Circuit Description
The memory seat module (MSM) receives inputs from the LH seat switch. When you operate a switch, the switch grounds. The MSM recognizes the input. The MSM then moves the seat in the appropriate direction. When any seat positioning switch continues to activate for 30 seconds after motion stops in the direction requested, the system considers the switch shorted. The system also considers a switch shorted under the following conditions:
| • | A seat position sensor DTC is currently set. |
| • | A switch in the direction of the faulty sensor is active for over 30 seconds. |
Conditions for Setting the DTC
The MSM sets the appropriate DTC any time the MSM detects a switch failure.
Action Taken When the DTC Sets
| • | Motor outputs driven in response to the faulty switch deactivate. |
| • | The MSM continues to respond to valid inputs from all other positioning switches. |
| • | The MSM ignores all memory recall commands. |
Conditions for Clearing the DTC
The DTC clears when the MSM does not detect the switch failure for the last monitoring cycle.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Power Seat Systems Diagnostic System Check? | -- | Go to Step 2 | |
Does the DTC set again? | -- | Go to Step 3 | Go to Step 4 | |
3 | Repair the short to ground in CKT 276 (LT GRN). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 5 | -- |
4 | Replace the LH seat switch. Refer to Power Seat Switch Replacement . Did you complete the repair? | -- | Go to Step 5 | -- |
5 |
Did you clear the DTCs and perform the Power Seat Systems Diagnostic System Check? | -- | System OK | -- |
