Circuit Description
The digital radio antenna is connected to the digital radio receiver by two coax cables. One coax carries the satellite signal, the other coax carries the terrestrial signal. The antenna cable for the satelite antenna also provides a path for D.C. current for powering the antenna.
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.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Radio/Audio System Schematics | ||||
1 | Did you perform the Radio/Audio System Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Important: A design change took place that changed the resistance of the antenna. All service stock uses the second design. Was the vehicle built before February 7, 2002? | Go to Step 3 | Go to Step 4 | |
3 |
Does the resistance measure within the specified value? | 190-210ohms | Go to Step 7 | Go to Step 5 |
4 |
Does the resistance measure within the specified value? | 9k 11k ohms | Go to Step 7 | Go to Step 5 |
5 | Test the antenna cables for an open, short, or high resistance. Refer to Circuit Testing in Wiring Systems. Did you find condition? | -- | Go to Step 6 | Go to Step 9 |
6 | Replace the digital radio antenna cable. Refer to Digital Radio Antenna Cable Replacement . Did you complete the replacement? | Go to Step 11 | -- | |
7 | Inspect for poor connections at the digital radio receiver. 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 |
Important: Always perform the setup procedure for the digital radio receiver. Replace the digital radio receiver. Refer to Digital Radio Receiver Replacement . Did you complete the replacement? | -- | Go to Step 11 | -- |
9 | Inspect for poor connections at the digital radio 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 digital radio antenna. Refer to Digital Radio Antenna Replacement . Did you complete the replacement? | -- | Go to Step 11 | -- |
11 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
