Test Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
The number below refers to the step number on the diagnostic table.
- 2: First design has 2 antenna cables connected to the digital radio receiver, second design has 1 antenna cable.
- 3: Early design modules support the mV reading while later design modules support the mA reading.
- 5: Due to current limiting capabilities in the module, an antenna cable shorted to ground could still show 1200-1800 mV.
DTC B1259
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Radio/Audio System Schematics | ||||
| 1 | Did you perform the Diagnostic System Check - Entertainment System? | - | Go to Step 2 | Go to Diagnostic System Check - Entertainment System |
| 2 | Does the digital radio receiver have 2 antenna cables? | Go to Step 3 | Go to Step 4 | |
| 3 | With a scan tool, observe the digital radio antenna in the digital radio receiver data list. Does the scan tool indicate that the digital radio antenna is within the specified range? |
1200-1800 mV or 42-118 mA | Go to Step 5 | Go to Step 6 |
| 4 | With a scan tool, observe the digital radio antenna in the digital radio receiver data list. Does the scan tool indicate that the digital radio antenna is within the specified range? |
17-63 mA | Go to Step 9 | Go to Step 6 |
| 5 | Test the antenna cables for a short to ground. Refer to Circuit Testing
in Wiring Systems. Did you find the condition? |
- | Go to Step 8 | Go to Step 11 |
| 6 |
|
4.5-5.5 V | Go to Step 7 | Go to Step 9 |
| 7 | Test the antenna cables for an open, or high resistance. Refer to Circuit Testing
in Wiring Systems. Did you find the condition? |
- | Go to Step 8 | Go to Step 11 |
| 8 | Replace the antenna cables. Refer to Coaxial Cable Replacement - Digital Radio . Did you complete the replacement? |
- | Go to Step 13 | - |
| 9 | 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 13 | Go to Step 10 |
| 10 |
IMPORTANT:
Always perform the setup procedure for the digital radio receiver. Refer to Digital Radio Receiver Setup Replace the digital radio receiver. Refer to Receiver Replacement - Digital Radio .Did you complete the replacement? |
- | Go to Step 13 | - |
| 11 | 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 13 | Go to Step 12 |
| 12 | Replace the digital radio antenna. Refer to Antenna Replacement - Digital Radio . Did you complete the replacement? |
- | Go to Step 13 | - |
| 13 |
|
- | Go to Step 2 | System OK |