Toyota Corolla Cross: Left Front Wheel Speed Sensor Circuit Intermittent (C05001F)

DESCRIPTION

Refer to DTC C050012

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Note
C05001F	Left Front Wheel Speed Sensor Circuit Intermittent	The speed sensor signal is excessively noisy. The calculated change in wheel speed is more than 980 m/s2 for 5*1 or 20*2 seconds or more. The calculated change in wheel speed fluctuates between more than 500 m/s2 and less than -500 m/s2 for 5*1 or 20*2 seconds or more. When the vehicle speed is low, excessive noise in the speed sensor pulse signal is detected 3 times or more within 0.005 seconds for 5*1 or 20*2 seconds or more.	Front speed sensor LH Front speed sensor rotor LH (front axle hub sub-assembly LH)	Comes on	Brake/EPB	SAE Code: C0504 (Case 1 and 2) Output ECU: Skid control ECU (brake actuator assembly)

• *1: The stop light switch assembly is OFF.
• *2: The stop light switch assembly is ON.

MONITOR DESCRIPTION

C0504 (Case 1):

• When any of the following conditions are met, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
  • The acceleration (change over a certain amount of time) of the respective wheel is more than a certain amount.
  • The amplitude of acceleration (change over a certain amount of time) is a certain amount or more.
  • Noise in the respective wheel speed pulse occurs a certain number of times or more.

C0504 (Case 2):

• If extremely large noise occurs in the output signal from the speed sensor, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.

MONITOR STRATEGY

*1: Influence of noise is recognized at 3 or 4 wheel speed sensor). *2: The stop light switch assembly is OFF. *3: The stop light switch assembly is ON.
Related DTCs	C0504 (Case 1): Wheel speed sensor noise monitoring (FL) C0504 (Case 2): Wheel speed sensor direct memory access buffer noise monitoring for FL
Required Sensors/Components(Main)	Speed sensor Skid control ECU (brake actuator assembly)
Required Sensors/Components(Related)	Skid control ECU (brake actuator assembly)
Frequency of Operation	Continuous
Duration	0.03 seconds: C0504 (Case 2) 1 second: C0504 (Case 1)*1 5 seconds: C0504 (Case 1)*2 20 seconds: C0504 (Case 1)*3
MIL Operation	2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	TMC's intellectual property
Other conditions belong to TMC's intellectual property	-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

-

COMPONENT OPERATING RANGE

TMC's intellectual property

-

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 3 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.

   *: Electric Parking Brake System

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.

CAUTION / NOTICE / HINT

NOTICE:

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 54 km/h (34 mph) or more for 3 seconds or more to clear the warning lights.

PROCEDURE

1.	CHECK FRONT SPEED SENSOR LH (CHECK FOR FOREIGN MATTER)

(a) Remove the front speed sensor LH.

Click here

(b) Check the front speed sensor LH.

OK:

The front speed sensor LH tip is free of oil and foreign matter.

HINT:

If foreign matter of 1 mm (0.03937 in.) x 1 mm (0.03937 in.) or more is adhered to the front speed sensor LH, this DTC may be stored.

NG

GO TO STEP 7

OK

2.	CHECK FRONT SPEED SENSOR ROTOR LH (CHECK FOR FOREIGN MATTER)

(a) Remove the component with the front speed sensor rotor LH.

Click here

(b) Check the front speed sensor rotor LH.

OK:

The front speed sensor rotor LH is free of oil and foreign matter.

HINT:

• If foreign matter of 1 mm (0.03937 in.) x 1 mm (0.03937 in.) or more is adhered to the front speed sensor rotor LH, this DTC may be stored.
• The front speed sensor rotor LH is incorporated into the front axle hub sub-assembly LH.

  If the front speed sensor rotor LH needs to be replaced, replace it together with the front axle hub sub-assembly LH.

OK

REPLACE FRONT SPEED SENSOR LH AND FRONT SPEED SENSOR ROTOR LH for front speed sensor LH: Click here for front speed sensor rotor LH: Click here

NG

3.	CLEAN FRONT SPEED SENSOR ROTOR LH

(a) Clean the front speed sensor rotor LH.

NOTICE:

Do not use parts cleaner when cleaning the front speed sensor rotor LH.

NEXT

4.

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch to off.

NEXT

5.	PERFORM DEALER MODE (SIGNAL CHECK) INSPECTION (SPEED SENSOR CHECK)

(a) Using the GTS, perform a Dealer Mode (Signal Check) inspection sensor check and check that speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.

Chassis > Brake/EPB > Utility

Tester Display
Signal Check

OK:

Speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.

HINT:

The front speed sensor rotor LH is incorporated into the front axle hub sub-assembly LH.

If the front speed sensor rotor LH needs to be replaced, replace it together with the front axle hub sub-assembly LH.

NG

REPLACE FRONT SPEED SENSOR LH AND FRONT SPEED SENSOR ROTOR LH for front speed sensor LH: Click here for front speed sensor rotor LH: Click here

OK

6.	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

HINT:

The front speed sensor rotor LH is incorporated into the front axle hub sub-assembly LH.

If the front speed sensor rotor LH needs to be replaced, replace it together with the front axle hub sub-assembly LH.

Result	Proceed to
C05001F is not output	A
C05001F is output	B

A

END

B

REPLACE FRONT SPEED SENSOR LH AND FRONT SPEED SENSOR ROTOR LH for front speed sensor LH: Click here for front speed sensor rotor LH: Click here

7.	CLEAN FRONT SPEED SENSOR LH

(a) Clean the front speed sensor LH.

NOTICE:

When cleaning the front speed sensor LH, make sure to clean the installation hole before installation.

NEXT

8.

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch to off.

NEXT

9.	PERFORM DEALER MODE (SIGNAL CHECK) INSPECTION (SPEED SENSOR CHECK)

(a) Using the GTS, perform a Dealer Mode (Signal Check) inspection sensor check and check that speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.

Chassis > Brake/EPB > Utility

Tester Display
Signal Check

OK:

Speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.

NG

GO TO STEP 2

OK

10.	RECONFIRM DTC

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

Chassis > Brake/EPB > Trouble Codes

Result	Proceed to
C05001F is not output	A
C05001F is output	B

A

END

B

GO TO STEP 2

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