DTC C1466: Rear Speed Sensor RH Circuit; DTC C1467: Rear 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
RR Speed Open	Rear speed sensor RH open detection	Error or Normal	Error: Momentary interruption Normal: Normal	-
RL Speed Open	Rear speed sensor LH open detection	Error or Normal	Error: Momentary interruption Normal: Normal	-

Chassis > ABS/VSC/TRAC > Data List

Tester Display
RR Speed Open
RL 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 (REAR 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
RR Wheel Speed	Rear 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
RL Wheel Speed	Rear 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
RR Wheel Speed
RL 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)

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 C1466 and C1467 are not output.	A
DTCs C1466 and/or C1467 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 9

CHECK REAR SPEED SENSOR INSTALLATION

Turn the engine switch off.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	Rear Speed Sensor
*a	OK
*b	NG

Check the speed sensor installation.

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

The installation bolt is tightened properly.

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

Result

Proceed to
A
B

Result:

INSTALL REAR SPEED SENSOR CORRECTLY. Refer to INSTALLATION [03/2017 - ]

Result:

See step 6

CHECK REAR SPEED SENSOR AND SENSOR ROTOR

Remove the rear speed sensor and the component with the speed sensor rotor.
for Speed Sensor: Refer to REMOVAL [03/2017 - ]

for Speed Sensor Rotor: Refer to REMOVAL [03/2017 - 05/2023] , or refer to REMOVAL [05/2023 - ]

Check the speed sensor tip and speed sensor rotor.

The sensor tip and rotor are free of scratches, oil, and foreign matter.

NOTE:

If there are any ferrous metal filings stuck to the rotor, this will result in a malfunction, so confirm that the rotor is not contaminated with foreign matter before replacing the sensor.
If no damage to the speed sensor tip is found during this inspection, do not replace the speed sensor.
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 - ]

Result

Proceed to
OK
NG

Result:

CLEAN OR REPLACE REAR SPEED SENSOR OR COMPONENT WITH SENSOR ROTOR

Result:

See step 7

INSPECT SKID CONTROL SENSOR WIRE

Install the rear speed sensor and the component with the speed sensor rotor.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*A	for RH
*B	for LH
*1	Front view of 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 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
z35-1 (RR+) - X121-3 (RR+)	Always	Below 1 Ω
z35-1 (RR+) - X121-4 (RR-)	Always	10 MΩ or higher
z35-1 (RR+) or X121-3 (RR+) - Body ground	Always	10 MΩ or higher
z35-2 (RR-) - X121-4 (RR-)	Always	Below 1 Ω
z35-2 (RR-) - X121-3 (RR+)	Always	10 MΩ or higher
z35-2 (RR-) or X121-4 (RR-) - Body ground	Always	10 MΩ or higher

FOR LH

Tester Connection	Condition	Specified Condition
t1-2 (RL+) - tX2-3	Always	Below 1 Ω
t1-2 (RL+) - tX2-4	Always	10 MΩ or higher
t1-2 (RL+) or tX2-3 - Body ground	Always	10 MΩ or higher
t1-1 (RL-) - tX2-4	Always	Below 1 Ω
t1-1 (RL-) - tX2-3	Always	10 MΩ or higher
t1-1 (RL-) or tX2-4 - Body ground	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 SKID CONTROL SENSOR WIRE. Refer to REMOVAL [03/2017 - 05/2023] , or refer to REMOVAL [05/2023 - ]

Result:

See step 8

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

Make sure that there is no looseness at the locking part and the connecting part of the connector.
Disconnect the A9 and A11 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
A11-22 (RR+) - X121-3 (RR+)	Always	Below 1 Ω
A11-22 (RR+) or X121-3 (RR+) - Body ground	Always	10 MΩ or higher
A11-21 (RR-) - X121-4 (RR-)	Always	Below 1 Ω
A11-21 (RR-) or X121-4 (RR-) - Body ground	Always	10 MΩ or higher

FOR LH

Tester Connection	Condition	Specified Condition
A9-34 (RL+) - tX2-3	Always	Below 1 Ω
A9-34 (RL+) or tX2-3 - Body ground	Always	10 MΩ or higher
A9-35 (RL-) - tX2-4	Always	Below 1 Ω
A9-35 (RL-) or tX2-4 - Body ground	Always	10 MΩ or higher

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 9

CHECK SPEED SENSOR AND SENSOR ROTOR SERRATIONS

Reconnect the A9 and A11 skid control ECU assembly connectors.

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

Install the rear skid control sensor wire.
Connect an oscilloscope to the rear 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 rear speed sensor rotor is incorporated into the rear axle hub and bearing assembly.
If the rear speed sensor rotor needs to be replaced, replace the rear axle hub and bearing assembly.

Result

Proceed to
OK
NG

Result:

CLEAN OR REPLACE REAR SPEED SENSOR OR COMPONENT WITH SENSOR ROTOR

Result:

See step 10

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 C1466 and/or C1467 are output.	A
DTCs C1466 and C1467 are not output.	B

Result:

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

Result: