Possible Causes
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| INOPERATIVE SCAN TOOL |
| DATA LINK CONNECTOR (DLC) |
| DATA LINK CONNECTOR FUSED B (+) CIRCUIT OPEN OR HIGH RESISTANCE |
| DATA LINK CONNECTOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
| CAN C (+) BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| CAN C (-) BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| POOR TERMINAL CONTACT OR CONNECTOR CONNECTION(S) |
| STAR CONNECTOR |
| ANY MODULE ON THE CAN C BUS |
NORMAL CAN C BUS CIRCUIT VOLTAGE TABLE
| CIRCUIT | NORMAL VOLTAGE VALUES |
|---|---|
| CAN C BUS (-) | 1.5 - 2.5 volts |
| CAN C BUS (+) | 2.5 - 3.5 volts |
| Difference Between CAN C BUS (+) and CAN C BUS (-) | 0.5 volt |