Miatapower List Archive

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Mail From: Bill Cardell <(email redacted)>


Wire colors at ecu, per '99 shop manual.
blue=signal
blue/yellow= +12
black/white power ground
black/red= signal ground.


Bill Cardell
The Dealer Alternative, Inc
dlralt.com
200mphmiata.net
1-800-FLY-MX5S (orders only)
1-970-242-3800 (tech)


-----Original Message-----
From: Scott Wegener [mailto:(email redacted)]
Sent: Saturday, July 22, 2000 9:52 PM
To: Ray Ayala; MiataPower
Subject: Re: Anyone happen to know the wiring for replacement 4 wire O2
sensors? (LPC)



Only problem with that one is I'd have to wire it into the harness in order
to determine which was which on the O2 ground/signal line, no?
Any idea what the heater resistance should be? Have two wires that are
~10MegOhm resistance across, and the other two that are about 5MOhm...

Scott

----- Original Message -----
From: "Ray Ayala" <(email redacted)>
To: "MiataPower" <(email redacted)>
Sent: Saturday, July 22, 2000 11:15 PM
Subject: Re: Anyone happen to know the wiring for replacement 4 wire O2
sensors? (LPC)


>
> Those colors are different from both the OEM and the BW sensors I've
> seen. But you can find the heater wires with an ohmmeter before
> installation. It doesn't matter which one gets grounded. The sensor
wires
> look like an open circuit when the sensor is cold. Then when its hot,
look
> at the voltage across the other two wires with a DVM to see which one is
> negative (O2 ground).
>
> At 11:20 PM 07/22/2000 -0400, Scott Wegener wrote:
>
> >Subject about says it all. Looking at the wire end, have blue, black,
> >white, black. Somehow managed to misplace the diagram that came with the
> >sensor..I THINK it's:
> >blue - O2 'high'
> >1st black = O2 ground
> >white = heater power
> >2nd black = heater ground.
> >
> >This seem correct?
> >
> >Scott
>