4SD (U.S.A. and Canada): Outline
DTC B1A21-2B: (CONNECTIVITY MASTER UNIT) DETECTION CONDITION AND POSSIBLE CAUSE - 4SD (U.S.A. AND CANADA
| System malfunction location |
FM antenna amplifier signal circuit malfunction |
| Detection condition |
- The remote tuner (RT) detects a short to power supply or short to ground in the FM antenna amplifier signal circuit, or a short circuit between FM antenna amplifier signal circuit and shield wire for 2 s.
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| Fail-safe |
Not applicable |
| Possible cause |
- Remote tuner (RT) connector or terminal malfunction
- FM antenna amplifier feeder malfunction
- Short to ground in FM antenna amplifier signal circuit
- Short to power supply in FM antenna amplifier signal circuit
- Short circuit between FM antenna amplifier signal circuit and shield wire
- FM antenna amplifier malfunction
- Remote tuner (RT) malfunction
|
 Courtesy of MAZDA MOTORS CORP.
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