GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 Terraza Ext. 🢒 Body 🢒 Seats 🢒 Memory Seat Feature Inoperative

Test Description

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

  1. If the fuse in the jumper wire opens when you perform this test, the signal circuit is shorted to ground.

    2.

  2. If the fuse in the jumper wire opens when you perform this test, the signal circuit is shorted to ground.

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. With a scan tool, observe the Memory Switch parameter.
  2. 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 Switch 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 Switch parameter.
  2. Press the Exit button.

Does the scan tool display Exit?

Go to Step 12

Go to Step 11

6

Connect a test lamp from the battery positive voltage circuit of the memory function switch to a good ground.

Dose the test lamp illuminate?

Go to Step 7

Go to Step 13

7

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

Does the scan tool display Memory 1?

Go to Step 11

Go to Step 9

8

  1. Disconnect the memory function switch harness connector.
  2. Connect a 3-amp fused jumper wire between the battery positive voltage circuit of the switch harness connector and the memory 2 switch signal circuit of the switch harness connector.
  3. With a scan tool, observe the Memory Switch 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 memory seat module (MSM) for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 12

10

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

Did you find and correct the condition?

Go to Step 16

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 16

Go to Step 14

12

Inspect for poor connections at the harness connector of the 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 16

Go to Step 15

13

Repair the open in the battery positive voltage circuit of the memory function switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

--

14

Replace the memory function switch.

Did you complete the replacement?

Go to Step 16

--

15

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 16

--

16

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2