Test D

PINPOINT TEST D: THE MEMORY MIRROR IS INOPERATIVE

Test D1-D3:

Test D3-D6:

Test D6-D7:

Test D8:

Normal Operation
The driver door module (DDM) sends voltage reference (VREF) to the memory set switch on circuits 8-AH32 (WH/BU), 8-AH31 (WH/RD) and 8-AH27 (WH). When memory set switch button 1 or 2 is pressed (within 5 seconds of pressing memory set button 3), the VREF on the circuits to the pressed buttons will be grounded and will drop to zero, providing inputs to the DDM. Once the DDM receives the inputs from memory set button 3; then 1 (or 2), the DDM will save current mirror settings using the inputs from the exterior mirror position sensors. When the DDM receives an input from the memory set switch button 1, circuit 8-AH31 (WH/RD) or button 2, circuit 8-AH32 (WH/BU) the DDM will adjust the driver mirror accordingly and will send a signal to the FEM over the SCP communication link to adjust the passenger mirror as per the memory set switch button.

The DDM receives inputs on the position of the LH exterior mirror from circuits 8-AD18 (WH/BK), 7-AD18 (YE/BK), 10-AD18 (GY/BK) and 9-AD18 (BN/YE) while the FEM receives inputs on the RH exterior mirror from circuits 8-AD19 (WH/RD), 7-AD19 (YE/RD), 10-AD19 (GY/RD) and 9-AD19 (BN/RD).

Possible Causes
- circuit 31-AH27 (BK) open
- circuits 8-AH32 (WH/BU), 8-AH31 (WH/RD), 8-AH27 (WH) open or shorted to ground
- DDM
- memory set switch