M35 Electrical gremlin
Hey guys,
I have quizzed a few of the facbook users in the M35 tuners group about this issue, but thought it might also be a good idea to see if anyone on here has any ideas that havent been thought of yet.
For the better part of six weeks now, i have an issue with the car whenever it sits unoccupied in the sun (like carparks when shopping, or in full sun at work). The car shows on the dash firstly the AT light, and also drops out the speedo and gear selection on the dash. Then once the ABS decided s to do it little venting test on start up, it seems to hold the "vent" open for about 20-30 seconds, the the light stays on.
I have been in a few positions when i have had to move the car with the issue present, and without jumping on the breaks, there dosn't appear to be any major noticeable issue with the breaking, but the trans is clearly unhappy. It slams pretty hard from N to D and it holds the gears a lot longer then it normally would.
Then, once the windows are down and the cabin of the car cools down, slowly the AT will go back to normal then shortly after the ABS light will switch off.
Also, to test the theory, i had parked the car in full sun yesterday (about 30 degrees) and cranked it over at about 4pm, sure enough the issue occurred. i then moved the car to the shade, left it with windows down for an hour, then fired it up again, no issues present.
I had read on here that a faulty atessa ecu had caused ABS issues in the past, but there was no mention of faulty gauges with that. And also from what i have been told, the gauges are controlled by the iPDM, but that should not have any temp change in cabin as next to the battery.
I have a new iPDM, BCM & ABS ecu coming from Josh, and will try those but does anyone else have any thoughts or had similar issues?