Circuit Description
The LH Front Power Window Switch receives an input from the memory function switch memory exit switch through a simultaneous memory 1 and memory 2 input when the button is pressed. The LH Front Power Window Switch recognizes the input and sends a message on the Simple Bus Interface (SBI) to the LH Front Door Module (LFDM) indicating that the memory exit button has been pressed. The LFDM then sends a message via the Class 2 Serial Data Line to the Memory Seat Module (MSM), the Steering Column Tilt/Telescoping Module (TTM), and the Radio (IRC) indicating that the memory exit button has been pressed.
Conditions for Setting the DTC
| • | When the memory exit switch is active for 30 seconds continuously, the switch will be considered shorted and the DTC will set. |
| • | DTC B2242 will set only if DTC B1982 DDM or DTC B1983 DDM is not current. |
Action Taken When the DTC Sets
| • | The LFDM will no longer respond to memory exit switch inputs. |
| • | Because the memory exit button is an input on the memory 1 and memory 2 inputs to the LFDM, the memory 1 and memory 2 functions will no longer operate. |
| • | The LFDM will continue to respond to valid inputs from the other memory function switches. |
Conditions for Clearing the DTC
| • | The LFDM sees that the memory exit switch is no longer active. |
| • | Use the On-Boards clearing DTCs feature. |
| • | Use a scan tool. |
Test Description
The numbers below refer to the step numbers on the diagnostic table:
-
Perform the Power Door Diagnostic System Check System Check before continuing with the diagnosis of this DTC.
-
Clear all DTCs and cycle ignition to check that the DTC did not falsely set.
-
Clear all DTCs after the repair procedure is complete.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Was the Door Systems Diagnostic System Check performed? | -- | Go to Step 2 | ||
After the 30 seconds, does the DTC reset? | -- | Go to Step 3 | ||
3 | Replace the memory function switch. Refer to Front Door Switch Replacement . Did you complete the replacement? | -- | Go to Step 4 | -- |
Are all DTCs cleared? | -- | -- |
