M4 lost aux 1 please help! racing this weekend

[mr2daj]

Hi, i hope somene can help me. I was doing a test day today and the car started to overboost. tried trimming out some boost but that didn't help. blew the gearbox in the end but that's another problem altogether! I have a race next week and the car is going back to the dyno tomorrow.

On further investigation I am getting nothing from aux 1 that i am using for boost control. I checked and have 12v at the solenoid and continuity to the pin on the ecu for the switched earth on pin 13. all i can assume is that the driver may be dead in the ecu. I removed the ecu and took the board from the case looking for the possibility of an internal fuse but found nothing obvious.

Can anyone help. can the offending part be replaced. Is there anything else I can look for?

[mr2daj]

failed mosfet?

think this is the 1.... http://uk.rs-online.com/web/p/products/6868518/

[mr2daj]

Can I just use 1 of the other aux ports? I know the others are for 0.6 amps but is that enough for a boost control solenoid? If.it is I have some spares

[stevieturbo]

Can I just use 1 of the other aux ports? I know the others are for 0.6 amps but is that enough for a boost control solenoid? If.it is I have some spares

That would be fine, boost solenoids draw very little.