Seats
DTC 033
CIRCUIT DESCRIPTION
The mobility seat module uses inputs from 4 limit switches in order to determine the seat position. The limit switch signal circuits are referenced from battery voltage within the module. The limit switches will open or close the switch signal circuits to ground in order for the module to determine them to be active or inactive. The swivel in limit switch signal circuit is considered to be active when the circuit reference voltage is high or open to ground by the switch. The mobility seat module also monitors an input from a hall effect sensor in the rotation motor while the seat is being rotated in or out. The hall effect is a 12-volt 3-wire sensor and the signal circuit is referenced from battery voltage within the module.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC 033 Swivel In Limit Switch Becomes Active Before Rotation In Is Complete
CONDITIONS FOR RUNNING THE DTC
- Battery voltage must be within 9-16 volts.
- Seat operation is attempted from the outward facing position.
CONDITIONS FOR SETTING THE DTC
When rotating the seat to the forward facing position the swivel in limit switch becomes active before the hall effect sensor input indicates that the seat has rotated to the full forward facing position.
ACTION TAKEN WHEN THE DTC SETS
While the fault is current the module will not allow the seat to be extended outward but will allow rotation inward to the forward facing position.
CONDITIONS FOR CLEARING THE DTC
The DTC may be cleared by removing the main power supply or ground from the seat module.
DIAGNOSTIC AIDS
Inspect the limit switch for any physical damage or obstructions to its mechanical operation which may cause the condition.
TEST
