KA24DE: ECU Open loop

May 06


Something I picked up from the manual…

*** Note: On 240sx, OBD 1 is easily identifiable since it will have 2 oxygen sensors instead of 3 as OBD 2 system uses. ***

Here is some things that will not cause open loop on your KA24DE OBD1 ECU (years ’90-early ’95):

-IAT sensor (diagnostic item only)

-Rear heated o2 sensor (near cat)

-EGR -> BPT also doesn’t cause open loop

-Disconnection of airbags does not cause open loop (use your brain here to decide what you think is good for you or not – don’t clutter with debates please)

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