B1591

CIRCUIT DESCRIPTION
The LH mirror and the RH mirror vertical position sensors are potentiometers. The Driver Door Module (DDM) and the Passenger Door Module (PFDM) determine the vertical position of the mirrors based on the signal voltage from these sensors.

CONDITIONS FOR RUNNING THE DTC




The DDM and the PFDM must be powered up.

CONDITIONS FOR SETTING THE DTC
The code will be set when the signal voltage of the mirror vertical position sensor is above or below the range limits (within 10%) for 30 seconds in the requested position. The voltage range limits depend upon what the actual voltage of the 5 volt reference circuit is, and will vary from vehicle to vehicle and from module to module. Use the table below to determine what the failed voltage range limits are for your particular vehicle/module.

ACTION TAKEN WHEN THE DTC SETS
Mirror vertical memory movements are disabled.

Manual movements are not disabled.

CONDITIONS FOR CLEARING THE DTC
When the door modules no longer sense the failure.

DIAGNOSTIC AIDS
^ After readjusting the mirror positions, be sure to reset the mirror memory switch to the new positions.
^ If this DTC is set as a history DTC, but not as a current DTC, remove the fuse for the door module that set the DTC for 10 seconds, then reinstall it.

TEST

Steps 1-3:

Steps 4-10: