f-28 is a serial communication error. either your main cntrl or motor control is going to be bad. hard to say which one without a multi meter and the machine in front of me though.
I've got my multimeter and my machine in front of me, and my machine giving me that pesky F-28 error code.
Upon testing the drive motor, ohmmeter readings:
Pins 1 and 2: 118 ohm (supposed to be approx 6 ohm)
Pins 2 and 3: infinite (supposed to be approx 6 ohm)
Pins 1 and 3: infinite (supposed to be approx 6 ohm)
For sh*ts & giggles, I tested the door lock switch on connector DL3, with following results:
Pins 2 and 3: 48 ohms (supposed to be 60 ohms)
Pins 1 and 3: 103 ohms (supposed to be 60 ohms)
From this information can it be determined with certainty what my problem is?