GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Corvette 🢒 DTC 🢒 DTC B2600

Circuit Description

The seat adjuster motors are controlled by the memory seat module through the adjuster motor control circuits. In an inactive state the adjuster motor control circuits are grounded through switch contacts within the memory seat module. Adjuster motor operation occurs when the memory seat module switches one of the adjuster motor control circuits to battery voltage. The direction of the adjuster motor rotation is determined by which of the control circuits is switched to battery positive and which remains grounded.

Conditions for Setting the DTC
    • The memory seat module detects voltage on an adjuster motor control circuit while no output function is active.
    • The condition must be present for 2 seconds.

Action Taken When the DTC Sets
    • A history DTC will be stored in the memory seat module.
    • Memory seat module DTCs can only be set as history codes even if the fault is current.
    • No driver warning message will be displayed for this DTC.
    • The seat adjuster motor for which the DTC has set will be disabled for as long as the fault is current.

Conditions for Clearing the DTC

Memory seat module DTCs can only be cleared by using a scan tool or the IPC clearing DTCs feature.

Diagnostic Aids

If the fault is not current and the telescoping steering column motor and all the seat adjuster motors operate properly the fault may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. This step determines if a control circuit is shorted to voltage or the fault is in the memory seat module.

Step

Action

Yes

No

Schematic Reference: Memory Seats Schematics

1

Did you perform the Power Seat Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Power Seat Systems

2

Attempt to operate the telescoping steering column and all of the seat adjuster motors through the full range of adjustment.

Do all of the memory seat module functions operate properly?

Go to Diagnostic Aids

Go to Step 3

3

  1. Disconnect the memory seat module connectors containing the inoperative adjuster motor control circuits.
  2. Test and repair the inoperative adjuster motor control circuits for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 5

Go to Step 4

4

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

Is the repair complete?

Go to Step 5

--

5
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the system in order to verify the repair.

Does the DTC reset?

Go to Step 2

System OK