GM Service Manual Online
For 1990-2009 cars only

Diagnostic Aids

Use the scan tool data display feature in order to view the switch input status to the memory seat module. Determine if the memory seat module is able to correctly interpret all of the memory and adjuster switches while active and inactive. Physically test continuity through the switch assembly in order to determine if the failure is an open or short in the switch assembly or a memory seat module internal fault.

Step

Action

Yes

No

Schematic Reference: Memory Seats Schematics

DEFINITION: One or more or the memory seat functions are inoperative and no DTCs are set.

1

Did you perform the Power Seats Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Power Seat Systems

2

Install a scan tool and display the memory seat module data list.

Are any of the seat adjuster or memory switches always active?

Go to Step 3

Go to Step 4

3

Disconnect the seat adjuster switch connector at the memory seat module.

Are any of the seat adjuster or memory switches always active?

Go to Step 7

Go to Step 5

4

  1. Disconnect the seat adjuster switch connector at the memory seat module.
  2. Using a DMM test continuity of all the seat adjuster and memory switches when pressed. Refer to Testing for Continuity in Wiring Systems.

Do all of the seat adjuster switches have continuity when pressed?

Go to Step 7

Go to Step 5

5

Inspect and repair any damage to the seat adjuster switch circuits or connector terminals. Refer to Wiring Repairs and Connector Repairs In Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 6

6

Replace the seat adjuster switch. Refer to Power Seat Switch Replacement .

Is the repair complete?

Go to Step 8

--

7

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

Is the repair complete?

Go to Step 8

--

8

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2