I searched, pgmfi.org, htech.com, google, boosted-hybrid, to no avail. Some hinted, but nothing set in stone.

I'm trying to find the resistor value to simulate the O2 for the heater circuit.

I'm currently running my Zeitronix on my P0B ECU (95 Accord). Everything's working fine, but I'm getting the heater circuit CEL for obvious reasons.

This will become a non-issue when I move my p05 into place and disable heater, but was looking for a fix in the time being. Thanks.

 

10K, something that can sink a decent amount of power might be a good idea - at least 1/2W, maybe even 1W. One end to ECU, one end to +12v - ECU switches ground.

 

Thanks - will give it a go

 

I'm not sure what it is on your car, but typically it is around 20 ohms. I went to the local electronics surplus store here in orlando and bought a sand cast 20 ohm 5 watt power resistor. So far it has been working just fine....

If you use too large of a resistor your car will throw a CEL because the ECU thinks somethings wrong with the heater....

 

The larger the resistance the better but I'm not sure how large you can go before you get a CEL. Just keep the wattage your pumping in mind, too low of watage resistor will burn up fast. Power = Voltage * Current. Current = Voltage / resistance. SOOoo, the Power of the resistor you use must be greater than or equal to 12v^2/resistance of resistor.

 

You could get a potentimeter and use a DMM to figure out the Ohm range it'll throw the cell in.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by toolowsol &raquo;</TD></TR><TR><TD CLASS="quote">The larger the resistance the better but I'm not sure how large you can go before you get a CEL. Just keep the wattage your pumping in mind, too low of watage resistor will burn up fast. Power = Voltage * Current. Current = Voltage / resistance. SOOoo, the Power of the resistor you use must be greater than or equal to 12v^2/resistance of resistor. </TD></TR></TABLE>

True, but I obtained this information from the Helm factory service manual.....the ECU is fairly particular about what it sees....

 

Hondata recommends an 1000 ohm resistor to bypass the heater circuit.

 

I've personally tried 10k ohm, 1k ohm, and a few others to no avail. I got frustrated and decided to measure the resistance. Turns out it was 11ohms in my case. I ran off and got a 10 watt 10 ohm resistor and it works wonderfully.

 

C'mon guys - Helms specs the O2 heater resistance between 15-40 ohms...so use something in that range as pollito has demonstrated.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TeamCracka &raquo;</TD></TR><TR><TD CLASS="quote">You could get a potentimeter and use a DMM to figure out the Ohm range it'll throw the cell in.</TD></TR></TABLE>

Most pots are 1/4 watt or so you would need something much bigger.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by toolowsol &raquo;</TD></TR><TR><TD CLASS="quote">

Most pots are 1/4 watt or so you would need something much bigger.</TD></TR></TABLE>

Ahhh, didn't know that! Thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pollito &raquo;</TD></TR><TR><TD CLASS="quote">I've personally tried 10k ohm, 1k ohm, and a few others to no avail. I got frustrated and decided to measure the resistance. Turns out it was 11ohms in my case. I ran off and got a 10 watt 10 ohm resistor and it works wonderfully.</TD></TR></TABLE>

Hi guys, I wired a 1k ohm resistor in between the to secondary o2 sensor black wires (A8 & B1 on ECU) but it didn't get rid of the secondary heater code.. This was done on a 00 civic SI (B16A2)... Do you guys think the 11k ohm resistor will work for me... Thanks.

 

 

you mean 11ohm, not 11k ohm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wantboost &raquo;</TD></TR><TR><TD CLASS="quote">you mean 11ohm, not 11k ohm</TD></TR></TABLE>

Okay... I'm going to radio shack tonight... Do I need a 11 ohm 10 watt ressistor? Trying to find the correct resistor has been such a pain... I just read that I could use two 10 ohm 10 watt resistors wired in series to aviod melting things? Does anyone know what will work for sure? Thanks for the posts so far

 

Components:
R1 100 K Ohm
R2 1 M Ohm
R3 100 K Ohm
R4 10 K Ohm
C1 4.7 uF
C2 22 uF
D1 1.7v@20mA LED
D2 1.7v@20mA LED


that should do the trick

platinum.




Modified by platinum00 at 6:15 PM 12/20/2004