Trouble Codes

Short to Battery - Either or both of the bus wires are shorted to the battery potential.

Short to 5 Volts - Either or both of the bus wires are shorted to a 5 volt potential.

Short to Ground - Either or both of the bus wires are shorted to ground.

Bus (+) & (-) Shorted Together - The two bus wires are shorted together.

No Termination - The bus system has lost connection with all of its terminators. The Instrument Cluster (MIC) and Powertrain Controller (PCM) supply termination for the 1999 Ram Trucks.

Bus Bias Level Too Low - Either or both of the bus wire potentials are significantly below their normal 2.5 volts.

Bus Bias Level Too High - Either or both of the bus wire potentials are significantly above their normal 2.5 volts.

No Bus Bias - The bus system has lost connection with all modules that provide basis. The Instrument Cluster (MIC) provides the CCD bus bias for the 1999 Ram Trucks.

Bus (+) Open - The bus (+) wire has lost connection with termination and/or bias.

Bus (-) Open - The bus (-) wire has lost connection with termination and/or bias.

Not Receiving Bus Messages Correctly - The DRB cannot communicate over the bus and does not know why.