present, looked at still data found injectors disabled, tried to program ECM/Injector fuel trim but was unable to input right code. Recommend find correct fuel trim code and program Fuel Trim "Injector ECM"" Note there is an injector signal pulse & fuel pressure, RPM signal ECM no abnormal readings at time."
- thanks to this forum I now know the injector categories and although the workshop states that new injectors have to be programmed with a Tech2, the injectors suppliers and a number of contributors to this forum state that this is not necessary (all replacement injectors are Category B-1, B-2 or B-3) and I am inclined to go with the latter, however, once again clutching at straws I will get the Tech2 back to carry out this programming, test the injector circuits, confirm the crankshaft sensor is working okay and to look for any other fault codes.
I have prepared a detailed Tech2 programming and testing schedule for the Holden guys to follow as the local Holden guys have never worked on Jackaroos, however I am not super confident that the next application of the Tech2 will fix the
problem
Clutching at straws, could it be a malfunctioning engine immobilizer?
I am not very confident that