ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:C1277,C1278,C1415 and C1416

DTC Code	DTC Name
C1277	Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC)
C1278	Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC)
C1415	Rear Speed Sensor RH Output Malfunction
C1416	Rear Speed Sensor LH Output Malfunction

DESCRIPTION

Refer to DTCs C1273, C1274, C1403 and C1404.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1277	Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC)	Detected only during Test Mode.	Rear speed sensor RH (for 4WD/AWD) Rear speed sensor RH (Rear axle hub and bearing assembly RH) (for 2WD) Rear speed sensor rotor RH (Rear axle hub and bearing assembly RH)
C1278	Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC)	Detected only during Test Mode.	Rear speed sensor LH (for 4WD/AWD) Rear speed sensor LH (Rear axle hub and bearing assembly LH) (for 2WD) Rear speed sensor rotor LH (Rear axle hub and bearing assembly LH)
C1415	Rear Speed Sensor RH Output Malfunction	Any of the following is detected: An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more. At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds. At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.	Rear speed sensor RH (for 4WD/AWD) Rear speed sensor RH (Rear axle hub and bearing assembly RH) (for 2WD) Rear speed sensor RH circuit Rear speed sensor rotor RH (Rear axle hub and bearing assembly RH) Skid control ECU (Brake actuator assembly)
C1416	Rear Speed Sensor LH Output Malfunction	Any of the following is detected: An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more. At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds. At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.	Rear speed sensor LH (for 4WD/AWD) Rear speed sensor LH (Rear axle hub and bearing assembly LH) (for 2WD) Rear speed sensor LH circuit Rear speed sensor rotor LH (Rear axle hub and bearing assembly LH) Skid control ECU (Brake actuator assembly)

Tip:

DTC C1415 and C1277 are for the rear speed sensor RH.
DTC C1416 and C1278 are for the rear speed sensor LH.

WIRING DIAGRAM

Refer to DTCs C1273, C1274, C1403 and C1404.

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CAUTION / NOTICE / HINT

Note:

When replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and CVT oil pressure calibration (for continuously variable transaxle).
K111:Click here
K111F:Click here
Disassembly of the rear speed sensor from the rear axle hub and bearing assembly is prohibited (for 2WD).

PROCEDURE

CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

Using the GTS, check for any momentary interruption in the wire harness and connector corresponding to the DTC.
Click here

Chassis > ABS/VSC/TRC > Data List


Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
RR Speed Open	Rear speed sensor open RH detection	Normal or Error	Normal	Error: Momentary interruption
RL Speed Open	Rear speed sensor LH open detection	Normal or Error	Normal	Error: Momentary interruption

Chassis > ABS/VSC/TRC > Data List


Tester Display
RR Speed Open
RL Speed Open

Tip:

Perform the above inspection before removing the sensor and connector.

There are no momentary interruptions.

Result


Proceed to
OK
NG (for 2WD)
NG (for 4WD/AWD)

NG (for 2WD)

INSPECT SKID CONTROL SENSOR WIREClick here

NG (for 4WD/AWD)

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - REAR SPEED SENSOR)Click here

READ VALUE USING GTS (REAR SPEED SENSOR)

Connect the GTS to the DLC3.
Start the engine.
Turn the GTS on.
Enter the following menus: Chassis / ABS/VSC/TRC / Data List.
According to the display on the GTS, read the Data List.
Check that there is no difference between the speed value output from the speed sensor displayed on the GTS and the speed value displayed on the speedometer when driving the vehicle.

Tip:
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.

Click here

OK

The speed value output from the speed sensor displayed on the GTS is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).

Note:
Check the speed sensor signal after replacement.

Click here
Tip:
- 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 it together with the rear axle hub and bearing assembly with rear speed sensor.
- If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step.
  Click here

Chassis > ABS/VSC/TRC > Data List


Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
RR Wheel Speed	Rear wheel speed sensor RH reading	Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations
RL Wheel Speed	Rear wheel speed sensor LH reading	Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations

Chassis > ABS/VSC/TRC > Data List


Tester Display
RR Wheel Speed
RL Wheel Speed

Result


Proceed to
OK
NG

CHECK REAR SPEED SENSOR INSTALLATIONClick here

PERFORM TEST MODE (SIGNAL CHECK)

Turn the ignition switch off.
Perform the sensor check in the Test Mode procedure.
Click here

Chassis > ABS/VSC/TRC > Utility


Tester Display
Signal Check

All Test Mode DTCs are cleared.

Result


Proceed to
OK
NG

CHECK REAR SPEED SENSOR INSTALLATIONClick here

RECONFIRM DTC

Clear the DTCs.
Click here
Start the engine.
Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
Check if the same DTC is recorded.
Click here

Chassis > ABS/VSC/TRC > Clear DTCs

Chassis > ABS/VSC/TRC > Trouble Codes

Tip:

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

Click here

Result


Proceed to
DTCs C1415 and C1416 are not output
DTCs C1415 and/or C1416 are output (for 2WD)
DTCs C1415 and/or C1416 are output (for 4WD/AWD)

DTCs C1415 and C1416 are not output

USE SIMULATION METHOD TO CHECK

Click here Click here Click here Click here

DTCs C1415 and/or C1416 are output (for 2WD)

REPLACE REAR AXLE HUB AND BEARING ASSEMBLYClick here

DTCs C1415 and/or C1416 are output (for 4WD/AWD)

REPLACE REAR SPEED SENSORClick here

CHECK REAR SPEED SENSOR INSTALLATION

Turn the ignition switch off.

*a	Normal
*b	Abnormal
*c	Clearance

for 2WD:

Check the speed sensor installation.

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

Tip:

Because the rear axle hub and bearing assembly cannot be disassembled, if the rear speed sensor needs replacement, replace the rear axle hub and bearing assembly.

*a	Normal
*b	Abnormal
*c	Clearance

for 4WD/AWD:

Check the rear speed sensor installation.

Click here

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

The installation bolt is tightened properly.

Result


Proceed to
OK (for 2WD)
OK (for 4WD/AWD)
NG (for 2WD)
NG (for 4WD/AWD)

OK (for 4WD/AWD)

INSPECT REAR SPEED SENSOR TIPClick here

NG (for 2WD)

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

Click here

NG (for 4WD/AWD)

INSTALL REAR SPEED SENSOR CORRECTLY

Click here

OK (for 2WD)

INSPECT SKID CONTROL SENSOR WIRE

Turn the ignition switch off.
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
for RH:
Disconnect the m1 and mM1 skid control sensor wire connectors.
for LH:
Disconnect the n1 and nN1 skid control sensor wire connectors.

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

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

Standard Resistance

for RH


Tester Connection	Condition	Specified Condition
m1-2 (+) - mM1-1	Always	Below 1 Ω
m1-1 (-) - mM1-2	Always	Below 1 Ω
m1-2 (+) - mM1-2	Always	10 kΩ or higher
m1-2 (+) or mM1-1 - Body ground	Always	10 kΩ or higher
m1-1 (-) - mM1-1	Always	10 kΩ or higher
m1-1(-) or mM1-2 - Body ground	Always	10 kΩ or higher

for LH


Tester Connection	Condition	Specified Condition
n1-2 (+) - nN1-1	Always	Below 1 Ω
n1-1 (-) - nN1-2	Always	Below 1 Ω
n1-2 (+) - nN1-2	Always	10 kΩ or higher
n1-2 (+) or nN1-1 - Body ground	Always	10 kΩ or higher
n1-1 (-) - nN1-1	Always	10 kΩ or higher
n1-1 (-) or nN1-2 - Body ground	Always	10 kΩ or higher

Note:

Check the speed sensor signal after replacement.

Click here

Result


Proceed to
OK
NG

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - REAR SPEED SENSOR)Click here

REPLACE SKID CONTROL SENSOR WIRE

Click here

INSPECT REAR SPEED SENSOR TIP

Remove the rear speed sensor.
Click here
Check the speed sensor tip.

No scratches, oil, or foreign matter on the sensor tip.

Note:

If no damage to the speed sensor tip is found during this inspection, do not replace the speed sensor.
If there is iron powder sticking to the rotor, this will result in a malfunction, so confirm that the rotor is not contaminated with foreign material before replacing the sensor.
Check the speed sensor signal after cleaning or replacement.
Click here

Result


Proceed to
OK
NG

CLEAN OR REPLACE REAR SPEED SENSOR

INSPECT REAR SPEED SENSOR ROTOR

Remove the rear axle hub and bearing assembly.
Click here
Check the speed sensor rotor.
Reinstall the rear speed sensor and rear axle hub and bearing assembly.
Click herefor the rear speed sensor
Click herefor the rear axle hub and bearing assembly

No scratches, oil, or foreign matter on the rotors.

Note:

Check the speed sensor signal after cleaning or replacement.

Click here

Tip:

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 it together with the rear axle hub and bearing assembly.

Result


Proceed to
OK
NG

CLEAN OR REPLACE REAR SPEED SENSOR ROTOR

CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - REAR SPEED SENSOR)

for 2WD:

Reconnect the mM1 and/or nN1 skid control sensor wire connector.
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
Disconnect the A63 skid control ECU (brake actuator assembly) connector.

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

Standard Resistance

Table 1. for RH
Tester Connection	Condition	Specified Condition
A63-17 (RR+) - m1-2 (+)	Always	Below 1 Ω
A63-16 (RR-) - m1-1 (-)	Always	Below 1 Ω
A63-17 (RR+) or m1-2(+) - Body ground	Always	10 kΩ or higher
A63-16 (RR-) or m1-1 (-) - Body ground	Always	10 kΩ or higher

Table 2. for LH
Tester Connection	Condition	Specified Condition
A63-5 (RL+) - n1-2 (+)	Always	Below 1 Ω
A63-4 (RL-) - n1-1 (-)	Always	Below 1 Ω
A63-5 (RL+) or n1-2 (+) - Body ground	Always	10 kΩ or higher
A63-4 (RL-) or n1-1 (-) - Body ground	Always	10 kΩ or higher

for 4WD/AWD:

Turn the ignition switch off.
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
Disconnect the A63 skid control ECU (brake actuator assembly) connector and the N11 and/or M20 rear speed sensor connector.

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

Standard Resistance

Table 3. for RH
Tester Connection	Condition	Specified Condition
A63-17 (RR+) - M20-1 (RR+)	Always	Below 1 Ω
A63-16 (RR-) - M20-2 (RR-)	Always	Below 1 Ω
A63-17 (RR+) or M20-1(RR+) - Body ground	Always	10 kΩ or higher
A63-16 (RR-) or M20-2 (RR-) - Body ground	Always	10 kΩ or higher

Table 4. for LH
Tester Connection	Condition	Specified Condition
A63-5 (RL+) - N11-1 (RL+)	Always	Below 1 Ω
A63-4 (RL-) - N11-2 (RL-)	Always	Below 1 Ω
A63-5 (RL+) or N11-1 (RL+) - Body ground	Always	10 kΩ or higher
A63-4 (RL-) or N11-2 (RL-) - Body ground	Always	10 kΩ or higher

Result


Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

INSPECT BRAKE ACTUATOR ASSEMBLY (SENSOR INPUT)

for 2WD:

Reconnect the A63 skid control ECU (brake actuator assembly) connector.
Turn the ignition switch to ON.

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

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

Standard Voltage

Table 5. for RH
Tester Connection	Switch Condition	Specified Condition
m1-2 (+) - Body ground	Ignition switch ON	8 to 14 V

Table 6. for LH
Tester Connection	Switch Condition	Specified Condition
n1-2 (+) - Body ground	Ignition switch ON	8 to 14 V

Note:

Check the speed sensor signal after replacement.

Click here

Tip:

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

for 4WD/AWD:

Reconnect the A63 skid control ECU (brake actuator assembly) connector.
Turn the ignition switch to ON.

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

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

Standard Voltage

Table 7. for RH
Tester Connection	Switch Condition	Specified Condition
M20-1 (RR+) - Body ground	Ignition switch ON	8 to 14 V

Table 8. for LH
Tester Connection	Switch Condition	Specified Condition
N11-1 (RL+) - Body ground	Ignition switch ON	8 to 14 V

Note:

Check the speed sensor signal after replacement.

Click here

Tip:

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

Click here

Result


Proceed to
OK
NG

REPLACE BRAKE ACTUATOR ASSEMBLY

Click here

RECONFIRM DTC

Turn the ignition switch off.
for 2WD:
Reconnect the m1 and/or n1 rear speed sensor connector.
for 4WD/AWD:
Reconnect the N11 and/or M20 rear speed sensor connector.
Clear the DTCs.
Click here
Start the engine.
Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
Check if the same DTC is recorded.
Click here

Chassis > ABS/VSC/TRC > Clear DTCs

Chassis > ABS/VSC/TRC > Trouble Codes

Tip:

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

Click here

Result


Proceed to
DTCs C1415 and C1416 are not output
DTCs C1415 and/or C1416 are output (for 2WD)
DTCs C1415 and/or C1416 are output (for 4WD/AWD)

DTCs C1415 and C1416 are not output

USE SIMULATION METHOD TO CHECK

Click here Click here Click here Click here

DTCs C1415 and/or C1416 are output (for 4WD/AWD)

REPLACE REAR SPEED SENSORClick here

DTCs C1415 and/or C1416 are output (for 2WD)

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

Turn the ignition switch off.
Replace the rear speed sensor and sensor rotor (rear axle hub and bearing assembly).
Click here

Note:
Check the speed sensor signal after replacement.

Click here
Tip:
- 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 it together with the rear axle hub and bearing assembly with rear speed sensor.

Result


Proceed to
NEXT

RECONFIRM DTC

Turn the ignition switch off.
Clear the DTCs.
Click here
Start the engine.
Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
Check if the same DTC is recorded.
Click here

Chassis > ABS/VSC/TRC > Clear DTCs

Chassis > ABS/VSC/TRC > Trouble Codes

Tip:

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

Click here

Result


Proceed to
DTCs C1415 and C1416 are not output
DTCs C1415 and/or C1416 are output

DTCs C1415 and C1416 are not output

END

DTCs C1415 and/or C1416 are output

REPLACE BRAKE ACTUATOR ASSEMBLY

Click here

REPLACE REAR SPEED SENSOR

Turn the ignition switch off.
Replace the rear speed sensor.
Click here

Note:
Check the speed sensor signal after replacement.

Click here

Result


Proceed to
NEXT

RECONFIRM DTC

Clear the DTCs.
Click here
Start the engine.
Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
Check if the same DTC is recorded.
Click here

Chassis > ABS/VSC/TRC > Clear DTCs

Chassis > ABS/VSC/TRC > Trouble Codes

Tip:

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

Click here

Result


Proceed to
DTCs C1415 and C1416 are not output
DTCs C1415 and/or C1416 are output

DTCs C1415 and C1416 are not output

END

DTCs C1415 and/or C1416 are output

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

Turn the ignition switch off.
Replace the rear speed sensor rotor (rear axle hub and bearing assembly).
Click here

Tip:

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 it together with the rear axle hub and bearing assembly.

Result


Proceed to
NEXT

RECONFIRM DTC

Clear the DTCs.
Click here
Start the engine.
Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
Check if the same DTC is recorded.
Click here

Chassis > ABS/VSC/TRC > Clear DTCs

Chassis > ABS/VSC/TRC > Trouble Codes

Tip:

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

Click here

Result


Proceed to
DTCs C1413 and C1414 are not output
DTCs C1413 and/or C1414 are output

DTCs C1413 and C1414 are not output

END

DTCs C1413 and/or C1414 are output

REPLACE BRAKE ACTUATOR ASSEMBLY

Click here