MBE 900/4000 SID 254 Troubleshooting

Troubleshooting SID 254

The following procedure will troubleshoot SID 254.‪

254 12 – DDEC-VCU Internal Error

Perform the following steps to troubleshoot 254 12, DDEC-VCU internal error.‪

1. Reset the DDEC-VCU.Note: Turning the ignition off for more than 10 seconds will reset the DDEC-VCU.
2. Check for active fault codes.
   1. If fault code 254 12 is no longer active, erase fault code memory.
   2. If fault code 254 12 is still active, go to step 3 .
3. Check for other active fault codes.
   1. If there are other active fault codes, refer to their appropriate sections.
   2. If there are no other fault codes, replace the DDEC-VCU. Erase fault code memory.