DTC Detection Logic
WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
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DTC
(On board display)
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Trouble diagnosis name
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DTC detecting condition
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C1B56
(86)
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SONAR CIRCUIT
(Sonar circuit)
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ADAS control unit detects that rear sonar control unit circuit has a malfunction.
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