Test Description
WARNING: This page is about a different car, the 2005 GMC Canyon and 2005 Chevrolet Colorado. 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: Early design modules support the mV reading while later design modules support the mA reading.
- 3: 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 - 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? |
1200-1800 mV or 42-118 mA | Go to Step 3 | Go to Step 4 |
| 3 | Test the antenna cables 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 |
|
4.5-5.5 V | Go to Step 5 | Go to Step 7 |
| 5 | Test the antenna cables 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 cables. Refer to Coaxial Cable Replacement - Digital Radio . 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 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 Antenna Replacement - Digital Radio . Did you complete the replacement? |
- | Go to Step 11 | - |
| 11 |
|
- | Go to Step 2 | System OK |