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[Kevin Wood]

Was doing some work on ORO's car over the weekend (MY2000 2.5 Elite auto estate) and discovered the auto gearbox ECU had P1844 present:

- "Ignition / Injection cutoff circuit High I/P"
In the live data this value was showing 87% IIRC.

In addition, in the engine ECU there were no faults present but in the live data it showed the transmission coding as "Manual" and also showed Number of cylinders"4".

The car had a faulty ABS/TC ECU at the time (IIRC, we'd actually removed it by the time we did some of the diagnosis).

Despite this, it appears to drive perfectly well.

Has anyone come across this or anything similar before? It could be a bizarre side-effect of ABS ECU failure, of course, but I'm wondering if it's a poor connection between engine ECU and autobox ECU or if one or other are incorrectly coded for the car? (seems to be no auto/manual coding available for the engine ECU so I guess it picks this up automatically?)

Kevin

[Kevin Wood]

Hmm. Looks to be a signal that is shared with the Engine ECU, ABS/TC ECU and Autobox ECU, so possible that the faulty ABS ECU was disrupting it, I guess. :-/

Kevin
 

[TheBoy]

the 4 cylinder thing is normal on v6 until the engine starts, then it should say 6cyl

[Kevin Wood]

the 4 cylinder thing is normal on v6 until the engine starts, then it should say 6cyl

Ahh, OK. Good to know. The Ignition/Injection cutoff is, I'm guessing, a signal from the ABS/TC so will see what happens when the ECU has been refurbed.

Kevin