Code 33 Driver Select Switch Input Error
CCR module monitors select switch for a valid combination of inputs. A valid combination of inputs exists when CCR module detects that only one select switch terminal is grounded and the other is open (ungrounded).
If CCR module detects an invalid combination of inputs for more than 3 seconds (both circuits are open, or both circuits are grounded), it records error (sets Code 33) and turns on select switch LEDs. CCR module then defaults to SOFT mode until a valid combination of switch inputs is detected.