DD15 SPN 70/FMI 19 Troubleshooting

SPN 70/FMI 19

This fault is typically J1939 Park Brake Switch signal from Source #1, #2, or #3 is erratic.‪

Check as follows:‪

1. Check for multiple codes:
   1. If CPC SPN 168/FMI 0/14/18 (Battery Voltage) are present troubleshoot and repair these first.
   2. If MCM SPN 625/FMI 9 is present, troubleshoot and repair the CAN line.
   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.