• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category |
Battery positive voltage is supplied to the memory function switch from the driver door switch (DDS). When a memory switch is pressed, battery voltage is applied through the switch contacts, a series of resistors, and thorough the memory switch signal circuit to the DDS. The door control module then sends a message via the GMLAN serial data line to the memory seat module (MSM) indicating the memory recall request. The MSM then commands the appropriate seat motors to move to the pre-recorded seat positions stored in memory in response to the switch input.
Power Seat Connector End Views
⇒ | If the parameter does not change state, perform the Memory Switch component test. If the switch tests normal, replace the driver door switch. |
⇒ | If the parameter does not change state, replace the memory switch. |
⇒ | If the parameter does not change state, replace the memory switch. |
⇒ | If not infinite, replace the memory switch. |
⇒ | If the resistance is not within the specified range, replace the memory switch. |
Switch Position | Resistance |
---|---|
Idle | Infinite |
Memory 1 | 2.03K-2.49K ohms |
Memory 2 | 3.83K-4.69K ohms |
Exit | 9.32K-10.18K ohms |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for MSM of DDS replacement, programming, and setup. |