Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001MQLZ
Model Year Start: 2020 Model: RAV4 Prod Date Range: [10/2019 - 12/2021]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ Vacuum Brake Booster): C050C12,C051212; Left Rear Wheel Speed Sensor Circuit Short to Battery; 2020 - 2021 MY RAV4 RAV4 HV [10/2019 - 12/2021]

DTC

C050C12

Left Rear Wheel Speed Sensor Circuit Short to Battery

DTC

C051212

Right Rear Wheel Speed Sensor Circuit Short to Battery

DESCRIPTION

Each speed sensor detects wheel speed and sends signals to the skid control ECU (brake actuator assembly). These signals are used by the ABS control.

The speed sensor detects the magnetic fields of the speed sensor rotor as it rotates and outputs a pulse signal.

The frequency of the pulse varies in accordance with the rotational speed of the speed sensor rotor and the system uses this to determine the wheel speed.

HINT:

The following example shows a pulse signal that is output when the wire harness connectors are connected to the speed sensors and skid control ECU (brake actuator assembly).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C050C12

Left Rear Wheel Speed Sensor Circuit Short to Battery

A short to +B in the speed sensor signal circuit is detected for 0.12 seconds or more.
  • Rear speed sensor LH (rear axle hub and bearing assembly LH)*1
  • Rear speed sensor LH*2
  • Wire harness or connector
  • Skid control sensor wire LH (No. 2 parking brake wire assembly)
  • Skid control ECU (brake actuator assembly)

C051212

Right Rear Wheel Speed Sensor Circuit Short to Battery

A short to +B in the speed sensor signal circuit is detected for 0.12 seconds or more.
  • Rear speed sensor RH (rear axle hub and bearing assembly RH)*1
  • Rear speed sensor RH*2
  • Wire harness or connector
  • Skid control sensor wire RH (No. 1 parking brake wire assembly)
  • Skid control ECU (brake actuator assembly)

*1: for 2WD

*2: for AWD

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.

    Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ 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 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ Vacuum Brake Booster): TEST MODE PROCEDURE

PROCEDURE

1.

CHECK VEHICLE

(a) Check the vehicle specification.

Result

Proceed to

for 2WD

A

for AWD

B
B

GO TO STEP 6

A

2.

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

for LH

*B

for RH

*a

Front view of skid control sensor wire (parking brake wire assembly)

(to Rear Speed Sensor (Rear Axle Hub and Bearing Assembly))

(b) Disconnect the M50 or N58 rear speed sensor (rear axle hub and bearing assembly) 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:

for LH

Tester Connection

Condition

Specified Condition

N58-2 (LA+) - N58-1 (LA-)

Ignition switch ON

11 to 14 V

for RH

Tester Connection

Condition

Specified Condition

M50-2 (RA+) - M50-1 (RA-)

Ignition switch ON

11 to 14 V
OK

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; AXLE AND DIFFERENTIAL: REAR AXLE HUB: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; AXLE AND DIFFERENTIAL: REAR AXLE HUB: REMOVAL

NG

3.

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

for LH

*B

for RH

*a

Front view of wire harness connector

(to Skid Control Sensor Wire (Parking Brake Wire Assembly))

(b) Disconnect the MM3 or NN6 skid control sensor wire (parking brake wire assembly) 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:

for LH

Tester Connection

Condition

Specified Condition

NN6-3 - NN6-4

Ignition switch ON

11 to 14 V

for RH

Tester Connection

Condition

Specified Condition

MM3-3 - MM3-4

Ignition switch ON

11 to 14 V
OK

REPLACE PARKING BRAKE WIRE ASSEMBLY
NG

4.

CHECK HARNESS AND CONNECTOR (PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

(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

for LH

*B

for RH

*a

Front view of wire harness connector

(to Skid Control Sensor Wire (Parking Brake Wire Assembly))

(b) Disconnect the A39 skid control ECU (brake actuator assembly) connector.

(c) Disconnect the MM3 or NN6 skid control sensor wire (parking brake wire 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:

for LH

Tester Connection

Condition

Specified Condition

NN6-4 - Body ground

Always

Below 1.5 V

for RH

Tester Connection

Condition

Specified Condition

MM3-4 - Body ground

Always

Below 1.5 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

CHECK HARNESS AND CONNECTOR (PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

(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.

(b) Disconnect the A39 skid control ECU (brake actuator assembly) connector.

(c) Disconnect the MM3 or NN6 skid control sensor wire (parking brake wire assembly) connector.

(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:

for LH

Tester Connection

Condition

Specified Condition

NN6-3 or A39-39 (RL+) - NN6-4 or A39-23 (RL-)

Always

10 kΩ or higher

for RH

Tester Connection

Condition

Specified Condition

MM3-3 or A39-22 (RR+) - MM3-4 or A39-37 (RR-)

Always

10 kΩ or higher
OK

REPLACE BRAKE ACTUATOR ASSEMBLY 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (w/ Vacuum Brake Booster): REMOVAL 2021 - 2022 MY RAV4 RAV4 HV [08/2020 - 10/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: BRAKE ACTUATOR (w/ Vacuum Brake Booster): REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

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

for LH

*B

for RH

*a

Front view of skid control sensor wire (parking brake wire assembly)

(to Rear Speed Sensor)

(b) Disconnect the M50 or N58 rear speed sensor 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:

for LH

Tester Connection

Condition

Specified Condition

N58-2 (LA+) - N58-1 (LA-)

Ignition switch ON

11 to 14 V

for RH

Tester Connection

Condition

Specified Condition

M50-2 (RA+) - M50-1 (RA-)

Ignition switch ON

11 to 14 V
OK

REPLACE REAR SPEED SENSOR

NG

GO TO STEP 3