DTC    C1415    Rear Speed Sensor RH Output Malfunction

DTC    C1277    Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC)

DTC    C1278    Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC)

DTC    C1416    Rear Speed Sensor LH Output Malfunction

for Preparation Click here


DESCRIPTION

Refer to DTCs C1403 and C1404 (Click here).

DTC Code
DTC Detection Condition
Trouble Area
C1415
C1416
Any of the following is detected:
  1. An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more.
  2. 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.
  3. At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.
  1. Rear speed sensor RH/LH
  2. Speed sensor circuit
  3. Speed sensor rotor
  4. Brake actuator assembly (Skid control ECU)
C1277
C1278
Detected only during Test Mode.
  1. Rear speed sensor RH/LH
  2. Speed sensor rotor

HINT:
  1. DTC C1415 and C1277 are for the rear speed sensor RH.
  2. DTC C1416 and C1278 are for the rear speed sensor LH.


WIRING DIAGRAM

Refer to DTCs C1403 and C1404 (Click here).

INSPECTION PROCEDURE

NOTICE:
  1. When replacing the brake actuator assembly, perform zero point calibration (Click here).
  2. Disassembly of the rear speed sensor from the rear axle hub and bearing assembly is prohibited.

1.CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

  1. Using the intelligent tester, check for any momentary interruption in the wire harness and connector corresponding to the DTC (Click here).

    ABS/VSC/TRC 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    RR Speed Open
    		RR speed sensor open detection / ERROR or NORMAL
    		ERROR: Momentary interruption
    NORMAL: Normal
    		-
    RL Speed Open
    		RL speed sensor open detection / ERROR or NORMAL
    		ERROR: Momentary interruption
    NORMAL: Normal
    		-

    OK:
    There are no momentary interruptions.

    HINT:
    Perform the above inspection before removing the sensor and connector.



NG
Go to step 6
OK


2.READ VALUE USING INTELLIGENT TESTER (REAR SPEED SENSOR)

  1. Turn the ignition switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

    ABS/VSC/TRC (Skid Control ECU) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    RR Wheel Speed
    		RR wheel speed sensor reading / min.: 0 km/h (0 mph), max.: 326 km/h (202 mph)
    		Actual wheel speed
    		Similar speed as indicated on speedometer
    RL Wheel Speed
    		RL wheel speed sensor reading /min.: 0 km/h (0 mph), max.: 326 km/h (202 mph)
    		Actual wheel speed
    		Similar speed as indicated on speedometer

  1. Check that there is no difference between the speed value output from the speed sensor displayed on the intelligent tester and the speed value displayed on the speedometer when driving the vehicle.

    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 (Click here).

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



NG
Go to step 5
OK


3.PERFORM TEST MODE (SIGNAL CHECK)

  1. Turn the ignition switch off.

  1. Perform the sensor check in the Test Mode procedure (Click here).

    OK:
    All Test Mode DTCs are cleared.



NG
Go to step 5
OK


4.RECONFIRM DTC

  1. Turn the ignition switch off.

  1. Clear the DTCs (Click here).

  1. Start the engine.

  1. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

  1. Check if the same DTC is recorded (Click here).

    Result:

    Result
    		Proceed to
    DTCs (C1415 and C1416) are not output
    		A
    DTCs (C1415 and/or C1416) are output
    		B

    HINT:
    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).



B
Go to step 10
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (Click here)  

5.CHECK REAR SPEED SENSOR INSTALLATION


    C144931E02

  1. Turn the ignition switch off.

  1. Check the speed sensor installation.

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

    HINT:
    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.



NG
REPLACE REAR AXLE HUB AND BEARING ASSEMBLY (REAR SPEED SENSOR, SENSOR ROTOR) (Click here)
OK


6.CHECK HARNESS AND CONNECTOR (SKID CONTROL SENSOR WIRE)


    C196164E02

  1. Turn the ignition switch off.
    Text in illustration 
    *1
    		Front view of Speed Sensor Wire

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

  1. Disconnect the skid control sensor wire.

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

    Standard Resistance:
    for RH:
    Tester Connection
    		Condition
    		Specified Condition
    O1 ("A"-2) - O1 ("B"-1)
    		Always
    		Below 1 Ω
    O1 ("A"-2) - O1 ("B"-2)
    		Always
    		10 kΩ or higher
    O1 ("A"-2) - Body ground
    		Always
    		10 kΩ or higher
    O1 ("A"-1) - O1 ("B"-2)
    		Always
    		Below 1 Ω
    O1 ("A"-1) - O1 ("B"-1)
    		Always
    		10 kΩ or higher
    O1 ("A"-1) - Body ground
    		Always
    		10 kΩ or higher
    for LH:
    Tester Connection
    		Condition
    		Specified Condition
    P1 ("A"-2) - P1 ("B"-1)
    		Always
    		Below 1 Ω
    P1 ("A"-2) - P1 ("B"-2)
    		Always
    		10 kΩ or higher
    P1 ("A"-2) - Body ground
    		Always
    		10 kΩ or higher
    P1 ("A"-1) - P1 ("B"-2)
    		Always
    		Below 1 Ω
    P1 ("A"-1) - P1 ("B"-1)
    		Always
    		10 kΩ or higher
    P1 ("A"-1) - Body ground
    		Always
    		10 kΩ or higher

    NOTICE:
    Check the speed sensor signal after replacement (Click here).



NG
REPLACE SKID CONTROL SENSOR WIRE
OK


7.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR SPEED SENSOR)


    C197056E02

  1. Turn the ignition switch off.
    Text in illustration 
    *1
    		Front view of wire harness connector
    (to Skid Control ECU)
    *2
    		Front view of wire harness connector
    (to Rear Speed Sensor)

  1. Reconnect the skid control sensor wire.

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

  1. Disconnect the skid control ECU connector and the rear speed sensor connector.

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

    Standard Resistance (for LHD):
    for RH:
    Tester Connection
    		Condition
    		Specified Condition
    A16-17 (RR+) - O1-2 (RR+)
    		Always
    		Below 1 Ω
    A16-17 (RR+) - Body ground
    		Always
    		10 kΩ or higher
    A16-16 (RR-) - O1-1 (RR-)
    		Always
    		Below 1 Ω
    A16-16 (RR-) - Body ground
    		Always
    		10 kΩ or higher
    for LH:
    Tester Connection
    		Condition
    		Specified Condition
    A16-5 (RL+) - P1-2 (RL+)
    		Always
    		Below 1 Ω
    A16-5 (RL+) - Body ground
    		Always
    		10 kΩ or higher
    A16-4 (RL-) - P1-1 (RL-)
    		Always
    		Below 1 Ω
    A16-4 (RL-) - Body ground
    		Always
    		10 kΩ or higher


    Standard Resistance (for RHD):
    for RH:
    Tester Connection
    		Condition
    		Specified Condition
    A17-17 (RR+) - O1-2 (RR+)
    		Always
    		Below 1 Ω
    A17-17 (RR+) - Body ground
    		Always
    		10 kΩ or higher
    A17-16 (RR-) - O1-1 (RR-)
    		Always
    		Below 1 Ω
    A17-16 (RR-) - Body ground
    		Always
    		10 kΩ or higher
    for LH:
    Tester Connection
    		Condition
    		Specified Condition
    A17-5 (RL+) - P1-2 (RL+)
    		Always
    		Below 1 Ω
    A17-5 (RL+) - Body ground
    		Always
    		10 kΩ or higher
    A17-4 (RL-) - P1-1 (RL-)
    		Always
    		Below 1 Ω
    A17-4 (RL-) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.INSPECT SKID CONTROL ECU (SENSOR INPUT)


    C197057E02

  1. Reconnect the skid control ECU connector.
    Text in illustration 
    *1
    		Front view of wire harness connector
    (to Rear Speed Sensor)

  1. Turn the ignition switch to ON.

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

    Standard voltage:
    for RH:
    Tester Connection
    		Switch Condition
    		Specified Condition
    O1-2 (RR+) - Body ground
    		Ignition switch ON
    		8 to 14 V
    for LH:
    Tester Connection
    		Switch Condition
    		Specified Condition
    P1-2 (RL+) - Body ground
    		Ignition switch ON
    		8 to 14 V

    NOTICE:
    Check the speed sensor signal after replacement (Click here).

    HINT:
    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).



NG
REPLACE BRAKE ACTUATOR ASSEMBLY (Click here)
OK


9.RECONFIRM DTC

  1. Turn the ignition switch off.

  1. Clear the DTCs (Click here).

  1. Start the engine.

  1. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

  1. Check if the same DTC is recorded (Click here).

    Result:

    Result
    		Proceed to
    DTCs (C1415 and C1416) are not output
    		A
    DTCs (C1415 and/or C1416) are output
    		B

    HINT:
    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).



B
Go to step 10
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (Click here)  

10.REPLACE REAR AXLE HUB AND BEARING ASSEMBLY (REAR SPEED SENSOR, SENSOR ROTOR)

  1. Turn the ignition switch off.

  1. Replace the rear speed sensor and rear axle hub and bearing assembly (Click here).

    NOTICE:
    Check the speed sensor signal after replacement (Click here).

    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 it together with the rear axle hub and bearing assembly with rear speed sensor.


NEXT


11.RECONFIRM DTC

  1. Turn the ignition switch off.

  1. Clear the DTCs (Click here).

  1. Start the engine.

  1. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

  1. Check if the same DTC is recorded (Click here).

    Result:

    Result
    		Proceed to
    DTCs (C1415 and C1416) are not output
    		A
    DTCs (C1415 and/or C1416) are output
    		B

    HINT:
    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).



B
REPLACE BRAKE ACTUATOR ASSEMBLY (Click here)
A

END