Circuit/System Testing
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the seat adjuster switch.
- Ignition ON, verify the scan tool seat switch parameters listed below are Inactive.
- Front Vertical Upward Switch
- Front Vertical Downward Switch
- Rear Vertical Upward Switch
- Rear Vertical Downward Switch
- Horizontal Forward Switch
- Horizontal Rearward Switch
- Recline Forward Switch
- Recline Rearward Switch
- If not the specified value, test the appropriate signal circuit listed below for a short to voltage. If the circuit tests normal, replace the MSM.
- Front vertical upward switch terminal A
- Front vertical downward switch terminal K
- Rear vertical upward switch terminal F
- Rear vertical downward switch terminal J
- Horizontal forward switch terminal D
- Horizontal rearward switch terminal C
- Recline forward switch terminal H
- Recline rearward switch terminal G
- If all circuits test normal, test or replace the seat adjuster switch.