Reference voltage is supplied to the memory switch from the driver door module (DDM). When a memory switch is pressed, reference voltage is applied through the switch contacts, a series of resistors and thorough the memory switch signal circuit to the DDM. The door module then sends a serial data message to the memory seat module (MSM) indicating the memory recall request. In response to the switch input, the MSM then commands the appropriate seat motors to move to the pre-recorded seat positions stored in memory.

The driver door module is referenced in Tech 2 as the Driver Door Switch.

Schematic Reference

Driver Seat Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Seats System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Verify that all manual power seat and lumbar functions operate when being controlled by the seat adjuster switch and lumbar switches.

⇒	If any seat or lumbar function does not operate, refer to Power Seat Inoperative or Lumbar Support Inoperative.

2. Verify that the memory recall personalization option is ON. Refer to the owners manual.
3. Verify that memory positions for driver 1 and driver 2 have been recorded to memory by observing the scan tool Driver Position Module, Memory Data 1 and Memory Data 2 parameters.

1. Ignition ON, verify the scan tool Memory Recall Switches parameter is approximately 2.74 volts while pressing the memory 1 switch.

⇒	If not the specified value, refer to the Memory Switch component test. If the switch tests normal, replace the driver door switch.

2. Verify the scan tool Memory Recall Switches parameter is approximately 1.78 volts while pressing the memory 2 switch.

⇒	If not the specified value, replace the memory/heated seat switch.

3. Verify the scan tool Memory Recall Switches parameter is approximately 0.96 volts while pressing the EXIT switch.

⇒	If not the specified value, replace the memory/heated seat switch.

4. If all circuits test normal, replace the MSM.

Memory Switch

1. Disconnect the X4 harness connector at driver door switch.
2. Test for infinite resistance between the signal circuit terminal 5 and the voltage reference circuit terminal 14.

⇒	If not the specified value, replace the memory/heated seat 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/heated seat switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.