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.

Schematic Reference

Driver Seat Schematics

Connector End View Reference

Power Seat Connector End Views

Electrical Information Reference

DTC Type Reference

DTC Symptom Description

Scan Tool Reference

1. Ignition ON, verify the scan tool Driver Door Switch Memory Recall Switches parameter changes state while pressing the memory 1 switch.

⇒	If the parameter does not change state, perform the Memory Switch component test. If the switch tests normal, replace the driver door switch.

2. Verify the scan tool Memory Recall Switches parameter changes state while pressing the memory 2 switch.

⇒	If the parameter does not change state, replace the memory switch.

3. Verify the scan tool Memory Recall Switches parameter changes state while pressing the EXIT switch.

⇒	If the parameter does not change state, replace the memory switch.

4. If all circuits test normal, replace the memory seat module.

Memory Switch

1. Disconnect the (C4) harness connector at driver door switch.
2. Test for infinite resistance between the memory switch signal circuit terminal 5 and the switch supply voltage circuit terminal 14.

⇒	If not infinite, replace the memory switch.

3. Test the resistance between terminal 14 and terminal 5 while pressing the memory 1, memory 2, and EXIT buttons. Compare the resistance readings to the values in the Memory Switch Values table below.

⇒	If the resistance is not within the specified range, replace the memory switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.