Circuit Description
WARNING: This page is about a different car, the 2006 GMC Yukon XL, 2006 GMC Yukon, 2006 Chevrolet Tahoe, 2006 Chevrolet Suburban, and 2006 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
At each power-up, the transfer case shift control module runs a self-test on the following functions:
- Electronically erasable programmable read only memory (EEPROM) Checksum
- Read only memory (ROM) Checksum
- Random access memory (RAM) Checksum
- RAM Malfunction