Memory Seat Feature Inoperative
Memory Seat Feature Inoperative
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
Reference voltage is supplied to the memory switch from the driver door module (DDM). 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 DDM. The door module then sends a serial data message 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.
Diagnostic Aids
The DDM is referenced in Tech 2 as the Driver Door Switch.
Reference Information
Schematic Reference
Driver Seat Schematics Driver Seat Schematics
Connector End View Reference
Component Connector End Views Connector Views
Description and Operation
Memory Seats Description and Operation Memory Seats
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Verify that all manual power seat and lumbar functions operate as described in the description and operation. Refer to Power Seat Inoperative (Without Memory A45) Power Seat Inoperative (Without Memory A45)Power Seat Inoperative (Coupe with Memory A45) Power Seat Inoperative (Coupe with Memory A45)Power Seat Inoperative (Sedan, Wagon with Memory A45) Power Seat Inoperative (Sedan, Wagon with Memory A45) or Lumbar Support Inoperative (Without Memory A45) Lumbar Support Inoperative (Without Memory A45)Lumbar Support Inoperative (With Memory A45) Lumbar Support Inoperative (With Memory A45).
2. The memory seat module (MSM) cannot perform Memory Seat Recall, Easy Exit Setup, or Easy Exit Recall functions unless these options are activated in the driver information center (DIC). Refer to the Owners Manual to verify that these memory recall personalization options are ON.
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.
Circuit/System Testing
1. Ignition ON, verify the scan tool Driver Door Switch Memory Recall Switches parameter is approximately 2.75 volts while pressing the memory 1 switch.
• If not the specified value, perform the Memory Switch component test. If the switch tests normal, replace the driver door module.
2. Verify the scan tool Memory Recall Switches parameter is approximately 1.75 volts while pressing the memory 2 switch.
• If not the specified value, replace the memory seat adjuster switch.
3. Verify the scan tool Memory Recall Switch parameter is approximately 1.0 volt while pressing the EXIT switch.
• If not the specified value, replace the memory seat adjuster switch.
4. If all circuits test normal, replace the MSM.
Component Testing
Memory Switch
1. Disconnect the X4 harness connector at the DDM.
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 seat adjuster switch.
3. Test the resistance between terminal 5 and terminal 14 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 seat adjuster switch.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Driver Seat Adjuster Memory Switch Replacement Service and Repair
* Control Module References Control Module References for MSM and DDM replacement, setup, and programming