Circuit Description
The memory mirror module (MMM) receives inputs from the power mirror switch. The mirror select switch must be in either the left or the right position in order to operate the power mirror switch. The mirror switch is then operated in order to move one of the mirrors. When the mirror switch is operated, more than one input is sent from the power mirror switch to the MMM. If the MMM recognizes the input combination, the MMM moves the appropriate mirror in the requested direction. If the MMM does not recognize the input combination as a valid input, the MMM ignores that combination and does not move the mirrors.
Conditions for Setting the DTC
| • | The DTC will set only if DTC B1982 or B1983 is not current. |
| • | When the mirror right switch is active for 30 seconds after motion has ceased, the switch is considered shorted and the MMM will set DTC B2143. |
Action Taken When the DTC Sets
| • | The motor outputs being driven in response to the suspect switch are deactivated. |
| • | The MMM continues responding to valid inputs from the other positioning switches. |
| • | All of the memory recall commands are ignored. |
Conditions for Clearing the DTC
| • | The MMM does not detect the switch failure during the last monitoring cycle. |
| • | A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present. |
| • | Use a scan tool. |
Diagnostic Aids
- Clear the DTCs and cycle the ignition.
- If the DTC resets, replace the power mirror switch.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
Perform the Power Door Systems Diagnostic System Check
-
This step tests for a faulty outside rear view mirror switch.
-
Clear all of the DTCs following the completion of the repair procedure.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Did you perform the Power Door Systems Diagnostic System Check? | -- | Go to Step 2 | ||
After 30 seconds, does the DTC reset? | -- | Go to Step 3 | ||
3 | Replace the outside rear view mirror switch. Refer to Front Side Door Window Switch Replacement . Is the repair complete? | -- | Go to Step 4 | -- |
Are all of the DTCs cleared? | -- | -- |
