DTC U0599:86 [BCM]
id0902f5071600
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Description |
Error signal received from DC-DC converter |
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Detection condition
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• BCM receives the error signals from the DC-DC converter for 5 s or more with the ignition switched ON (engine off or on).
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Fail-safe
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Not applicable
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Possible cause
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• DC-DC converter malfunction
• BCM malfunction
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System wiring diagram
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Not applicable
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Diagnostic Procedure
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Step |
Inspection |
Action |
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1
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VERIFY BCM DTCs AGAIN
• Clear the DTC for the BCM using the M-MDS.
(See CLEARING DTC [BCM].)
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• Retrieve the BCM DTCs using the M-MDS.
(See DTC INSPECTION [BCM].)
• Is the same DTC displayed?
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Yes
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Go to the next step.
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No
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Go to Step 5.
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2
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VERIFY PCM DTCs
• Retrieve the PCM DTCs using the M-MDS.
• Are any other DTCs displayed?
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Yes
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Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [SKYACTIV-D 1.5].)
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No
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Go to the next step.
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3
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INSPECT DC-DC CONVERTER
• Inspect the DC-DC converter.
• Is the DC-DC converter normal?
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Yes
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Go to the next step.
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No
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Replace the DC-DC converter, then go to the next step.
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4
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VERIFY THAT REPAIRS HAVE BEEN COMPLETED
• Clear the DTC for the BCM using the M-MDS.
(See CLEARING DTC [BCM].)
• Switch the ignition ON (engine off or on) and wait for 5 s or more.
• Retrieve the BCM DTCs using the M-MDS.
(See DTC INSPECTION [BCM].)
• Is the same DTC displayed?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the BCM.
Go to the next step.
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No
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Go to the next step.
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5
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VERIFY IF OTHER DTCs DISPLAYED
• Are any other DTCs displayed?
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Yes
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Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [BCM].)
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No
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DTC troubleshooting completed.
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