DTC C1464: Front Speed Sensor RH Circuit; DTC C1465: Front Speed Sensor LH Circuit [09/2018 - ]: Procedure

CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

Using the Techstream, check for any momentary interruptions in the wire harness and connector corresponding to a DTC.

Refer to CHECK FOR INTERMITTENT PROBLEMS [03/2017 - ]

Chassis > ABS/VSC/TRAC > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FR Speed Open	Front speed sensor RH open detection	Error or Normal	Error: Momentary interruption Normal: Normal	-
FL Speed Open	Front speed sensor LH open detection	Error or Normal	Error: Momentary interruption Normal: Normal	-

Chassis > ABS/VSC/TRAC > Data List

Tester Display
FR Speed Open
FL Speed Open

There are no momentary interruptions.

HINT:

Perform the above inspection before removing the sensor and connector.

Result

Proceed to
OK
NG

Result:

See step 5

Result:

See step 2

READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR)

Select the Data List on the Techstream.

Refer to DATA LIST / ACTIVE TEST [03/2017 - 05/2023] , or refer to DATA LIST / ACTIVE TEST [05/2023 - ]

Chassis > ABS/VSC/TRAC > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FR Wheel Speed	Front speed sensor RH	Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations
FL Wheel Speed	Front speed sensor LH	Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations

Chassis > ABS/VSC/TRAC > Data List

Tester Display
FR Wheel Speed
FL Wheel Speed

Check the speed value output from the speed sensor displayed on the Techstream.

The speed value output from the speed sensor displayed on the Techstream is similar to the speed indicated on the speedometer.

Result

Proceed to
OK
NG

Result:

See step 5

Result:

See step 3

PERFORM TEST MODE INSPECTION (SIGNAL CHECK)

Turn the engine switch off.

Using the Techstream, perform a Test Mode (signal check) inspection sensor check and check that all Test Mode (signal check) inspection items change from incomplete to complete.

Refer to TEST MODE PROCEDURE [03/2017 - 05/2023] , or refer to TEST MODE PROCEDURE [05/2023 - ]

Chassis > ABS/VSC/TRAC > Utility

Tester Display
Signal Check

All Test Mode (signal check) inspection items change from incomplete to complete.

Result

Proceed to
OK
NG

Result:

See step 5

Result:

See step 4

RECONFIRM DTC

Clear the DTCs.
Refer to DTC CHECK / CLEAR [09/2018 - ]

Chassis > ABS/VSC/TRAC > Clear DTCs
Turn the engine switch off.
Start the engine.
Perform a road test.

Check if the same DTC is output.

Refer to DTC CHECK / CLEAR [09/2018 - ]

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Result	Proceed to
DTCs C1464 and C1465 are not output.	A
DTCs C1464 and/or C1465 are output.	B

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - 04/2020] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2020 - 05/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [05/2023 - ]

Result:

See step 8

CHECK FRONT SPEED SENSOR INSTALLATION

Turn the engine switch off.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	Front Speed Sensor
*a	OK
*b	NG

Check the speed sensor installation.

There is no clearance between the sensor and the front steering knuckle.

The installation bolt is tightened properly.

Torque: 8.5 N*m (87 kgf*cm, 75 in.*lbf)

Result

Proceed to
OK
NG

Result:

REPLACE FRONT AXLE HUB SUB-ASSEMBLY. Refer to REMOVAL [03/2017 - 05/2023] , or refer to REMOVAL [05/2023 - 09/2023] , or refer to REMOVAL [09/2023 - ]

Result:

See step 6

INSPECT FRONT SKID CONTROL SENSOR WIRE

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*A	for RH
*B	for LH
*1	Front Skid Control Sensor Wire
*a	Front view of wire harness connector (to Vehicle Side Connector)
*b	Front view of wire harness connector (to Sensor Side Connector)

Make sure that there is no looseness at the locking part and the connecting part of the connectors.
Remove the front skid control sensor wire.

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

Standard Resistance

FOR RH

Tester Connection	Condition	Specified Condition
z36-2 (FR+) - A82-5 (FR+)	Always	Below 1 Ω
z36-2 (FR+) or A82-5 (FR+) - Body ground and other terminals	Always	10 MΩ or higher
z36-1 (FR-) - A82-1 (FR-)	Always	Below 1 Ω
z36-1 (FR-) or A82-1 (FR-) - Body ground and other terminals	Always	10 MΩ or higher

FOR LH

Tester Connection	Condition	Specified Condition
r1-2 (FL+) - Ar1-3	Always	Below 1 Ω
r1-2 (FL+) or Ar1-3 - Body ground and other terminals	Always	10 MΩ or higher
r1-1 (FL-) - Ar1-1	Always	Below 1 Ω
r1-1 (FL-) or Ar1-1 - Body ground and other terminals	Always	10 MΩ or higher

NOTE:

Check the speed sensor signal after replacement.

Refer to TEST MODE PROCEDURE [03/2017 - 05/2023] , or refer to TEST MODE PROCEDURE [05/2023 - ]

Result

Proceed to
OK
NG

Result:

REPLACE FRONT SKID CONTROL SENSOR WIRE. Refer to REMOVAL [03/2017 - ]

Result:

See step 7

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU ASSEMBLY - FRONT SKID CONTROL SENSOR WIRE)

Make sure that there is no looseness at the locking part and the connecting part of the connector.
Disconnect the A8 and A10 skid control ECU assembly connectors.

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

Standard Resistance

FOR RH

Tester Connection	Condition	Specified Condition
A8-22 (FR+) - A82-5 (FR+)	Always	Below 1 Ω
A8-22 (FR+) or A82-5 (FR+) - Body ground	Always	10 MΩ or higher
A8-23 (FR-) - A82-1 (FR-)	Always	Below 1 Ω
A8-23 (FR-) or A82-1 (FR-) - Body ground	Always	10 MΩ or higher

FOR LH

Tester Connection	Condition	Specified Condition
A10-31 (FL+) - Ar1-3	Always	Below 1 Ω
A10-31 (FL+) or Ar1-3 - Body ground	Always	10 MΩ or higher
A10-32 (FL-) - Ar1-1	Always	Below 1 Ω
A10-32 (FL-) or Ar1-1 - Body ground	Always	10 MΩ or higher

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 8

CHECK SPEED SENSOR AND SENSOR ROTOR SERRATIONS

Reconnect the A8 and A10 skid control ECU assembly connectors.

*a	Component with harness connected (Skid Control ECU Assembly)
*b	Normal Signal Waveform

Install the front skid control sensor wire.
Connect an oscilloscope to the front speed sensor terminal of the skid control ECU assembly and body ground.

Check the waveform output when the wheels are rotated.

The same waveform is output from all the sensors and there is no noise or interference in the waveform.

NOTE:

Check the speed sensor signal after cleaning or replacement.

Refer to TEST MODE PROCEDURE [03/2017 - 05/2023] , or refer to TEST MODE PROCEDURE [05/2023 - ]

HINT:

As the vehicle speed (wheel revolution speed) increases, the waveform cycle narrows.
When noise is identified in the waveform on the oscilloscope, the erratic signals are likely due to speed sensor rotor scratches, looseness or attached foreign matter.
The front speed sensor and front speed sensor rotor is incorporated into the front axle hub sub-assembly.
If the front speed sensor and front speed sensor rotor needs to be replaced, replace the front axle hub sub-assembly.

Result

Proceed to
OK
NG

Result:

REPLACE FRONT SKID CONTROL SENSOR WIRE. Refer to REMOVAL [03/2017 - ]

Result:

See step 9

RECONFIRM DTC

Clear the DTCs.
Refer to DTC CHECK / CLEAR [09/2018 - ]

Chassis > ABS/VSC/TRAC > Clear DTCs
Turn the engine switch off.
Start the engine.
Perform a road test.

Check if the same DTC is output.

Refer to DTC CHECK / CLEAR [09/2018 - ]

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Result	Proceed to
DTCs C1464 and/or C1465 are output.	A
DTCs C1464 and C1465 are not output.	B

Result:

REPLACE SKID CONTROL ECU ASSEMBLY. Refer to REMOVAL [03/2017 - 05/2023] , or refer to REMOVAL [05/2023 - ]

Result: