Hello everyone

Currently tracing a fault where my rotary gear selector is not dropping on engine shut down. Have tried a few units and same issue, it rises fine, but does not drop again, yet allows selection.

Manual says the code is a mismatch between GSM and TCM information so looking at why this is the case. Started as intermittent, now registering as permanent.

I have both an IID and Lynx Evo tool and looks like I am getting a 12v signal in GSM when I am reading live values when selector is in N, but not in P. Service manual says this should be 12v in P, and 0V in N,D,S.

Otherwise car is driving fine, aside from an odd 2 days where would not start, but that could have been a semi flat battery.

Next job is checking all wiring, but wondering if anyone had come across this before?

Sorry, I have no first-hand experience of this.

However, I wondered if it would be worth checking the wiring from the transmission to the rotary selector, specifically the circuit which carries the Park signal.



Could you maybe check the continuity between the green & white wire at pin 10 on the connector that plugs into the underside of the rotary selector (C3521) back to pin 13 on the C2365 connector (its mate C2366 shown in photo below, to aid identification)

Click image to enlarge

that's great thanks Phil, I've spent the morning on the same wiring diagram planning the weekend activities!

quick question.....where is C2365 physically located, the graph suggests somewhere around centre console?

Also is C2409 one of the three in the drivers side behind trim in the footwell?

No idea, I’m afraid.

However, if you can test continuity directly between pin 1 on the transmission connector



and pin 10 on the rotary selector connector then you’ll automatically check all the connectors at the same time and avoid having to identify them
(unless it fails the test, of course )

Phil