For 1990-2009 cars

1. Perform the Diagnostic System Check - Vehicle.
2. Using a test lamp, test the Memory Seat Module (MSM) supply voltage circuit.

⇒ | If test lamp does not illuminate, repair or replace the supply voltage circuit.

3. Using a DMM, test the MSM communications circuit for resistance.

⇒ | If greater than 5 ohms, repair or replace the circuits.

⇒ | If less than 5 ohms, refer to Body Control Module for further diagnosis.