GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Corvette 🢒 Body 🢒 Seats 🢒 Memory Seat Feature Inoperative

Diagnostic Aids

The memory seat module (MSM) is also known as the driver position module (DPM) for this vehicle.

Test Description

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

  1. Turning on the headlamps switch in this step eliminates the possibility of the memory function switch finding an alternate path to ground through the switch illumination circuit.

    2.

  2. This step tests the integrity of the memory 1 switch signal circuit of the driver door switch assembly (DDSA). If the fuse in the jumper wire opens when you perform this test, a short to battery voltage my have occurred.

    3.

  3. This step tests the integrity of the memory 2 switch signal circuit of the DDSA. If the fuse in the jumper wire opens when you perform this test, a short to battery voltage my have occurred.

Step

Action

Yes

No

Schematic Reference: Driver Seat Schematics

Connector End View Reference: Power Seat 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. Turn ON the headlamps switch.
  4. With a scan tool, observe the Memory Recall Switches parameter in the Driver Door Switch data list.
  5. Press the memory 1 button.

Does the scan tool display Memory 1?

Go to Step 4

Go to Step 6

4
  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 5

Go to Step 8

5
  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 13

Go to Step 11

6

  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 switch harness connector to a good ground.
  3. With a scan tool, observe the Memory Recall Switches parameter.

Does the scan tool display Memory 1?

Go to Step 7

Go to Step 9

7
  1. Connect a 3-amp fused jumper wire between the memory 1 switch signal circuit of the 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 11

Go to Step 14

8

  1. Disconnect the memory function switch harness connector.
  2. Connect a 3-amp fused jumper wire between the memory 2 switch signal circuit of the switch connector and the ground circuit of the switch connector.
  3. With a scan tool, observe the Memory Recall Switches parameter.

Does the scan tool display Memory 2?

Go to Step 11

Go to Step 10

9

Test the memory 1 switch signal circuit between the memory function switch and the driver door switch assembly (DDSA) for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 12

10

Test the memory 2 switch signal circuit between the memory function switch and the DDSA for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 12

11

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 18

Go to Step 15

12

Inspect for poor connections at the harness connector of the DDSA. 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 18

Go to Step 16

13

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 18

Go to Step 17

14

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 18

--

15

Replace the memory function switch. Refer to Driver Seat Adjuster Memory Switch Replacement .

Did you complete the replacement?

Go to Step 18

--

16

Replace the DDSA. Refer to Driver Door Latch Release, Power Window and Power Mirror Switch, and Bezel Replacement in Doors.

Did you complete the replacement?

Go to Step 18

--

17

Replace the MSM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 18

--

18

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2