GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Corvette 🢒 Body and Accessories 🢒 Seats 🢒 DTC B2172, B2177, B2182, B2187, B2192, or B2197

Circuit Description

The seat adjuster switch signal circuits are supplied 12 volts through resistors within the memory seat module. When a seat adjuster switch is pressed the signal circuit is grounded. Closing the signal circuit to ground pulls the signal circuit voltage low indicating to the memory seat module the switch status is active.

Conditions for Setting the DTC

A seat adjuster switch input to the memory seat module is active for more than 20 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 these DTCs.
    • The seat adjuster function for which the DTC has set will be disabled for as long as the condition 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 switch status on the scan tool goes from active when connected to inactive when disconnected, the switch contacts may be stuck.
    • If the fault is not current the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Step

Action

Yes

No

Schematic Reference: Memory Seats Schematics

1

Did you perform the Power Seats Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Power Seat Systems

2
  1. Install a scan tool.
  2. Observe the seat adjuster switch parameter for which the DTC has set in the SCM data list.

Does the scan tool display inactive?

Go to Diagnostic Aids

Go to Step 3

3
  1. Disconnect the seat adjuster switch connector.
  2. Observe the seat adjuster switch parameter in the SCM data list.

Does the scan tool display inactive?

Go to Step 5

Go to Step 4

4

Test and repair the seat switch signal circuit for which the DTC has set for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 7

Go to Step 6

5

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

Is the repair complete?

Go to Step 7

--

6

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

Is the repair complete?

Go to Step 7

--

7
  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