BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ Vacuum Brake Booster): C050C23,C051223; Left Rear Wheel Speed Sensor Signal Stuck Low; 2019 - 2024 MY RAV4 RAV4 HV [11/2018

Last Modified: 01-30-2024	6.11:8.1.0	Doc ID: RM100000001EA9Y
Model Year Start: 2019	Model: RAV4	Prod Date Range: [11/2018 - ]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ Vacuum Brake Booster): C050C23,C051223; Left Rear Wheel Speed Sensor Signal Stuck Low; 2019 - 2024 MY RAV4 RAV4 HV [11/2018 - ]

DTC

C050C23

Left Rear Wheel Speed Sensor Signal Stuck Low

DTC

C051223

Right Rear Wheel Speed Sensor Signal Stuck Low

DESCRIPTION

Refer to DTC C050C12

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C050C23	Left Rear Wheel Speed Sensor Signal Stuck Low	When the vehicle is driven from 0 km/h to 12 km/h (0 mph to 7 mph), the wheel speed is 1.8 km/h (1.1 mph) or less for 0.6 seconds or more. When the wheel speed has not exceeded 1.8 km/h (1.1 mph), the vehicle speed reaches 18 km/h (11 mph). When the vehicle speed and wheel speed are both 43.2 km/h (26.8 mph) or more, the pulse signal is not detected for 0.08 seconds or more.	Rear speed sensor LH (rear axle hub and bearing assembly LH)1 Rear speed sensor LH2 Speed sensor installation*2
C051223	Right Rear Wheel Speed Sensor Signal Stuck Low	When the vehicle is driven from 0 km/h to 12 km/h (0 mph to 7 mph), the wheel speed is 1.8 km/h (1.1 mph) or less for 0.6 seconds or more. When the wheel speed has not exceeded 1.8 km/h (1.1 mph), the vehicle speed reaches 18 km/h (11 mph). When the vehicle speed and wheel speed are both 43.2 km/h (26.8 mph) or more, the pulse signal is not detected for 0.08 seconds or more.	Rear speed sensor RH (rear axle hub and bearing assembly RH)1 Rear speed sensor RH2 Speed sensor installation*2

*1: for 2WD

*2: for AWD

DTC Detection Conditions: C050C23

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3
Diagnosis Condition	The vehicle is driven from 0 km/h to 12 km/h (0 mph to 7 mph).	○	-	-
	The vehicle speed reaches 18 km/h (11 mph).	-	○	-
	The vehicle speed and wheel speed are both 43.2 km/h (26.8 mph) or more.	-	-	○
Malfunction Status	The wheel speed is 1.8 km/h (1.1 mph) or less.	○	-	-
	The wheel speed has not exceeded 1.8 km/h (1.1 mph).	-	○	-
	The pulse signal is not detected.	-	-	○
Detection Time		0.6 seconds or more.	-	0.08 seconds or more.
Number of Trips		1 trip	1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

DTC Detection Conditions: C051223

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3
Diagnosis Condition	The vehicle is driven from 0 km/h to 12 km/h (0 mph to 7 mph).	○	-	-
	The vehicle speed reaches 18 km/h (11 mph).	-	○	-
	The vehicle speed and wheel speed are both 43.2 km/h (26.8 mph) or more.	-	-	○
Malfunction Status	The wheel speed is 1.8 km/h (1.1 mph) or less.	○	-	-
	The wheel speed has not exceeded 1.8 km/h (1.1 mph).	-	○	-
	The pulse signal is not detected.	-	-	○
Detection Time		0.6 seconds or more.	-	0.08 seconds or more.
Number of Trips		1 trip	1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

CAUTION / NOTICE / HINT

NOTICE:

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

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Procedure to Clear Warning Lights (When not Clearing DTCs)

Procedure
Repair or replacement. Turn the ignition switch to ON. Drive the vehicle at 2 km/h (1 mph) or more to clear the warning lights.

PROCEDURE

1.	CHECK FREEZE FRAME DATA (WHEEL SPEED)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Select a DTC to display the Freeze Frame Data.

(e) Read the freeze frame data of DTC C050C23 or C051223.

Chassis > Brake/EPB

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FR Wheel Speed	Front wheel speed sensor RH reading	Min.: 0.0 km/h (0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
FL Wheel Speed	Front wheel speed sensor LH reading	Min.: 0.0 km/h (0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
RR Wheel Speed	Rear wheel speed sensor RH reading	Min.: 0.0 km/h (0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations
RL Wheel Speed	Rear wheel speed sensor LH reading	Min.: 0.0 km/h (0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0.0 mph)	When driving at constant speed: No large fluctuations

Chassis > Brake/EPB > DTC(C050C23) > Freeze Frame Data

Tester Display
FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel Speed

Chassis > Brake/EPB > DTC(C051223) > Freeze Frame Data

Tester Display
FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel Speed

Result	Proceed to
The value of RL Wheel Speed is 2 km/h (1 mph) or less when all other values are 12 km/h (7 mph) or more.	A
The value of RR Wheel Speed is 2 km/h (1 mph) or less when all other values are 12 km/h (7 mph) or more.	A
The value of RL Wheel Speed is 2 km/h (1 mph) or less when all other values are 43 km/h (27 mph) or more.	B
The value of RR Wheel Speed is 2 km/h (1 mph) or less when all other values are 43 km/h (27 mph) or more.	B

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

2.	READ VALUE USING TECHSTREAM (WHEEL SPEED)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

Chassis > Brake/EPB > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

RR Wheel Speed

Rear wheel speed sensor RH reading

Min.: 0.0 km/h (0.0 mph)

Max.: 6553.5 km/h (4072 mph)

Vehicle stopped: 0.0 km/h (0.0 mph)

When driving at constant speed: No large fluctuations

RL Wheel Speed

Rear wheel speed sensor LH reading

Min.: 0.0 km/h (0.0 mph)

Max.: 6553.5 km/h (4072 mph)

Vehicle stopped: 0.0 km/h (0.0 mph)

When driving at constant speed: No large fluctuations

Chassis > Brake/EPB > Data List

Tester Display
RR Wheel Speed
RL Wheel Speed

(d) Start the engine and perform a road test.

(e) Check that the value of Wheel Speed changes in accordance with vehicle speed when accelerating from 0 km/h to 20 km/h (0 mph to 12 mph).

OK:

The value of Wheel Speed changes in accordance with vehicle speed.

HINT:

If the result of the road test is within the specified range, it is possible that this DTC was stored due to a particular situation such as brake drag, wheelspin or wheel lockup.

USE SIMULATION METHOD TO CHECK

NG (for 2WD)

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

NG (for AWD)

3.	CHECK REAR SPEED SENSOR INSTALLATION

(a) Check the rear speed sensor installation.

OK:

There is no clearance between the rear speed sensor and the rear axle carrier.

The installation bolt is tightened properly.

*1	Front Speed Sensor
*a	Correct
*b	Incorrect
*c	No clearance

REPLACE REAR SPEED SENSOR

REINSTALL OR REPLACE REAR SPEED SENSOR