With Bose®
DTC B1238:01 (CONNECTIVITY MASTER UNIT) DETECTION CONDITION AND POSSIBLE CAUSES
| Description |
Audio amplifier circuit malfunction |
| Detection condition |
- The connectivity master unit (CMU) detected a short to ground or short to power supply in the audio amplifier circuit with the ignition switched ON (engine off or on).
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| Fail-safe function |
Not applicable |
| Possible cause |
- Audio amplifier connector or terminal malfunction
- Tuner and amp unit (TAU) connector or terminal malfunction
- Short to ground in wiring harness between the following terminals:
- Tuner and amp unit (TAU) terminal 2A and audio amplifier terminal 1O
- Tuner and amp unit (TAU) terminal 2C and audio amplifier terminal 1P
- Tuner and amp unit (TAU) terminal 2D and audio amplifier terminal 1M
- Tuner and amp unit (TAU) terminal 2F and audio amplifier terminal 1N
- Tuner and amp unit (TAU) terminal 2J and audio amplifier terminal 2F
- Tuner and amp unit (TAU) terminal 2S and audio amplifier terminal 1K
- Tuner and amp unit (TAU) terminal 2T and audio amplifier terminal 2H
- Tuner and amp unit (TAU) terminal 2U and audio amplifier terminal 1L
- Tuner and amp unit (TAU) terminal 2V and audio amplifier terminal 1I
- Tuner and amp unit (TAU) terminal 2X and audio amplifier terminal 1J
- Short to power supply in wiring harness between the following terminals:
- Tuner and amp unit (TAU) terminal 2A and audio amplifier terminal 1O
- Tuner and amp unit (TAU) terminal 2C and audio amplifier terminal 1P
- Tuner and amp unit (TAU) terminal 2D and audio amplifier terminal 1M
- Tuner and amp unit (TAU) terminal 2F and audio amplifier terminal 1N
- Tuner and amp unit (TAU) terminal 2J and audio amplifier terminal 2F
- Tuner and amp unit (TAU) terminal 2S and audio amplifier terminal 1K
- Tuner and amp unit (TAU) terminal 2T and audio amplifier terminal 2H
- Tuner and amp unit (TAU) terminal 2U and audio amplifier terminal 1L
- Tuner and amp unit (TAU) terminal 2V and audio amplifier terminal 1I
- Tuner and amp unit (TAU) terminal 2X and audio amplifier terminal 1J
- Audio amplifier malfunction
- Tuner and amp unit (TAU) malfunction
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