DTC B1528:17 [DASH-ELECTRICAL SUPPLY UNIT]
id0702k8011700
Outline
System malfunction location |
PTC heater high power supply voltage input |
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Detection condition
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• The dash-electrical supply unit detects that the PTC heater power supply circuit voltage is extremely high.
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Fail-safe
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• Stops the PTC heater output.
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Possible cause
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• DTCs are stored in the PCM.
• Battery malfunction
• Generator malfunction
• PTC heater malfunction
• Dash-electrical supply unit 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
Step |
Inspection |
Results |
Action |
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1
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INSPECT PCM FOR MALFUNCTION
• Perform the DTC inspection for the PCM.
(See DTC INSPECTION.)
• Are any DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-D)].)
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No
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Go to the next step.
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2
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INSPECT BATTERY FOR MALFUNCTION
• Inspect the applicable part.
(See BATTERY INSPECTION [(E)].)
• Is the part normal?
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Yes
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Repair or replace the malfunctioning location and perform the repair completion verification.
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No
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Go to the next step.
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3
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INSPECT GENERATOR FOR MALFUNCTION
• Inspect the applicable part.
• Is the part normal?
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Yes
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Repair or replace the malfunctioning location and perform the repair completion verification.
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No
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Go to the next step.
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4
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INSPECT PTC HEATER FOR MALFUNCTION DEPENDING ON REPEATABILITY
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory.
(See CLEARING DTC.)
• Perform the DTC inspection for the dash-electrical supply unit.
(See DTC INSPECTION.)
• 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.
If the CAN communication is normal, replace the malfunctioning location and perform the repair completion verification.
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No
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Go to repair completion verification 2.
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Repair completion verification 1
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VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory.
(See CLEARING DTC.)
• Perform the DTC inspection for the dash-electrical supply unit.
(See DTC INSPECTION.)
• 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.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction recurs, replace the dash-electrical supply unit, then go to the next step.
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No
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Go to the next step.
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Repair completion verification 2
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VERIFY IF OTHER DTCs DISPLAYED
• Perform the DTC inspection.
(See DTC INSPECTION.)
• Are any 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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