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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 163 (On-Board Diagnostic - Connectivity Master Unit) >> DTC B1238-01; Speaker Circuit Malfunction >> With Bose®

With Bose®

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DETECTION CONDITION & POSSIBLE CAUSE

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