I just measure something coming out of the sensor which was disconnected from ECU plug while the engine was running the voltage reading was 0.01v and aslo I did check when sensor was connected to the engine ECU plug when engine was running the voltage reading was same 0.01v. what do you thing this is ECU not working properly or sensor itself not working properly ? I did check many same sensors they all have same reading voltage 0.01v
The output from the sensor itself will be minuscule - most test meters wouldn't even register a signal at all and certainly a person unfamiliar with what they were expecting/looking at would have no idea if it was right or wrong. It could be shown, very positively, using an oscilloscope - not even an expensive one! There are cheap (£20) 'scopes that would show the signal (not that you actually need to see it for yourself - take my word for it!).
Regardless, the signal, as applied to the components shown as attached to pins 8/31, must be a small sinusoidal signal as the circuitry is designed to rectify it and deliver a single pulse to the following circuitry - whatever that is; it's not shown...... The sensor can be inferred to be a piezo-type device (basically a crystal) as it doesn't
require a supply voltage, it
generates one. Piezo crystals do just that - they take mechanical movement (detonation) and convert it to a small electrical signal.
The circuitry inside the ECU (in respect to the input from the detonation sensing) is very unlikely to be damaged as there's nothing short of a lightning strike that could do harm. That the ECU is firing the injectors (albeit, according to you, both sets at the same time) means the output side also seems ok.
Are you SURE they are firing 'together' and not individually?
Also when ignition is ON the engine ECU should have present 5v at connector of cylinder identification sensor there is no 5v present.
Not according to the schematic......
Given the signal is very small it could be that it is being 'lost' on the way - is the wiring secure? What form is the cable carrying this signal i.e. is it a screened cable or two cores? I'd suggest that the signal 'should' be carried on a screened cable (or a twisted-pair) to prevent interference and that the wiring certainly should be kept away from other 'noisy' signal wires (such as ignition cables). If it is screened cable then is the screen properly earthed (grounded) as this is essential to protect the signal from the noise.