L/H Mirror is controlled by pressing direction switch (UP, DOWN, LEFT, RIGHT) with IG ON after L/H Mirror is selected by Power Window Main Switch.
The DDM(Drive Door Module) diagnoses its system for detecting an error in the horizontal motor and circuit of outside mirror at the driving seat side. And if the DDM doesn't get any signals from a left/right horizontal sensor in outside mirror at the driving seat side, the DDM sets DTC B191000 "Outside Mirror-Left horizontal motor or sensor error".
Item
Detecting Condition
Possible Cause
DTC Strategy
Current Detection at Horizontal Driving Motor IC in Driver Mirror
Short to ground in Horizontal Driving motor circuit
Faulty Driving Motor
Faulty DDM
Enable Conditions
Not in START position with IGN Key
Motor works on
Threshold Value
If the sensor's signal doesn't change while a mirror is operating
If the sensor's signal shows an opposite direction while a mirror is operating
Diagnostic Time
Immediately (DTC status memorized)
DTC Erasing Time
DTC is erased immediately after trouble fixed
Fig.1) A signal waveform of the outside mirror horizontal motor/sensor at the driving seat side - Voltage at the maximum operation to right (Approx. 3.9V)
Fig.2) A signal waveform of the outside mirror horizontal motor/sensor at the driving seat side - Voltage at the maximum operation to left (Approx. 0.8V)