DTC B1A20-2B: Antenna Amplifier Signal Circuit Malfunction
B1A20-2B: (CMU) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Antenna amplifier signal circuit malfunction |
| Detection condition |
- The remote tuner (RT) detects a short to ground in the antenna amplifier signal circuit, a short to the power supply, or a short circuit between antenna amplifier signal circuit and mutual shield.
|
| Fail-safe |
|
| Possible cause |
- DTCs are stored in the body control module (BCM). (Internal malfunction related DTCs are stored.) (See DTC TABLE [BCM]
.)
- DTCs are stored in the connectivity master unit (CMU). (Internal malfunction related DTCs are stored.) (See DTC TABLE [CMU] .)
- DTC is stored in the connectivity master unit (CMU). (DTC related to the remote tuner (RT) is stored.) (See B1A33-49: [CMU] .)
- Malfunction in wiring harness (including connector/terminal) between antenna amplifier and remote tuner (RT) (See
CIRCUIT INSPECTION
.) (See
CONNECTOR INSPECTION
.)
- Antenna amplifier malfunction (Refer to [ANTENNA AMPLIFIER INSPECTION]
in service information.)
- Remote tuner (RT) malfunction (Refer to REMOTE TUNER (RT) REMOVAL/INSTALLATION
in service information.)
|
| Repeatability verification procedure |
- Clear the DTC recorded in the memory. (See
CLEARING DTC
.)
|
 Courtesy of MAZDA MOTORS CORP.
|
| 1 |
Remote tuner (RT) |
| 2 |
Antenna amplifier |