DD15 SPN 84/FMI 13 Troubleshooting

SPN 84/FMI 13

This fault is typically the J1939 wheel-based vehicle speed signal from Source #1, #2, or #3 is missing.‪

Check as follows:‪

1. Check for multiple codes:
   1. If CPC SPN 168/FMI 0/14/18 (Battery Voltage) are present troubleshoot these first.
   2. If MCM SPN 625/FMI 9 is present, repair the CAN line faults.
   3. If only a “J1939 Error” fault is present, go to the next step.
2. Has the CPC been recently reprogrammed?
   1. If yes, check the proper configuration of the CPC.
   2. If no, connect ServiceLink to determine which modules are configured for the vehicle and their communication status. Once this is done, follow the appropriate module communication troubleshooting procedures for the affected module.