BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C142771; ABS Pump Motor Actuator Stuck; 2022 - 2024 MY RAV4 RAV4 HV [12/2021

Last Modified: 01-30-2024	6.11:8.1.0	Doc ID: RM10000000214QU
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): C142771; ABS Pump Motor Actuator Stuck; 2022 - 2024 MY RAV4 RAV4 HV [12/2021 - ]

DTC

C142771

ABS Pump Motor Actuator Stuck

DESCRIPTION

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Note
C142771	ABS Pump Motor Actuator Stuck	Actuator pump motor does not operate properly.	Wire harness and connector Brake actuator assembly (pump motor) Brake actuator assembly (pump motor circuit)	Comes on	SAE Code: C1427 Output ECU: No. 2 skid control ECU (brake actuator assembly)

MONITOR DESCRIPTION

When the voltage of the ABS pump motor is less than a certain value, the No. 2 skid control ECU (brake actuator assembly) judges that the motor is not rotating, the MIL is illuminated and a DTC is stored.

MONITOR STRATEGY

Related DTCs	C1427: ABS pump motor stuck
Required Sensors/Components(Main)	No. 2 skid control ECU (brake actuator assembly)
Required Sensors/Components(Related)	No. 2 skid control ECU (brake actuator assembly)
Frequency of Operation	Continuous or during initial checking
Duration	2 times
MIL Operation	Immediately
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	C052B: ABS pump motor performance C052D: ABS pump motor circuit high C052E: ABS pump motor open circuit C055B: ABS pump motor voltage circuit low C0597: (Case 1) ABS hold solenoid circuit stuck C0597: (Case 2 to 5) ABS hold solenoid performance C1241: Brake system voltage input out of range low C12A7: ABS hold solenoid (FL) circuit low C12A8: ABS hold solenoid (FL) circuit high C12B2: ABS release solenoid (FL) circuit low C12B3: ABS release solenoid (FL) circuit high C12BD: ABS hold solenoid (FR) circuit low C12BE: ABS hold solenoid (FR) circuit high C12C8: ABS release solenoid (FR) circuit low C12C9: ABS release solenoid (FR) circuit high C12D3: ABS hold solenoid (RL) circuit low C12D4: ABS hold solenoid (RL) circuit high C12DE: ABS release solenoid (RL) circuit low C12DF: ABS release solenoid (RL) circuit high C12E9: ABS hold solenoid (RR) circuit low C12EA: ABS hold solenoid (RR) circuit high C12F4: ABS release solenoid (RR) circuit low C12F5: ABS release solenoid (RR) circuit high C12F6: ABS hold solenoid other functional C12F7: ABS hold solenoid other functional C137C: Brake system voltage input out of range low C137D: Brake system voltage input out of range high C13BF: SM solenoid other functional C13C2: SM1 solenoid circuit low C13C3: SM1 solenoid circuit high C13CB: SM2 solenoid circuit low C13CC: SM2 solenoid circuit high C143B: Brake system voltage solenoid relay stuck C143C: Brake system voltage open circuit
Both of the following conditions are met	A and B
A. ECU state	Initial check
B. Following condition is met	0.002 seconds or more
After command to ABS motor relay on to off detection	Met

TYPICAL MALFUNCTION THRESHOLDS

ABS pump motor voltage

Less than 1.3 V for 0.022 seconds or more within 0.024 seconds

COMPONENT OPERATING RANGE

All of the following conditions are met	A, B and C
A. ECU state	Initial check
B. Following condition is met	0.002 seconds or more
After command to ABS motor relay on to off detection	Met
C. ABS pump motor voltage	Less than 1.3 V for less than 0.022 seconds within 0.024 seconds

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.
Turn the ignition switch to ON (READY) and turn the GTS on.
Wait for 5 seconds or more. [*]
HINT:

[*]: 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.

WIRING DIAGRAM

Refer to DTCs C052C14, C052C16, C052C17, C052C49 and C052F14.

Click here

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.
After replacing the No. 2 skid control ECU (brake actuator assembly), perform "Calibration" after performing "Reset Memory".
Click here

PROCEDURE

1.	PERFORM ACTIVE TEST USING GTS (MOTOR RELAY)

(a) Check the operating sound of the pump motor when operating it using the GTS.

Chassis > Brake/EPB > Active Test

Tester Display

Measurement Item

Control Range

Restrict Condition

Diagnostic Note

Motor Relay

ABS motor relay

OFF / ON

Vehicle condition: Vehicle stopped

HINT:

To protect this Actuator and Solenoid, this test will only last 5 seconds.

Operating sound of motor can be heard

Chassis > Brake/EPB > Active Test

Tester Display
Motor Relay

Result	Proceed to
Operating sound is heard.	A
Operating sound is not heard.	B

GO TO STEP 4

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch off.

3.	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
DTC C142771 is not output.	A
DTC C142771 is output.	B

HINT:

If a speed signal of 20 km/h (12 mph) or more is input to the No. 2 skid control ECU (brake actuator assembly) with the ignition switch turned to ON and the stop light switch assembly off, the ECU performs self-diagnosis of the pump motor circuit.
If the normal system code is output (no DTCs are output), slightly jiggle the connectors, wire harness, and fuses of the No. 2 skid control ECU (brake actuator assembly).
If any DTCs are output while jiggling a connector or wire harness of the No. 2 skid control ECU (brake actuator assembly), inspect and repair the connector or wire harness.
If no DTCs were output when reconfirming DTCs, checking for intermittent problems is necessary because it is suspected that the original DTCs were stored due to the poor connection of a connector terminal.

USE SIMULATION METHOD TO CHECK

REPLACE BRAKE ACTUATOR ASSEMBLY

4.	CHECK HARNESS AND CONNECTOR (GND2 TERMINAL)

(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.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A105-30 (GND2) - Body ground	1 minute or more after disconnecting the cable from the negative (-) auxiliary battery terminal	Below 1 Ω

REPLACE BRAKE ACTUATOR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR