Test D: The Memory Mirror Is Inoperative
PINPOINT TEST D: THE MEMORY MIRROR IS INOPERATIVENormal Operation
Under normal operation, the exterior mirror control switch receives power from circuit SBP15 (WH/RD) and ground from circuit GD126 (BK/WH). The exterior mirror control switch uses circuits CPM16 (BN/BU), CPM17 (BU/GN), CPM20 (BN/WH), CPM21 (YE/VT) and CPM23 (GY) to send input signals to the driver door module (DDM). The DDM controls the LH exterior mirror motor movement by supplying the appropriate power and ground to circuits CPM26 (WH), CPM27 (GY/BU), CPM28 (BU/BN) and CPM29 (GN). The DDM communicates with the driver seat module (DSM) through the medium-speed controller area network (MS-CAN) whenever the DDM receives an input signal from the exterior mirror control switch for the RH mirror. The DSM controls the RH exterior mirror motor movement by supplying the appropriate power and ground to circuits CPM31 (YE/GY), CPM32 (WH/BU), CPM33 (WH/VT) and CPM34 (WH/BN).
The memory mirror system uses feedback potentiometers, located in the LH and RH exterior mirrors, in order to track the movement of the LH and RH exterior mirror motors. The DDM supplies the LH exterior mirror feedback potentiometer reference voltage through circuit LPM30 (GY/VT) and ground through circuit RPM30 (YE). The DSM supplies the RH exterior mirror feedback potentiometer reference voltage through circuit LPM30 (GY/VT) and ground through circuit RPM30 (YE). The DDM receives feedback from the LH exterior mirror feedback potentiometer through left/right circuit VPM35 (YE/BU) and up/down circuit VPM36 (BN/YE). The DSM receives feedback from the RH exterior mirror feedback potentiometer through left/right circuit VPM37 (BU/OG) and up/down circuit VPM38 (BN/GN).
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- DDM
- DSM
- Exterior mirror motor
- Exterior mirror
- Exterior mirror control switch
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D23 Continued:
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