Circuit/System Testing
WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the digital audio antenna coax from the digital audio broadcast module. Connect the EL-48028 to the radio. See Special Tools .
- Radio ON, tuned to Digital Audio, verify DTC B1259 is not set as current.
- If the DTC is current, replace the A12 digital radio receiver.
- Ignition OFF, reconnect the antenna coax to the radio, disconnect the digital radio antenna coax from the T4H digital radio antenna.
- Ignition ON, test for 4.5-5.5 V between the antenna coax center terminal and the coax outer shield.
- If not within the specified range, replace the antenna coax.
- If all circuits test normal, replace the T4H digital radio antenna.