Hello, I'm playing with this little 2009 Miles truck that I just picked up from the auction with just 1200 miles on the odometer.
It came complete with no evidence of someone tampering with it, however I cannot get it moving.
The 6 Powersonic 12V 150Ah batteries were all low at 1.5-2V each, however after taking them off and charging them on 6 regular car 6A chargers for 72 hours, the pack seems to have come back to life, and now when reinstalled shows 78V. I doubt they will last but at least should move the car around the yard for a bit.
The problem is, the Curtis 1238-6501 controller blinks out error code 52.
After removing the 35-pin connector and spraying it with electrical cleaner, the Curtis came back to life a few times - the LED was flashing yellow, indicating normal operation, and the main contactor would loudly close, providing 78V between the B+ and B-. The car still won't move though. I verified the TPS was good, as the voltage gradually raises between 0.2-4V while I'm pressing on it. The "D" and "R" indicators light up on the cluster as I flip the forward/reverse switch. The voltage for D and R signals comes to the controller as well.
However I was only lucky for half a day, and now I'm unable to turn it on at all. It just keeps blinking the code 52. I thought of a bad connection in the connector, but wiggling and spraying does not help anymore. All pins are good.
According to the Curtis manual, code 52 is a OEM (Miles) spec code, and the only info I found online is that it means "open coil on main contactor or broken wire".
From what I read online, almost everything breaks on these trucks. What would be my next step in troubleshooting the thing?