B2287

CIRCUIT DESCRIPTION
The driver door module (DDM) and the passenger door module (PDM) receive vertical and horizontal position signals from the mirrors. These signals are used by the DDM and PDM for memory recall functions to determine the vertical and horizontal positions of the mirrors. The DDM and PDM command the mirror memory settings based on the voltage level they receive back from the position sensors. Each door module provides a 5 volt supply, a signal, and a ground circuit to the sensors. The sensors are variable resistors that the DDM and PDM monitor the voltage level across. When a memory setting is recalled, the DDM and PDM command the mirror motors in the appropriate direction until the position sensors are within the voltage range stored in memory. The DDM and PDM monitor the mirror position sensors 5 volt supply circuits to determine if the voltage level received is out of range. If the DDM or PDM detects a voltage level out of range for greater than 2 seconds, a DTC is set.

CONDITIONS FOR SETTING THE DTC
^ The DDM or PDM detects a mirror vertical or horizontal position sensor supply voltage range under 4.0 volts or over 5.2 volts.
^ Condition must be present for 2 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ Stores a history DTC B2286 or B2287 in DDM or PDM memory.
^ These DTCs can only be set as a history code even if the malfunction is current.
^ No driver warning message will be displayed for this DTC.

CONDITIONS FOR CLEARING THE DTC
^ The DDM or PDM detects the mirror vertical and horizontal position sensor supply voltage range between 4.0-5.2 volts for greater than 2 seconds, and:
^ The DTC is cleared using the IPC clearing feature, or
^ The DTC is cleared using a scan tool.

DIAGNOSTIC AIDS
^ The following conditions may cause an intermittent malfunction:
- There is an intermittent short to ground or voltage in a mirror position sensor reference circuit.
- There is an intermittent short to voltage in a mirror position sensor signal circuit.
- A mirror vertical or horizontal sensor is shorted internally.
^ If the DTC does not reset after the code is cleared, then the problem may be intermittent . Refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.

TEST DESCRIPTION

Steps 1-2:

Steps 3-13:

The numbers below refer to the step numbers on the diagnostic table.
2. This tests the mirror position sensor reference voltage using a scan tool. Normal reference voltage range is between 4.0-5.2 volts.
3. This test determines whether the mirror position sensor is shorted internally using a scan tool with the mirror disconnected. Reference voltage with the mirror disconnected is approximately 5.0 volts.
4. This tests for a short to ground in the mirror position sensor reference circuit.
5. This test determines whether the mirror position sensor reference circuit or the mirror position sensor signal circuit is short to voltage. Reference voltage with the mirror position sensor reference circuit short to voltage is B+.