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DTC C0044:1C, C0044:28, C0044:49, C0044:54, C0044:56, C0044:64, C0044:84 OR C0044:85 [DSC HU/CM]

id040262004900

Outline

System malfunction location

Brake fluid pressure sensor

Detection condition

•  C0044:1C

―  The DSC HU/CM detects that the supply voltage to the brake fluid pressure sensor is outside of the specification.

•  C0044:28

―  The DSC HU/CM detects that the offset amount of the brake fluid pressure signal is outside of the specification.

•  C0044:49

―  The DSC HU/CM detects any of the following conditions.

•  Brake fluid pressure sensor supply voltage malfunction

•  Brake fluid pressure sensor internal malfunction or poor functioning

•  C0044:54

―  The DSC HU/CM detects that the brake fluid pressure sensor initialization was not implemented.

•  C0044:56

―  The DSC HU/CM and brake fluid pressure sensor configuration information do not match.

•  C0044:64

―  The DSC HU/CM detects a non-conformity in any of the following signals.

•  Brake fluid pressure signals of 2 systems received from brake fluid pressure sensor

•  Brake fluid temperature signals of 2 systems received from brake fluid pressure sensor

•  C0044:84

―  The DSC HU/CM detects that the brake fluid pressure signal of 1 out of the 2 brake fluid pressure sensors is the specification or less.

•  C0044:85

―  The DSC HU/CM detects that the brake fluid pressure signal of 1 out of the 2 brake fluid pressure sensors is the specification or more.

Fail-safe

Refer to “DTC Table” and “Fail-safe Function Malfunction Contents Table”.(See DTC TABLE [DSC HU/CM (E)].)

Possible cause

•  The initialization procedure for the brake fluid pressure sensor has not been performed.

•  Brake fluid pressure sensor malfunction

•  Open or short circuit in the brake fluid pressure sensor circuit in DSC HU/CM

System wiring diagram

Not applicable

Connector diagram

Not applicable

System malfunction location	Brake fluid pressure sensor
Detection condition	• C0044:1C ― The DSC HU/CM detects that the supply voltage to the brake fluid pressure sensor is outside of the specification. • C0044:28 ― The DSC HU/CM detects that the offset amount of the brake fluid pressure signal is outside of the specification. • C0044:49 ― The DSC HU/CM detects any of the following conditions. • Brake fluid pressure sensor supply voltage malfunction • Brake fluid pressure sensor internal malfunction or poor functioning • C0044:54 ― The DSC HU/CM detects that the brake fluid pressure sensor initialization was not implemented. • C0044:56 ― The DSC HU/CM and brake fluid pressure sensor configuration information do not match. • C0044:64 ― The DSC HU/CM detects a non-conformity in any of the following signals. • Brake fluid pressure signals of 2 systems received from brake fluid pressure sensor • Brake fluid temperature signals of 2 systems received from brake fluid pressure sensor • C0044:84 ― The DSC HU/CM detects that the brake fluid pressure signal of 1 out of the 2 brake fluid pressure sensors is the specification or less. • C0044:85 ― The DSC HU/CM detects that the brake fluid pressure signal of 1 out of the 2 brake fluid pressure sensors is the specification or more.
Fail-safe	Refer to “DTC Table” and “Fail-safe Function Malfunction Contents Table”.(See DTC TABLE [DSC HU/CM (E)].)
Possible cause	• The initialization procedure for the brake fluid pressure sensor has not been performed. • Brake fluid pressure sensor malfunction • Open or short circuit in the brake fluid pressure sensor circuit in DSC HU/CM
System wiring diagram	Not applicable
Connector diagram	Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

VERIFY SENSOR INITIALIZATION PERFORMANCE CONDITION FOR DSC-RELATED PARTS

•  Has the sensor initialization for the DSC-related parts been performed?

Yes

Go to the next step.

No

Perform the sensor initialization for the DSC-related parts and perform repair completion verification.

(See DSC RELATED PARTS SENSOR INITIALIZATION PROCEDURE [(E)].)

Repair completion verification 1

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 DSC HU/CM.
(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 DSC HU/CM, then go to the next step.
(See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (E)].)

(See DSC HU/CM 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.

Step	Inspection	Results	Action
1	VERIFY SENSOR INITIALIZATION PERFORMANCE CONDITION FOR DSC-RELATED PARTS • Has the sensor initialization for the DSC-related parts been performed?	Yes	Go to the next step.
1		No	Perform the sensor initialization for the DSC-related parts and perform repair completion verification. (See DSC RELATED PARTS SENSOR INITIALIZATION PROCEDURE [(E)].)
Repair completion verification 1	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 DSC HU/CM. (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 DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (E)].) (See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].)
Repair completion verification 1		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.
Repair completion verification 2		No	DTC troubleshooting completed.