DTC C1273-73: Low Output Signal of Rear Speed Sensor RH (Test Mode DTC); DTC C1274-74: Low Output Signal of Rear Speed Sensor LH (Test Mode DTC); DTC C1466-33: Rear Speed Sensor RH Circuit; DTC C1467-34: Rear Speed Sensor LH Circuit [10/2014 - 09/2016]: 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 [10/2014 - ]

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	Normal: Normal	Error: Momentary interruption
RL Speed Open	Rear speed sensor LH open detection	Error or Normal	Normal: Normal	Error: Momentary interruption

Chassis > ABS/VSC/TRAC > Data List

Tester Display
RR Speed Open
RL Speed Open

Normal (There are no momentary interruptions.)

HINT:

Perform the above inspection before removing the sensor and connector.

Result

Proceed to
OK
NG (for AWD)
NG (for 2WD)

Result:

NG (for AWD)

See step 5

Result:

NG (for 2WD)

See step 14

Result:

See step 2

READ VALUE USING TECHSTREAM (REAR SPEED SENSOR)

Select the Data List on the Techstream.

Refer to DATA LIST / ACTIVE TEST [10/2014 - 09/2017]

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.

HINT:

Factors that affect the indicated vehicle speed include tire size, tire inflation, and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using a speedometer tester (calibrated chassis dynamometer). For details about testing and the margin of error, see the reference chart.

Refer to OPERATION CHECK [10/2014 - ]

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 (for AWD)
NG (for 2WD)

Result:

NG (for AWD)

See step 5

Result:

NG (for 2WD)

See step 14

Result:

See step 3

PERFORM TEST MODE INSPECTION (SIGNAL CHECK)

Turn the power switch off.

Perform the sensor check in Test Mode Procedure.

Refer to TEST MODE PROCEDURE [10/2014 - 09/2016]

Chassis > ABS/VSC/TRAC > Utility

Tester Display
Signal Check

All Test Mode DTCs are cleared.

Result

Proceed to
OK
NG (for AWD)
NG (for 2WD)

Result:

NG (for AWD)

See step 5

Result:

NG (for 2WD)

See step 14

Result:

See step 4

RECONFIRM DTC

Turn the power switch off.
Clear the DTCs.
Refer to DTC CHECK / CLEAR [10/2014 - 05/2019]

Chassis > ABS/VSC/TRAC > Clear DTCs
Turn the power switch on (READY).
Perform a road test.

Check if the same DTC is output.

Refer to DTC CHECK / CLEAR [10/2014 - 05/2019]

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Result	Proceed to
DTCs C1466/33 and C1467/34 are not output.	A
DTCs C1466/33 and/or C1467/34 are output. (for AWD)	B
DTCs C1466/33 and/or C1467/34 are output. (for 2WD)	C

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

Refer to PROBLEM SYMPTOMS TABLE [10/2014 - 05/2019]

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]

Result:

See step 10

Result:

See step 19

CHECK REAR SPEED SENSOR INSTALLATION

Turn the power switch off.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	No clearance
*b	OK
*c	NG

Check the speed sensor installation.

Refer to INSTALLATION [10/2014 - 07/2020]

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

The installation bolt is tightened properly.

Result

Proceed to
OK
NG

Result:

INSTALL REAR SPEED SENSOR CORRECTLY. Refer to INSTALLATION [10/2014 - 07/2020]

Result:

See step 6

CHECK REAR SPEED SENSOR TIP

Remove the rear speed sensor.
Refer to REMOVAL [10/2014 - 07/2020]

Check the rear speed sensor tip.

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

NOTE:

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 [10/2014 - 09/2016]

Result

Proceed to
OK
NG

Result:

CLEAN OR REPLACE REAR SPEED SENSOR

Result:

See step 7

CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - REAR SPEED SENSOR)

Install the rear speed sensor.
Refer to INSTALLATION [10/2014 - 07/2020]
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
Disconnect the A57 skid control ECU (brake booster with master cylinder assembly) connector.
Disconnect the P14 or Q8 rear speed sensor connector.

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

Standard Resistance

FOR RH

Tester Connection	Condition	Specified Condition
A57-22 (RR+) - P14-1 (RR+)	Always	Below 1 Ω
A57-22 (RR+) or P14-1 (RR+) - Body ground	Always	10 kΩ or higher
A57-9 (RR-) - P14-2 (RR-)	Always	Below 1 Ω
A57-9 (RR-) or P14-2 (RR-) - Body ground	Always	10 kΩ or higher

FOR LH

Tester Connection	Condition	Specified Condition
A57-20 (RL+) - Q8-1 (RL+)	Always	Below 1 Ω
A57-20 (RL+) or Q8-1 (RL+) - Body ground	Always	10 kΩ or higher
A57-7 (RL-) - Q8-2 (RL-)	Always	Below 1 Ω
A57-7 (RL-) or Q8-2 (RL-) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 8

INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SENSOR OUTPUT)

Reconnect the A57 skid control ECU (brake booster with master cylinder assembly) connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*A	for RH
*B	for LH
*a	Front view of wire harness connector (to Rear Speed Sensor)

Turn the power switch on (IG).

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

Standard Voltage

FOR RH

Tester Connection	Switch Condition	Specified Condition
P14-1 (RR+) - Body ground	Power switch on (IG)	5.7 to 14 V

FOR LH

Tester Connection	Switch Condition	Specified Condition
Q8-1 (RL+) - Body ground	Power switch on (IG)	5.7 to 14 V

Result

Proceed to
OK
NG

Result:

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to REMOVAL [10/2014 - 09/2015] , or refer to REMOVAL [09/2015 - 05/2019]

Result:

See step 9

RECONFIRM DTC

Turn the power switch off.
Reconnect the P14 or Q8 rear speed sensor connector.
Clear the DTCs.
Refer to DTC CHECK / CLEAR [10/2014 - 05/2019]

Chassis > ABS/VSC/TRAC > Clear DTCs
Turn the power switch on (READY).
Perform a road test.

Check if the same DTC is output.

Refer to DTC CHECK / CLEAR [10/2014 - 05/2019]

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Result	Proceed to
DTCs C1466/33 and/or C1467/34 are output.	A
DTCs C1466/33 and C1467/34 are not output.	B

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

Refer to PROBLEM SYMPTOMS TABLE [10/2014 - 05/2019]

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]

Result:

See step 10

REPLACE REAR SPEED SENSOR

Turn the power switch off.

Replace the rear speed sensor.

Refer to REMOVAL [10/2014 - 07/2020]

NOTE:

Check the speed sensor signal after replacement.

Refer to TEST MODE PROCEDURE [10/2014 - 09/2016]

Result

Proceed to
NEXT

Result:

See step 11

RECONFIRM DTC

Clear the DTCs.
Refer to DTC CHECK / CLEAR [10/2014 - 05/2019]

Chassis > ABS/VSC/TRAC > Clear DTCs
Turn the power switch on (READY).
Perform a road test.

Check if the same DTC is output.

Refer to DTC CHECK / CLEAR [10/2014 - 05/2019]

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Result	Proceed to
DTCs C1466/33 and/or C1467/34 are output.	A
DTCs C1466/33 and C1467/33 are not output.	B

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

Refer to PROBLEM SYMPTOMS TABLE [10/2014 - 05/2019]

Result:

END

Result:

See step 12

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

Turn the power switch off.

Replace the rear speed sensor rotor (rear axle hub and bearing assembly).

Refer to REMOVAL [10/2014 - 09/2016]

HINT:

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.

NOTE:

Check the speed sensor signal after replacement.

Refer to TEST MODE PROCEDURE [10/2014 - 09/2016]

Result

Proceed to
NEXT

Result:

See step 13

RECONFIRM DTC

Clear the DTCs.
Refer to DTC CHECK / CLEAR [10/2014 - 05/2019]

Chassis > ABS/VSC/TRAC > Clear DTCs
Turn the power switch on (READY).
Perform a road test.

Check if the same DTC is output.

Refer to DTC CHECK / CLEAR [10/2014 - 05/2019]

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Result	Proceed to
DTCs C1466/33 and/or C1467/33 are output.	A
DTCs C1466/33 and C1467/34 are not output.	B

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

Refer to PROBLEM SYMPTOMS TABLE [10/2014 - 05/2019]

Result:

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to REMOVAL [10/2014 - 09/2015] , or refer to REMOVAL [09/2015 - 05/2019]

Result:

END

CHECK REAR SPEED SENSOR INSTALLATION

Turn the power switch off.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	No clearance
*b	OK
*c	NG

Check the speed sensor installation.

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

Result

Proceed to
OK
NG

Result:

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY. Refer to REMOVAL [10/2014 - 09/2016]

Result:

See step 15

INSPECT REAR SKID CONTROL SENSOR WIRE

Make sure that there is no looseness at the locking part and the connecting part of the connectors.

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

Disconnect the o1 or p1 rear skid control sensor wire connector.
Disconnect the oP2 or pQ2 rear skid control sensor wire connector.

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

Standard Resistance

FOR RH

Tester Connection	Condition	Specified Condition
o1-2 (+) - oP2-1	Always	Below 1 Ω
o1-2 (+) or oP2-1 - Body ground and other terminals	Always	10 kΩ or higher
o1-1 (-) - oP2-2	Always	Below 1 Ω
o1-1 (-) or oP2-2 - Body ground and other terminals	Always	10 kΩ or higher

FOR LH

Tester Connection	Condition	Specified Condition
p1-2 (+) - pQ2-1	Always	Below 1 Ω
p1-2 (+) or pQ2-1 - Body ground and other terminals	Always	10 kΩ or higher
p1-1 (-) - pQ2-2	Always	Below 1 Ω
p1-1 (-) or pQ2-2 - Body ground and other terminals	Always	10 kΩ or higher

NOTE:

Check the speed sensor signal after replacement.

Refer to TEST MODE PROCEDURE [10/2014 - 09/2016]

Result

Proceed to
OK
NG

Result:

REPLACE REAR SKID CONTROL SENSOR WIRE. Refer to REMOVAL [10/2014 - 09/2016]

Result:

See step 16

CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - REAR SPEED SENSOR)

Make sure that there is no looseness at the locking part and the connecting part of the connector.
Reconnect the oP2 or pQ2 rear skid control sensor wire connector.
Disconnect the A57 skid control ECU (brake booster with master cylinder assembly) connector.

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

Standard Resistance

FOR RH

Tester Connection	Condition	Specified Condition
A57-22 (RR+) - o1-2 (+)	Always	Below 1 Ω
A57-22 (RR+) or o1-2 (+) - Body ground	Always	10 kΩ or higher
A57-9 (RR-) - o1-1 (-)	Always	Below 1 Ω
A57-9 (RR-) or o1-1 (-) - Body ground	Always	10 kΩ or higher

FOR LH

Tester Connection	Condition	Specified Condition
A57-20 (RL+) - p1-2 (+)	Always	Below 1 Ω
A57-20 (RL+) or p1-2 (+) - Body ground	Always	10 kΩ or higher
A57-7 (RL-) - p1-1 (-)	Always	Below 1 Ω
A57-7 (RL-) or p1-1 (-) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 17

INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SENSOR OUTPUT)

Reconnect the A57 skid control ECU (brake booster with master cylinder assembly) connector.

*A	for RH
*B	for LH
*a	Front view of wire harness connector (to Rear Speed Sensor)

Turn the power switch on (IG).

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

Standard Voltage

FOR RH

Tester Connection	Condition	Specified Condition
o1-2 (+) - Body ground	Power switch on (IG)	5.7 to 14 V

FOR LH

Tester Connection	Condition	Specified Condition
p1-2 (+) - Body ground	Power switch on (IG)	5.7 to 14 V

Result

Proceed to
OK
NG

Result:

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to REMOVAL [10/2014 - 09/2015] , or refer to REMOVAL [09/2015 - 05/2019]

Result:

See step 18

RECONFIRM DTC

Turn the power switch off.
Reconnect the o1 or p1 rear skid control sensor wire connector.
Clear the DTCs.
Refer to DTC CHECK / CLEAR [10/2014 - 05/2019]

Chassis > ABS/VSC/TRAC > Clear DTCs
Turn the power switch on (READY).
Perform a road test.

Check if the same DTC is output.

Refer to DTC CHECK / CLEAR [10/2014 - 05/2019]

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Result	Proceed to
DTCs C1466/33 and/or C1467/34 are output.	A
DTCs C1466/33 and C1467/34 are not output.	B

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

Refer to PROBLEM SYMPTOMS TABLE [10/2014 - 05/2019]

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]

Result:

See step 19

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

Turn the power switch off.

Replace the rear speed sensor rotor with rear speed sensor (rear axle hub and bearing assembly).

Refer to REMOVAL [10/2014 - 09/2016]

HINT:

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 with rear speed sensor.

NOTE:

Check the speed sensor signal after replacement.

Refer to TEST MODE PROCEDURE [10/2014 - 09/2016]

Result

Proceed to
NEXT

Result:

See step 20

RECONFIRM DTC

Clear the DTCs.
Refer to DTC CHECK / CLEAR [10/2014 - 05/2019]

Chassis > ABS/VSC/TRAC > Clear DTCs
Turn the power switch on (READY).
Perform a road test.

Check if the same DTC is output.

Refer to DTC CHECK / CLEAR [10/2014 - 05/2019]

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Result	Proceed to
DTCs C1466/33 and/or C1467/34 are output.	A
DTCs C1466/33 and C1467/34 are not output.	B

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step.

Refer to PROBLEM SYMPTOMS TABLE [10/2014 - 05/2019]

Result:

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to REMOVAL [10/2014 - 09/2015] , or refer to REMOVAL [09/2015 - 05/2019]

Result:

END