DTC B1238:49 [CONNECTIVITY MASTER UNIT]
id1602a1000800
Outline
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System malfunction location |
Audio amplifier internal malfunction |
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Detection condition
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• The connectivity master unit (CMU) detects an internal malfunction in the audio amplifier for 30 s.
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Fail-safe
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• No audio output.
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Possible cause
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• Audio amplifier malfunction
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System wiring diagram
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Not applicable
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Connector diagram
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Not applicable
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Diagnostic Procedure
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Step |
Inspection |
Results |
Action |
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1
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INSPECT AUDIO AMPLIFIER FOR MALFUNCTION
• Clear the DTC recorded in the memory.
(Refer to the [CLEARING DTC] in the workshop manual)
• Perform the DTC inspection for the connectivity master unit (CMU).
(Refer to the [DTC INSPECTION] in the workshop manual)
• Is the same Pending DTC present?
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Yes
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
(Refer to the [CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW] in the workshop manual)
If the CAN communication is normal, replace the audio amplifier and perform the repair completion verification.
(Refer to the [AUDIO AMPLIFIER REMOVAL/INSTALLATION] in the workshop manual)
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No
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Go to the next step.
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Repair completion verification
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VERIFY IF OTHER DTCs ARE DISPLAYED
• Perform the DTC inspection.
(Refer to the [DTC INSPECTION] in the workshop manual)
• Are any other DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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