Circuit Description
The memory mirror module (MMM) receives inputs from the Memory Exit switch. When the Memory Exit switch is operated, the switch grounds and the MMM recognizes the input. The MMM performs the action requested and sends a class 2 message to the memory seat module (MSM). The MSM then performs the action requested.
Conditions for Setting the DTC
The MMM sets the appropriate DTC any time the MMM detects a switch failure.
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 the On-Board Clearing DTCs feature. |
| • | Use a scan tool. |
Diagnostic Aids
This diagnostic determines if the switch is stuck or if the input wiring to the memory mirror module (MMM) has a short to ground. If CKT 612 (BLK) has a short to ground, the DTC will set again. If the switch is stuck, the DTC will not set again with the memory function switch disconnected.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
Perform the Power Door Systems Diagnostic System Check
-
This step determines if the malfunction is in CKT 612 (BLK) or in the memory function switch.
-
Clear all of the DTCs after the repair procedure is complete.
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 | Go to Step 4 | |
3 | Repair the short to ground in CKT 612 (BLK). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 5 | -- |
4 | Replace the memory function switch. Is the repair complete? | -- | Go to Step 5 | -- |
Are all of the DTCs cleared? | -- | -- |
