Does anyone know what type of crank position sensor is used on 88-91 and 92-95 Hondas? For example: a hall effect sensor? Where is it located? Are they different between OBD systems? What is the voltage resolution -min to +max? Does anyone have a sample output graph from an actual Honda?

Thanks for having a read
Thanks for any information

 

It's usually in the distiributor for those years (at least the '92-'95 range).

Not sure if it's technically a hall-effect sensor, but it's similar in the sense that it's not optical nor contact.

They changed once or twice over the years, but it didn't always correspond strictly to OBD-type.

I don't know exactly what the signal looks like.

 

They are Variable reluctor.

MPFi uses three sensors while DPFi used two. The Honda ECU triggers on the negative going slope first, so polarity matters when wiring these sensors up.

Give me your e-mail, I'll give you more info (it's a .pdf).

 

There is no crank sensor for the years you mentioned. It is referred to as the TDC sensor in the distributor. My tech just relocated my H22A4 crank sensor wires to my TDC sensor in my H22A. Keeping the car OBD2.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by invincible_hf &raquo;</TD></TR><TR><TD CLASS="quote">Does anyone know what type of crank position sensor is used on 88-91 and 92-95 Hondas? For example: a hall effect sensor? Where is it located? Are they different between OBD systems? What is the voltage resolution -min to +max? Does anyone have a sample output graph from an actual Honda?

Thanks for having a read
Thanks for any information </TD></TR></TABLE>
88-01 mpfi civic/integras all use a CKP pickup sensor located in the distributor. Honda calls it a magneto inductive pickup(other car makes call it a variable reluctor, permanent magnet etc) which produces a sine wave signal. As the 24 teeth CKP trigger wheel passes by the pickup it induces voltage which is then sent as input signal to the pcm. The voltage resolution varies, the amplitude and frequency of the sine wave increases as the rpms go up, the faster the trigger wheel passes the pickup the more voltage is induced. During startup which is around 250-400rpms the induced voltage is in the - + Millivolts range, during normal operations - + its in the volts range.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JBirch_97Prelude &raquo;</TD></TR><TR><TD CLASS="quote">There is no crank sensor for the years you mentioned. It is referred to as the TDC sensor in the distributor. My tech just relocated my H22A4 crank sensor wires to my TDC sensor in my H22A. Keeping the car OBD2.</TD></TR></TABLE>

The TDC sensor in the distributor is only used during start up to increase the start up time. The signal from CKP and CYL (aka cmp, sync, cylinder 1) is all thats needed to know the piston position in order to run the fuel and ignition system correctly. It is almost impossible to run your engine using only the TDC sensor on a stock honda computer, regardless if its chiped running hondata, neptune etc.

 

Thanks for setting things straight!

 

that would be great...

turbonetics.turbos at yahoo