Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM1000000027LPS
Model Year Start: 2023 Model: RAV4 Prod Date Range: [10/2022 -           ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C050012; Left Front Wheel Speed Sensor Circuit Short to Battery; 2023 - 2024 MY RAV4 RAV4 HV [10/2022 -        ]

DTC

C050012

Left Front Wheel Speed Sensor Circuit Short to Battery

DESCRIPTION

The speed sensor detects wheel speed and sends the appropriate signals to the No. 2 skid control ECU (brake actuator assembly). These signals are used for brake control.

Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change when the rotors turn.

Each speed sensor detects that magnetic change and sends a pulse signal to the No. 2 skid control ECU (brake actuator assembly).

HINT:

When the connectors between the speed sensor and No. 2 skid control ECU (brake actuator assembly) are connected, the following waveform is output.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

C050012

Left Front Wheel Speed Sensor Circuit Short to Battery

The speed sensor short signal is ON continuously for 0.5 seconds or more.

  • Front speed sensor LH
  • Wire harness and connector
  • No. 2 skid control ECU (brake actuator assembly)

Comes on

  • SAE Code: C0503
  • Output ECU: No. 2 skid control ECU (brake actuator assembly)

MONITOR DESCRIPTION

The No. 2 skid control ECU (brake actuator assembly) monitors the current or power supply voltage of the speed sensor. If the power supply voltage or output current is excessively high, the MIL is illuminated and a DTC is stored.

MONITOR STRATEGY

Related DTCs

C0503: Wheel speed sensor (FL) voltage circuit high

Required Sensors/Components(Main)

Speed sensor

No. 2 skid control ECU (brake actuator assembly)

Required Sensors/Components(Related)

No. 2 skid control ECU (brake actuator assembly)

Frequency of Operation

Continuous

Duration

0.054 seconds: C0503 (Case 2)

0.528 seconds: C0503 (Case 1)

MIL Operation

Immediately

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Case 1

Monitor runs whenever the following DTCs are not stored

C0501 (Case 4): Wheel speed sensor (FL) range/performance

C0502: Wheel speed sensor (FL) voltage circuit open

C137D: Brake system voltage input out of range high

C14E1: Wheel speed sensor (FL) voltage circuit low

Both of the following conditions are met

-

Command to wheel speed sensor power supply

On

+BS voltage

17.4 V or less

Case 2

Monitor runs whenever the following DTCs are not stored

None

Power supply for wheel speed sensor

Off

TYPICAL MALFUNCTION THRESHOLDS

Case 1

Wheel speed sensor current

0.034 A or more

Case 2

Either of the following conditions is met

-

Power supply voltage for wheel speed sensor

Higher than 4.1 V

Wheel speed sensor current

4 mA or less

COMPONENT OPERATING RANGE

Case 1

Wheel speed sensor current

Less than 0.034 A

Case 2

All of the following conditions are met

-

Power supply for wheel speed sensor

Off

ECU state

Pre main

ABS pump motor fail (C052B, C052D, C052E, C055B)

Not detected

Brake system voltage fail (C143B, C143C)

Not detected

ABS hold solenoid fail (C0597)

Not detected

Wheel speed sensor fail (C0509, C0503, C0515, C050F)

Not detected

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.
  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off.
  5. Turn the ignition switch to ON (READY) and turn the GTS on.
  6. Wait for 2 seconds or more. [*]

    HINT:

    [*]: Normal judgment procedure.

    The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  7. Enter the following menus: Chassis / Brake/EPB / Utility / All Readiness.
  8. 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

CAUTION / NOTICE / HINT

NOTICE:

  • After replacing the No. 2 skid control ECU (brake actuator assembly), perform "Calibration" after performing "Reset Memory".

    Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY

  • After replacing or removing and installing a speed sensor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.

    Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): TEST MODE PROCEDURE

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT)

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

OK:

The connector is securely connected.

*a

Front view of wire harness connector

(to Front Speed Sensor LH)

(b) Disconnect the A92 front speed sensor LH connector.

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

OK:

No deformation or corrosion.

(d) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A92-1 (FL+) - A92-2 (FL-)

Ignition switch ON

11 to 14 V

OK

REPLACE FRONT SPEED SENSOR LH

NG

2.

CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT)

(a) Turn the ignition switch off.

*a

Front view of wire harness connector

(to Front Speed Sensor LH)

(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.

(c) Disconnect the A105 No. 2 skid control ECU (brake actuator assembly) connector.

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

OK:

No deformation or corrosion.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A92-2 (FL-) - Body ground

Always

Below 1.5 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK HARNESS AND CONNECTOR (FRONT SPEED SENSOR LH - BRAKE ACTUATOR ASSEMBLY)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A92-1 (FL+) or A105-22 (FL+) - A92-2 (FL-) or A105-21 (FL-)

Always

10 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (w/o Vacuum Brake Booster): REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (w/o Vacuum Brake Booster): REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR