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HOMESERVICE MANUALSBUICK2005LESABRE LIMITED, 4T65E/M15REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTSEATSSEAT SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESMEMORY SEAT FEATURE INOPERATIVETEST DESCRIPTION
2005 Buick LeSabre Limited, 4T65E/M15

Test Description

2005 Buick LeSabre Limited, 4T65E/M15SECTION Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 3:  This step verifies that the personalization option is active.
  2. 4:  Turning ON the headlamps switch in this step eliminates the possibility of the memory function switch finding an alternative path to ground through the illumination circuit.
  3. 7:  If the fuse in the jumper wire opens when you perform this test, the signal circuit is shorted to battery voltage.
  4. 9:  If the fuse in the jumper wire opens when you perform this test, the signal circuit is shorted to battery voltage.
Memory Seat Feature Inoperative

Step Action Yes No
Schematic Reference: Driver Seat Schematics 
Connector End View Reference: Power Seat Systems Connector End Views  or Power Door Systems Connector End Views
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2 Verify that the Memory Seat Feature Inoperative complaint is present.
Does the memory seat system operate as described in the system description and operation?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, navigate to the Setting Options screen by making the following selections:
    • Dash Integration Module
    • Special Functions
    • Set Options
    • Personalization Option
  4. Follow the on-screen instructions to verify that the Personalization Option is activated.
Is the personalization option activated?		 Go to Step 4  Go to Control Module References in Computer/Integrating Systems for replacement, setup, and programming
4 
  1. Turn ON the headlamps switch.
  2. With a scan tool, observe the Memory Recall Switches parameter in the driver door module (DDM) data list.
  3. Press the memory 1 button.
Does the scan tool display Memory 1?		 Go to Step 5  Go to Step 7 
5
  1. With a scan tool, observe the Memory Recall Switches parameter.
  2. Press the memory 2 button.
Does the scan tool display Memory 2?		 Go to Step 6  Go to Step 9 
6
  1. With a scan tool, observe the Memory Recall Switches parameter.
  2. Press the Exit button.
Does the scan tool display Exit?		 Go to Step 14  Go to Step 13 
7 
  1. Disconnect the memory function switch harness connector.
  2. Connect a 3-amp fused jumper wire from the memory 1 switch signal circuit of the memory function switch connector to ground.
  3. With a scan tool, observe the Memory Recall Switches parameter.
Does the scan tool display Memory 1?		 Go to Step 8  Go to Step 10 
8
  1. Connect a 3-amp fused jumper wire between the memory 1 switch signal circuit of the memory function switch connector and the ground circuit of the switch connector.
  2. With a scan tool, observe the Memory Recall Switches parameter.
Does the scan tool display Memory 1?		 Go to Step 13  Go to Step 15 
9 
  1. Connect a 3-amp fused jumper wire from the memory 2 switch signal circuit of the memory function switch connector to ground.
  2. With a scan tool, observe the Memory Recall Switches parameter.
Does the scan tool display Memory 2?		 Go to Step 13  Go to Step 11 
10 Test the memory 1 switch signal circuit between the memory function switch and the driver door switch assembly for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 19  Go to Step 12 
11 Test the memory 2 switch signal circuit between the memory function switch and the driver door switch assembly for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 19  Go to Step 12 
12 Inspect for poor connections at the harness connector of the driver door switch assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 19  Go to Step 16 
13 Inspect for poor connections at the harness connector of the memory function switch. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 19  Go to Step 17 
14 Inspect for poor connections at the harness connector of the memory seat module (MSM). Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 19  Go to Step 18 
15 Repair the open in the ground circuit of the memory function switch. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 19  -
16 Replace the driver door switch assembly. Refer to Front Door Switch Replacement in Doors.
Did you complete the replacement?		 Go to Step 19  -
17 Replace the memory function switch. Refer to Memory Seat Switch Replacement .
Did you complete the replacement?		 Go to Step 19  -
18 Replace the MSM. Refer to Memory Seat Control Module Replacement  in Computer/Integrating Systems for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 19  -
19 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.