DTC C1991 [DSC/RSC]
id0402b3811800
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DTC
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C1991
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DSC/RSC sensor (abnormal initialization) system
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DETECTION CONDITION
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• The DSC/RSC sensor detects that the initialization procedure has not been performed.
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POSSIBLE CAUSE
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• The initialization procedure for the DSC/RSC sensor has not been performed
• DSC/RSC HU/CM malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY INITIALIZATION PROCEDURE.
• Has the DSC/RSC sensor initialization procedure been performed?
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Yes
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Go to the next step.
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No
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Perform the DSC/RSC sensor initialization procedure, then go to the next step.
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2
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VERIFY DTC TROUBLESHOOTING COMPLETED
• Clear the DTC from the memory.
(See ON-BOARD DIAGNOSIS [DSC/RSC].)
• Is the same DTC present?
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Yes
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Repeat the inspection from Step 1.
If the malfunction occurs again, replace the DSC/RSC HU/CM, then go to the next step.
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No
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Go to the next step.
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3
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VERIFY AFTER REPAIR PROCEDURE
• Are any other DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS [DSC/RSC].)
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No
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DTC troubleshooting completed.
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