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DTC C05D3:97 [ELECTRONICALLY CONTROLLED BRAKE UNIT]

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Note

•  If the battery terminal is disconnected before the electronically controlled brake unit shuts down, DTC C05D3:97 is output. In this case, the electronically controlled brake unit cannot operate normally and the initial check takes longer, but this does not indicate a vehicle malfunction.

•  The i-ACTIVSENSE warning light may turn on when DTC C05D3:97 is output, but this does not indicate an i-ACTIVSENSE related system malfunction.

Outline

System malfunction location	Electronically controlled brake unit
Detection condition	•  The electronically controlled brake unit detects that the brake pedal is excessively depressed. •  The electronically controlled brake unit starts up in an irregular condition.
Fail-safe	Refer to “DTC Table” and “Fail-safe Function Malfunction Contents Table”. (See DTC TABLE [ELECTRONICALLY CONTROLLED BRAKE UNIT].)
Possible cause	•  Brake pedal is excessively depressed •  Removing the battery terminal before shutdown of the electronically controlled brake unit •  Electronically controlled brake unit malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable

Diagnostic Procedure

Step	Inspection	Results	Action
1	VERIFY IF BRAKE PEDAL IS EXCESSIVELY DEPRESSED •  Verify with the customer whether or not the brake pedal was excessively depressed before bringing in the vehicle. •  Is the brake pedal excessively depressed?	Yes	System is normal. (Explain to the customer that a DTC was displayed by the fail-safe operating to protect the electronically controlled brake unit due to excessively depressing the brake pedal.)
		No	Go to the next step.
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Perform the work of depressing the brake pedal for 3 s or more and then releasing it for 5 times or more with the ignition switched ON (engine off or on). •  Perform the DTC inspection for the electronically controlled brake unit. (See DTC INSPECTION.) •  Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. •  If the malfunction recurs, replace the electronically controlled brake unit, then go to the next step. (See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [L.H.D.].) (See ELECTRONICALLY CONTROLLED BRAKE UNIT REMOVAL/INSTALLATION [R.H.D.].)
		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs DISPLAYED •  Perform the DTC inspection. (See DTC INSPECTION.) •  Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
		No	DTC troubleshooting completed.