B1259

DTC B1259

CIRCUIT DESCRIPTION




The digital radio antenna is connected to the digital radio receiver by 2 coax cables. One coax carries the satellite signal, the other coax carries the terrestrial signal. The antenna cable for the satellite antenna also provides a path for DTC current for powering the antenna.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B1259 Antenna Ground Circuit

CONDITIONS FOR RUNNING THE DTC
This test is run every 300 milliseconds.

CONDITIONS FOR SETTING THE DTC
The digital radio receiver detects an antenna fault.

ACTION TAKEN WHEN THE DTC SETS
The radio displays, No XM Signal.

CONDITIONS FOR CLEARING THE DTC
- The condition must be corrected.
- The DTC clears after 100 malfunction free ignition cycles.

TEST DESCRIPTION

Steps 1-10:

The number below refers to the step number on the diagnostic table.
3. Due to current limiting capabilities in the module, an antenna cable shorted to ground could still show 1200-1800 mV.