GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Memory Seats Schematics

1

Did you perform the power seat diagnostic system check?

Go to Step 2

Go to Diagnostic System Check - Power Seat Systems

2

Perform memory recall for driver 1 and driver 2.

Does the system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Operate the driver power seat switches in all directions.

Does the system operate normally?

Go to Step 4

Go to Power Seat Inoperative

4

Connect a test lamp to a good ground, and back probe the battery voltage supply of the memory seat module, at the harness connector of the memory seat module.

Does the test lamp illuminate?

Go to Step 5

Go to Step 15

5

Connect the test lamp to a battery positive voltage supply circuit, and back probe the ground circuit of the memory seat module at the harness connector of the memory seat module.

Does the test lamp illuminate?

Go to Step 6

Go to Step 16

6

With a test lamp connected to a battery positive, back probe the ground circuit of the memory seat switch, at the harness connector of the memory seat switch.

Does the test lamp illuminate?

Go to Step 7

Go to Step 17

7

  1. Disconnect the memory seat switch from the memory seat module.
  2. With the test lamp connected to battery positive, back probe the memory seat recall 1 circuit, at the harness connector of the memory seat switch.
  3. Operate the memory recall 1 switch.

Does the test lamp illuminate?

Go to Step 8

Go to Step 10

8

  1. With the test lamp connected to battery positive, back probe the memory recall 2 circuit at the harness connector of the memory seat switch.
  2. Operate the memory recall 2 switch.

Does the test lamp illuminate?

Go to Step  9

Go to Step 11

9

  1. With the test lamp connected to battery positive, back probe the memory set circuit at the harness connector of the memory seat switch.
  2. Operate the memory set switch.

Does the test lamp illuminate?

Go to Step 14

Go to Step 12

10

Test the memory recall 1 seat switch signal circuit for an open or short to volt. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 13

11

Test the memory recall 2 seat switch signal circuit for an open or short to volt. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 13

12

Test the memory seat set switch circuit for an open or short to volt. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 13

13

Inspect for poor connections at the harness connector of the memory seat switch. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 18

14

Inspect for poor connections at the harness connector of the memory seat module. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 19

15

Repair the open or short to ground in the battery positive voltage supply circuit of the memory seat module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

did you find and correct the condition?

Go to Step 20

--

16

Repair the ground circuit of the memory seat module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

did you find and correct the condition?

Go to Step 20

--

17

Repair the ground circuit of the memory seat switch

did you find and correct the condition?

Go to Step 20

--

18

Replace the memory seat switch.

Did you complete the replacement?

Go to Step 20

--

19

Replace the memory seat module. Refer to Memory Seat Control Module Replacement .

Did you complete the replacement?

Go to Step 20

--

20

Operate the memory seat system to verify the repair.

Did you correct the condition?

System OK

Go to Step 2