BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C13D909,C14EC00; Brake Pressure Too Low (Brake Booster) Component Failure; 2022 - 2025 MY RAV4 RAV4 HV [12/2021

Last Modified: 05-08-2025	6.11:8.1.0	Doc ID: RM10000000214QO
Model Year Start: 2022	Model: RAV4	Prod Date Range: [12/2021 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C13D909,C14EC00; Brake Pressure Too Low (Brake Booster) Component Failure; 2022 - 2025 MY RAV4 RAV4 HV [12/2021 - ]

DTC

C13D909

Brake Pressure Too Low (Brake Booster) Component Failure

DTC

C14EC00

Brake Pressure Control solenoid "C"

DESCRIPTION

Refer to DTCs C139A00, C13D900 and C14EC7E.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Note
C13D909	Brake Pressure Too Low (Brake Booster) Component Failure	Fluid pressure control performance degraded (pressure excessively low).	Brake fluid leaks Wire harness and connector Brake booster with master cylinder assembly	Comes on	SAE Code: C13D9 Output ECU: No. 2 skid control ECU (brake actuator assembly)
C14EC00	Brake Pressure Control solenoid "C"	SLA valve malfunction (stuck closed, etc.)	Brake fluid leaks Wire harness and connector Brake booster with master cylinder assembly	Comes on	SAE Code: C14EE Output ECU: No. 2 skid control ECU (brake actuator assembly)

MONITOR DESCRIPTION

C13D9:

The No. 2 skid control ECU (brake actuator assembly) monitors the relationship between the specified increase in servo pressure and the target brake fluid pressure.
When the brake pedal is depressed and the relationship between the servo pressure and the target brake fluid pressure is outside of the normal range, the No. 2 skid control ECU (brake actuator assembly) judges that the increasing pressure is abnormal and illuminates the MIL and stores a DTC.

C14EE:

When the brake pedal is depressed, the No. 1 skid control ECU (brake booster with master cylinder assembly) monitors the servo pressure and increases the servo pressure by driving the linear solenoid (SLA).
When the brake pedal is depressed, if the actual servo pressure does not change even when the target servo pressure increases for a certain amount of time, the No. 2 skid control ECU (brake actuator assembly) judges that the linear solenoid (SLA) is stuck closed (the pressure increase during initial braking is abnormal) and illuminates the MIL and stores this DTC.

MONITOR STRATEGY

Related DTCs	C13D9: Brake pressure control solenoid pressure too low C14EE: Brake pressure control solenoid "C" stuck on
Required Sensors/Components(Main)	No. 2 skid control ECU (brake actuator assembly) Brake actuator (brake booster with master cylinder assembly)
Required Sensors/Components(Related)	Stop light switch assembly No. 2 skid control ECU (brake actuator assembly) Brake actuator (brake booster with master cylinder assembly)
Frequency of Operation	Continuous
Duration	0.36 seconds: C13D9 (Case 1-2) 0.72 seconds: C13D9 (Case 1-1) 0.984 seconds: C14EE
MIL Operation	Immediately
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

C13D9 (Case1-1)

*: Electronically Controlled Brake System
Monitor runs whenever the following DTCs are not stored	C0573 (Case 1): Accumulator pressure sensor lost communication C0573 (Case 2): Accumulator pressure sensor internal malfunction C0573 (Case 3): Accumulator pressure sensor invalid data C0574: Brake booster motor pressure sensor stuck C0577 (Case 1): Reaction force pressure sensor lost communication C0577 (Case 2): Reaction force pressure sensor internal malfunction C0577 (Case 3): Reaction force pressure sensor invalid data C0578: Reaction force pressure sensor exceeded learning limit C0594: Brake booster motor performance C05A1 (Case 1): Servo pressure sensor lost communication C05A1 (Case 2): Servo pressure sensor internal malfunction C05A1 (Case 3): Servo pressure sensor invalid data C05A2: Servo pressure sensor exceeded learning limit C05C0: Brake pedal position sensor learning not complete C05C1: Brake pedal position sensor learning not complete C1100 (Case 1): Brake pedal position sensor voltage circuit/open C1100 (Case 2): Brake pedal position sensor invalid data C1103 (Case 1): Brake pedal position sensor voltage circuit/open C1103 (Case 2): Brake pedal position sensor invalid data C110F: Brake system voltage circuit low C121F: Brake system voltage performance C1256: Brake booster motor pressure too low C12FA: Brake system voltage power supply relay open circuit C12FB: Brake system voltage power supply relay circuit high C1345: Brake pressure control solenoid open current learning not complete C13DA: Brake pressure control solenoid pressure too high C140F: Brake booster motor circuit open C141C (Case 1): Brake booster motor relay output shorted high C141C (Case 2): Brake booster motor freewheeling MOS output shorted high C141C (Case 3 to 10): Brake booster motor gate voltage output functional C141D: Brake booster motor open circuit C141E: Brake booster motor circuit high C1451: High pressure hydraulic tube air bleeding not complete C1496: Reaction force pressure sensor voltage circuit low C1497: Reaction force pressure sensor voltage circuit high C1498: Servo pressure sensor voltage circuit low C1499: Servo pressure sensor voltage circuit high C149E: Accumulator pressure sensor voltage circuit low C149F: Accumulator pressure sensor voltage circuit high C14B4: Reaction force pressure sensor intermittent/erratic C14C4: Servo pressure sensor intermittent/erratic C14C7 (Case 3 to 9): Brake system voltage circuit low C14CA: Brake system voltage open circuit C14D3: Accumulator pressure sensor intermittent/erratic C14DE: Brake system voltage circuit low C14EE: Brake pressure control solenoid "C" stuck on C14F3: Brake pressure control solenoid SLA circuit low C14F4: Brake pressure control solenoid SLA circuit high C14FC: Brake pressure control solenoid SLR circuit low C14FD: Brake pressure control solenoid SLR circuit high C1509: Brake pressure control solenoid SSA circuit low C150A: Brake pressure control solenoid SSA circuit high C150C: Brake pressure control solenoid "F" stuck on C150F: Brake pressure control solenoid SGH circuit low C1510: Brake pressure control solenoid SGH circuit high P057A: Brake pedal position sensor invalid data P057C: Brake pedal position sensor open circuit P057D: Brake pedal position sensor circuit high P057E: Brake pedal position sensor intermittent/erratic P05DB: Brake pedal position sensor invalid data P05DD: Brake pedal position sensor open circuit P05DE: Brake pedal position sensor circuit high P05DF: Brake pedal position sensor intermittent/erratic P05E0: Brake pedal position sensor "A"/"B" correlation P05FF: Brake position / reaction force pressure correlation U0129: Lost communication with ECB*_ECU (C-bus)
All of the following conditions are met	-
Servo pressure sensor fail	Not detected
Brake-by-wire controlled mode	On
Brake	On
ABS/TRAC/VSC operation	On

C13D9 (Case1-2)

*: Electronically Controlled Brake System
Monitor runs whenever the following DTCs are not stored	C0573 (Case 1): Accumulator pressure sensor lost communication C0573 (Case 2): Accumulator pressure sensor internal malfunction C0573 (Case 3): Accumulator pressure sensor invalid data C0574: Brake booster motor pressure sensor stuck C0577 (Case 1): Reaction force pressure sensor lost communication C0577 (Case 2): Reaction force pressure sensor internal malfunction C0577 (Case 3): Reaction force pressure sensor invalid data C0578: Reaction force pressure sensor exceeded learning limit C0594: Brake booster motor performance C05A1 (Case 1): Servo pressure sensor lost communication C05A1 (Case 2): Servo pressure sensor internal malfunction C05A1 (Case 3): Servo pressure sensor invalid data C05A2: Servo pressure sensor exceeded learning limit C05C0: Brake pedal position sensor learning not complete C05C1: Brake pedal position sensor learning not complete C1100 (Case 1): Brake pedal position sensor voltage circuit/open C1100 (Case 2): Brake pedal position sensor invalid data C1103 (Case 1): Brake pedal position sensor voltage circuit/open C1103 (Case 2): Brake pedal position sensor invalid data C110F: Brake system voltage circuit low C121F: Brake system voltage performance C1256: Brake booster motor pressure too low C12FA: Brake system voltage power supply relay open circuit C12FB: Brake system voltage power supply relay circuit high C1345: Brake pressure control solenoid open current learning not complete C13DA: Brake pressure control solenoid pressure too high C140F: Brake booster motor circuit open C141C (Case 1): Brake booster motor relay output shorted high C141C (Case 2): Brake booster motor freewheeling MOS output shorted high C141C (Case 3 to 10): Brake booster motor gate voltage output functional C141D: Brake booster motor open circuit C141E: Brake booster motor circuit high C1451: High pressure hydraulic tube air bleeding not complete C1496: Reaction force pressure sensor voltage circuit low C1497: Reaction force pressure sensor voltage circuit high C1498: Servo pressure sensor voltage circuit low C1499: Servo pressure sensor voltage circuit high C149E: Accumulator pressure sensor voltage circuit low C149F: Accumulator pressure sensor voltage circuit high C14B4: Reaction force pressure sensor intermittent/erratic C14C4: Servo pressure sensor intermittent/erratic C14C7 (Case 3 to 9): Brake system voltage circuit low C14CA: Brake system voltage open circuit C14D3: Accumulator pressure sensor intermittent/erratic C14DE: Brake system voltage circuit low C14EE: Brake pressure control solenoid "C" stuck on C14F3: Brake pressure control solenoid SLA circuit low C14F4: Brake pressure control solenoid SLA circuit high C14FC: Brake pressure control solenoid SLR circuit low C14FD: Brake pressure control solenoid SLR circuit high C1509: Brake pressure control solenoid SSA circuit low C150A: Brake pressure control solenoid SSA circuit high C150C: Brake pressure control solenoid "F" stuck on C150F: Brake pressure control solenoid SGH circuit low C1510: Brake pressure control solenoid SGH circuit high P057A: Brake pedal position sensor invalid data P057C: Brake pedal position sensor open circuit P057D: Brake pedal position sensor circuit high P057E: Brake pedal position sensor intermittent/erratic P05DB: Brake pedal position sensor invalid data P05DD: Brake pedal position sensor open circuit P05DE: Brake pedal position sensor circuit high P05DF: Brake pedal position sensor intermittent/erratic P05E0: Brake pedal position sensor "A"/"B" correlation P05FF: Brake position / reaction force pressure correlation U0129: Lost communication with ECB*_ECU (C-bus)
All of the following conditions are met	-
Servo pressure sensor fail	Not detected
Brake-by-wire controlled mode	On
Brake	On
ABS/TRAC/VSC operation	Off

C14EE

*: Electronically Controlled Brake System
Monitor runs whenever the following DTCs are not stored	C0573 (Case 1): Accumulator pressure sensor lost communication C0573 (Case 2): Accumulator pressure sensor internal malfunction C0573 (Case 3): Accumulator pressure sensor invalid data C0574: Brake booster motor pressure sensor stuck C0577 (Case 1): Reaction force pressure sensor lost communication C0577 (Case 2): Reaction force pressure sensor internal malfunction C0577 (Case 3): Reaction force pressure sensor invalid data C0578: Reaction force pressure sensor exceeded learning limit C0594: Brake booster motor performance C05A1 (Case 1): Servo pressure sensor lost communication C05A1 (Case 2): Servo pressure sensor internal malfunction C05A1 (Case 3): Servo pressure sensor invalid data C05A2: Servo pressure sensor exceeded learning limit C05C0: Brake pedal position sensor learning not complete C05C1: Brake pedal position sensor learning not complete C1100 (Case 1): Brake pedal position sensor voltage circuit/open C1100 (Case 2): Brake pedal position sensor invalid data C1103 (Case 1): Brake pedal position sensor voltage circuit/open C1103 (Case 2): Brake pedal position sensor invalid data C110F: Brake system voltage circuit low C121F: Brake system voltage performance C1256: Brake booster motor pressure too low C12FA: Brake system voltage power supply relay open circuit C12FB: Brake system voltage power supply relay circuit high C1345: Brake pressure control solenoid open current learning not complete C13D9: Brake pressure control solenoid pressure too low C13DA: Brake pressure control solenoid pressure too high C140F: Brake booster motor circuit open C141C (Case 1): Brake booster motor relay output shorted high C141C (Case 2): Brake booster motor freewheeling MOS output shorted high C141C: (Case 3 to 10) Brake booster motor gate voltage output functional C141D: Brake booster motor open circuit C141E: Brake booster motor circuit high C1451: High pressure hydraulic tube air bleeding not complete C1496: Reaction force pressure sensor voltage circuit low C1497: Reaction force pressure sensor voltage circuit high C1498: Servo pressure sensor voltage circuit low C1499: Servo pressure sensor voltage circuit high C149E: Accumulator pressure sensor voltage circuit low C149F: Accumulator pressure sensor voltage circuit high C14B4: Reaction force pressure sensor intermittent/erratic C14C4: Servo pressure sensor intermittent/erratic C14C7 (Case 3 to 9): Brake system voltage circuit low C14CA: Brake system voltage open circuit C14D3: Accumulator pressure sensor intermittent/erratic C14DE: Brake system voltage circuit low C14F3: Brake pressure control solenoid SLA circuit low C14F4: Brake pressure control solenoid SLA circuit high C14FC: Brake pressure control solenoid SLR circuit low C14FD: Brake pressure control solenoid SLR circuit high C1509: Brake pressure control solenoid SSA circuit low C150A: Brake pressure control solenoid SSA circuit high C150C: Brake pressure control solenoid "F" stuck on C150F: Brake pressure control solenoid SGH circuit low C1510: Brake pressure control solenoid SGH circuit high P057A: Brake pedal position sensor invalid data P057C: Brake pedal position sensor open circuit P057D: Brake pedal position sensor circuit high P057E: Brake pedal position sensor intermittent/erratic P05DB: Brake pedal position sensor invalid data P05DD: Brake pedal position sensor open circuit P05DE: Brake pedal position sensor circuit high P05DF: Brake pedal position sensor intermittent/erratic P05E0: Brake pedal position sensor "A"/"B" correlation P05FF: Brake position / reaction force pressure correlation U0129: Lost communication with ECB*_ECU (C-bus)
All of the following conditions are met	A, B, C and D
A. Servo pressure sensor fail	Not detected
B. Brake-by-wire controlled mode	On
C. Either of the following conditions is met	-
Target servo pressure (ABS/TRAC/VSC operation: Off)	0.5 MPa (5.1 kgf/cm², 73 psi) or more
Target servo pressure (ABS/TRAC/VSC operation: On)	1.7 to 3.14 MPa (17.3 to 32.0 kgf/cm², 247 to 455 psi) or more
D. Brake	On

TYPICAL MALFUNCTION THRESHOLDS

C13D9 (Case 1-1)

Both of the following conditions are met	-
Difference between target brake pressure and servo pressure	Higher than 2.7 to 4.14 MPa (27.5 to 42.2 kgf/cm², 392 to 601 psi)
Delay of servo pressure increase	Higher than 0.3 to 4.584 seconds

C13D9 (Case 1-2)

Both of the following conditions are met	-
Difference between target brake pressure and servo pressure	Higher than 1.5 MPa (15.3 kgf/cm², 218 psi)
Delay of servo pressure increase	Higher than 0.3 to 4.584 seconds

C14EE

Servo pressure

0.1 MPa (1 kgf/cm², 15 psi) or less

COMPONENT OPERATING RANGE

C13D9

All of the following conditions are met	-
Servo pressure sensor fail	Not detected
Brake-by-wire controlled mode	On
Brake	On
Servo pressure	0.5 MPa (5.1 kgf/cm², 73 psi) or more
Malfunction criteria	Not met

C14EE

All of the following conditions are met	-
Servo pressure sensor fail	Not detected
Brake-by-wire controlled mode	On
Brake	On
Servo pressure	Higher than 0.1 MPa (1 kgf/cm², 15 psi)

CONFIRMATION DRIVING PATTERN

NOTICE:

When performing the normal judgment procedure, make sure that the driver door is closed and is not opened at any time during the procedure.

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off. [*1]
Wait 4 minutes. [*2]
Turn the ignition switch to ON (READY) and turn the GTS on. [*3]
Depress the brake pedal for 2 seconds, release it and wait 1 second. [*4]
HINT:

[*1] to [*4]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Enter the following menus: Chassis / Brake/EPB / Utility / All Readiness.
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.

CAUTION / NOTICE / HINT

NOTICE:

After replacing the No. 1 skid control ECU (brake booster with master cylinder assembly), perform "Calibration" after performing "Reset Memory".

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PROCEDURE

1.	CUSTOMER PROBLEM ANALYSIS (CHECK CONDITION WHEN MALFUNCTION OCCURRED) AND FREEZE FRAME DATA

(a) Interview the customer to check the vehicle conditions when the brake system warning light (yellow indicator) illuminated.

(b) Using the GTS, check for Freeze Frame Data that is recorded when a DTC is stored.

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Chassis > Brake/EPB > Trouble Codes

HINT:

Freeze Frame Data is only stored once when a DTC is stored.

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake Booster > Clear DTCs

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch off.

CHECK DTC

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

(b) Check if the same DTC is output.

Chassis > Brake Booster > Trouble Codes

Chassis > Brake/EPB > Trouble Codes

Result	Proceed to
Only DTCs C13D909 and/or C14EC00 are output.	A
DTCs other than C13D909 and/or C14EC00 are output.	B

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

4.	CHECK FOR FLUID LEAK

(a) Based on the Freeze Frame Data or interview with the customer, inspect the following items for brake fluid leaks:

The brake lines from the brake booster with master cylinder assembly to each wheel cylinder.
The main body of the brake booster with master cylinder assembly and brake actuator assembly.

OK:

There are no fluid leaks.

REPAIR OR REPLACE APPLICABLE PART

5.	PERFORM AIR BLEEDING

(a) Clear the DTCs.

Chassis > Brake Booster > Clear DTCs

Chassis > Brake/EPB > Clear DTCs

(b) Perform the air bleeding procedure in Bleed Brake System.

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6.	CHECK BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (ACTUATOR SIDE)

(a) Turn the ignition switch off.

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

7.	CHECK HARNESS AND CONNECTOR (VEHICLE SIDE)

(a) Reconnect the A104 No. 1 skid control ECU (brake booster with master cylinder assembly) connector.

(b) Measure the voltage and resistance on the wire harness side.

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OK:

Voltage and resistance readings are all normal.

REPAIR OR REPLACE HARNESS OR CONNECTOR

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch off.

9.	RECONFIRM DTC

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

(b) Check if the same DTC is output.

Chassis > Brake/EPB > Trouble Codes

Result	Proceed to
DTCs C13D909 and C14EC00 are not output.	A
DTCs C13D909 and/or C14EC00 are output.	B

HINT:

If the system returns to normal, it is suspected that a DTC was stored due to a poor connection of a terminal in a connector, air in the system, etc.

USE SIMULATION METHOD TO CHECK

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY