Circuit Description
The digital radio antenna is connected to the digital radio receiver (DRR) by 1 coax cable. This coax carries the satellite and the terrestrial signal. The antenna cable for the satellite antenna also provides a path for D.C. current for powering the antenna.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B1259 Antenna Ground Circuit
This vehicle has DTCs which include DTC symptoms. For more information on DTC Symptoms refer to DTC Symptom Description in Vehicle DTC Information.
DTC Symptom | DTC Symptom Descriptor |
|---|---|
04 | Open |
Conditions for Running the DTC
This test is run every 300 milliseconds.
Conditions for Setting the DTC
The DRR 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. |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Radio/Audio System Schematics Connector End View Reference: Entertainment Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | With a scan tool, observe the digital radio antenna in the digital radio receiver (DRR) data list. Does the scan tool indicate that the digital radio antenna is within the specified range? | 17-63 mA | Go to Step 3 | Go to Step 4 |
3 | Test the antenna cable for a short to ground. Refer to Circuit Testing in Wiring Systems. Did you find the condition? | -- | Go to Step 6 | Go to Step 7 |
4 |
Does the voltage measure within the specified range? | 4.5-5.5 V | Go to Step 5 | Go to Step 7 |
5 | Test the antenna cable for an open or a high resistance. Refer to Circuit Testing in Wiring Systems. Did you find the condition? | -- | Go to Step 6 | Go to Step 9 |
6 | Replace the antenna cable. Refer to Navigation Antenna Coaxial Cable Replacement in Cellular Communication. Did you complete the replacement? | -- | Go to Step 11 | -- |
7 | Inspect for poor connections at the DRR. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 8 |
8 | Replace the DRR. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 11 | -- |
9 | Inspect for poor connections at the antenna. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 10 |
10 | Replace the antenna. Refer to Cellular Communications/Digital Radio Antenna Replacement in Cellular Communication. Did you complete the replacement? | -- | Go to Step 11 | -- |
11 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
