BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C050014; Left Front Wheel Speed Sensor Circuit Short to Ground or Open; 2022 - 2024 MY RAV4 RAV4 HV [12/2021

Last Modified: 01-30-2024	6.11:8.1.0	Doc ID: RM10000000214OV
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): C050014; Left Front Wheel Speed Sensor Circuit Short to Ground or Open; 2022 - 2024 MY RAV4 RAV4 HV [12/2021 - ]

DTC

C050014

Left Front Wheel Speed Sensor Circuit Short to Ground or Open

DESCRIPTION

Refer to DTC C050012.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Note
C050014	Left Front Wheel Speed Sensor Circuit Short to Ground or Open	An open in the speed sensor signal circuit continues 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: C0502 Output ECU: No. 2 skid control ECU (brake actuator assembly)

MONITOR DESCRIPTION

The No. 2 skid control ECU (brake actuator assembly) monitors the output of the speed sensor. When the output current of the speed sensor is excessively low, the MIL is illuminated and a DTC is stored.

MONITOR STRATEGY

Related DTCs	C0502: Wheel speed sensor (FL) voltage circuit open
Required Sensors/Components(Main)	Speed sensor
Required Sensors/Components(Related)	No. 2 skid control ECU (brake actuator assembly) Speed sensor
Frequency of Operation	Continuous
Duration	0.528 seconds
MIL Operation	Immediately
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	C0501 (Case 4): Wheel speed sensor (FL) range/performance C0503: Wheel speed sensor (FL) voltage circuit high C137D: Brake system voltage input out of range high C14E1: Wheel speed sensor (FL) voltage circuit low
All of the following conditions are met	-
+BS voltage	17.4 V or less
Command to wheel speed sensor power supply	On
Vehicle speed sensor supply voltage state	Valid
Wheel speed sensor current	Less than 0.034 A

TYPICAL MALFUNCTION THRESHOLDS

Wheel speed sensor current

0.004 A or less

COMPONENT OPERATING RANGE

Wheel speed sensor current

Higher than 0.004 A

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 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.
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 DTC C050012.

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CAUTION / NOTICE / HINT

NOTICE:

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

1.	READ VALUE USING GTS (MOMENTARY INTERRUPTION)

(a) Select the line graph display on the GTS.

(b) Check for any momentary interruption in the wire harness and connector.

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Chassis > Brake/EPB > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

FL Speed Open

Momentary interruption of front speed sensor LH pulse input to ECU

Normal / Under intermittent

Normal: Normal

Under intermittent: Momentary interruption

FL Speed Sensor Voltage Open

Front speed sensor LH voltage open detection

Normal / Under intermittent

Normal: Normal

Under intermittent: Momentary interruption

Chassis > Brake/EPB > Data List

Tester Display
FL Speed Open
FL Speed Sensor Voltage Open

OK:

Normal (There are no momentary interruptions.)

NOTICE:

Perform the above inspection before removing the sensor and connector.

USE SIMULATION METHOD TO CHECK

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

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

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

OK:

No deformation or corrosion.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A92-1 (FL+) - A105-22 (FL+)	Always	Below 1 Ω
A92-1 (FL+) or A105-22 (FL+) - Body ground	Always	10 kΩ or higher
A92-2 (FL-) - A105-21 (FL-)	Always	Below 1 Ω
A92-2 (FL-) or A105-21 (FL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT BRAKE ACTUATOR ASSEMBLY (SENSOR POWER SOURCE CIRCUIT)

(a) Reconnect the A105 No. 2 skid control ECU (brake actuator assembly) connector.

*a	Front view of wire harness connector (to Front Speed Sensor LH)

(b) Turn the ignition switch to ON.

Standard Voltage:

Tester Connection	Condition	Specified Condition
A92-1 (FL+) - Body ground	Ignition switch ON	11 to 14 V

REPLACE FRONT SPEED SENSOR LH

REPLACE BRAKE ACTUATOR ASSEMBLY