Possible Causes
WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| (D509) LIN BUS CIRCUIT SHORTED TO VOLTAGE |
| (D509) LIN BUS CIRCUIT SHORTED TO GROUND |
| (D509) LIN BUS CIRCUIT OPEN/HIGH RESISTANCE |
| GLOW PLUG MODULE |
| GENERATOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .