Hi!
If I have stepped over the mark here on reverse engineering something I apologise now
But here goes...
A mate of mine showed me a little box on his car that he said allowed him to overboost his turbo.
Knowing I was interested in electronics he was hoping I could make him another to use on another vehicle.
I took a look and found it had 3 wires going into it - one went to earth, the other two were where an original wire going into the ECU had been split - so this was obviously messing with the signal coming from the turbo boost whatever - with no power it must be passive components only - I was feeling quite confident.
I only had a multimeter to hand and tried checking the resistances between the wires and this is where I became very confused.
The multimeter I was using had red and black leads and the red lead was positive.
If I describe the three wires as (E) Earth (S1) Signal1 and (S2) Signal2 I got these readings:
Plus Minus Resistance
E(+) S1(-) Infinite
S1(+) E(-) 25.12M
E(+) S2(-) Infinite
S2(+) E(-) 23.2M
S1(+) S2(-) 0.4ohms
S2(+) S1(-) 0 (effectively wire)
There was very little fluctuation on the measurements making me doubt there are any capacitors in there.
The E<->S1 and the E<->S2> can be described by a diode and a suitable resistor
but I don't really understand how the S1->S2 can be 0.4 but S2->S1 be 0!!
Can anyone shine a light on this?
If I have stepped over the mark here on reverse engineering something I apologise now
But here goes...
A mate of mine showed me a little box on his car that he said allowed him to overboost his turbo.
Knowing I was interested in electronics he was hoping I could make him another to use on another vehicle.
I took a look and found it had 3 wires going into it - one went to earth, the other two were where an original wire going into the ECU had been split - so this was obviously messing with the signal coming from the turbo boost whatever - with no power it must be passive components only - I was feeling quite confident.
I only had a multimeter to hand and tried checking the resistances between the wires and this is where I became very confused.
The multimeter I was using had red and black leads and the red lead was positive.
If I describe the three wires as (E) Earth (S1) Signal1 and (S2) Signal2 I got these readings:
Plus Minus Resistance
E(+) S1(-) Infinite
S1(+) E(-) 25.12M
E(+) S2(-) Infinite
S2(+) E(-) 23.2M
S1(+) S2(-) 0.4ohms
S2(+) S1(-) 0 (effectively wire)
There was very little fluctuation on the measurements making me doubt there are any capacitors in there.
The E<->S1 and the E<->S2> can be described by a diode and a suitable resistor
but I don't really understand how the S1->S2 can be 0.4 but S2->S1 be 0!!
Can anyone shine a light on this?