O2 Diagram

Discuss topics related to the CA18DE and CA18DET series engines.
89'ClubK's
Posts: 244
Joined: Fri Mar 17, 2006 7:26 pm
Car: 89' Nissan 240SX

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Anybody have the complete diagram showing wiring from ECU to O2?Or what wires connect to what wires.thanks!
Modified by 89'ClubK's at 6:34 PM 8/29/2006


dattodude
Posts: 430
Joined: Wed Jun 29, 2005 2:51 am
Car: CA18DET Datsun 1200 B110 Sedan
Contact:

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The CA18 has a 3 wire heated 02 sensor.

Two of the wires are 'heater wires', the remaining wire will be the signal wire.

The heater wires will give a resistance between them (the heater element).

The remaining wire will be the signal wire.

So find the two wires that have a resistance between them, and put IGNITION 12v (with an extra fuse) through these to earth. The remaining pin connects to pin 29 on the ECU.

EDIT ps. The signal wire should be shielded wire (connected to ECU earth)all the way to the ECU. Especially if run next to other power wires.

89'ClubK's
Posts: 244
Joined: Fri Mar 17, 2006 7:26 pm
Car: 89' Nissan 240SX

Post

Thanks! But I really need a diagram a CA18 harness to KA O2.Even a site would help. I've search everywhere, and my printouts don't show the wires I speak of.


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