This diagnostic procedure supports the following DTC:
• | DTC B0019 EEPROM Error |
• | DTC B0020 RAM Failure |
The electrically erasable programmable read only memory (EEPROM) data is divided into eight tables, and each table has a checksum. When each table is loaded into RAM, the checksum is verified. If the checksum is wrong the DTC is set.
The body control module (BCM) maintains a random access memory (RAM) copy of the electrically erasable programmable read only memory (EEPROM) data. Each of the eight tables is checked periodically to verify the checksum. If the checksum is wrong the DTC is set.
Clear the DTC. If the DTC resets, remove fuse F29 to reset the BCM.
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Body Control System Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 | Using the scan tool, clear the DTC. If the DTC resets, remove fuse F29 to reset the body control module (BCM). Does the DTC reset? | Go to Step 3 | System OK |
3 |
Did you complete the replacement? | Go to Step 1 | -- |