VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1415,C1277,C1278 and C1416

DTC Code DTC Name
C1415 Rear Speed Sensor RH Output Malfunction
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)
C1416 Rear Speed Sensor LH Output Malfunction

DESCRIPTION

Refer to DTCs C1401 and C1402 (Click here).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1277

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

Stored only during test mode.

  • Rear speed sensor RH/LH

  • Speed sensor rotor

C1278

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

Stored only during test mode.

  • Rear speed sensor RH/LH

  • Speed sensor rotor

C1415

Rear Speed Sensor RH Output Malfunction

One of the following conditions is met:

  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.

  • Rear speed sensor RH/LH

  • Skid control sensor wire

  • Speed sensor circuit

  • Speed sensor rotor

  • Master cylinder solenoid (Skid control ECU)

C1416

Rear Speed Sensor LH Output Malfunction

One of the following conditions is met:

  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.

  • Rear speed sensor RH/LH

  • Skid control sensor wire

  • Speed sensor circuit

  • Speed sensor rotor

  • Master cylinder solenoid (Skid control ECU)
Tip:

  • DTCs C1415 and C1277 are for the rear speed sensor RH.

  • DTCs C1416 and C1278 are for the rear speed sensor LH.

WIRING DIAGRAM

Refer to DTCs C1407 and C1408 (Click here).

CAUTION / NOTICE / HINT

Note:

  • When replacing the master cylinder solenoid, perform calibration (Click here).

  • Check the speed sensor signal after cleaning or replacement (Click here).

PROCEDURE

  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

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      RR Speed Open

      Rear speed sensor RH open detection

      Error or Normal

      Normal

      -

      RL Speed Open

      Rear speed sensor LH open detection

      Error or Normal

      Normal

      -

      OK

      Normal (there are no momentary interruptions).

      Tip:

      Perform the above inspection before removing the sensor and connector.

      Result

      Result

      OK

      NG
    NG

    CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR SPEED SENSOR)Click here

    OK

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

    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Start the engine.

    4. Turn the intelligent tester on.

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

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      RR Wheel Speed

      Rear speed sensor RH reading

      Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

      Actual wheel speed

      No large fluctuations when driving at a constant speed.

      RL Wheel Speed

      Rear speed sensor LH reading

      Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

      Actual wheel speed

      No large fluctuations when driving at a constant speed.

    6. 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.

      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, refer to 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).

      Result

      Result

      OK

      NG
    NG

    CHECK REAR SPEED SENSOR INSTALLATIONClick here

    OK

  3. PERFORM TEST MODE (SIGNAL CHECK)

    1. Turn the engine switch on (IG).

    2. Perform the sensor check in the Test Mode Procedure.

      Click here

      OK

      All test mode DTCs are cleared.

      Result

      Result

      OK

      NG

      Chassis > ABS/VSC/TRC > Utility

      Tester Display

      Test Mode
    NG

    CHECK REAR SPEED SENSOR INSTALLATIONClick here

    OK

  4. RECONFIRM DTC

    1. Turn the engine switch on (IG).

    2. Clear the DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Clear DTCs

    3. Start the engine.

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

    5. Check if the same DTC is output.

      Click here

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC is output

      B

      Chassis > ABS/VSC/TRC > Trouble Codes

    A

    USE SIMULATION METHOD TO CHECK

    Click here

    B

    REPLACE REAR SPEED SENSORClick here

  5. CHECK REAR SPEED SENSOR INSTALLATION

    1. Turn the engine switch off.

    2. C144929C01

      *1

      Rear Speed Sensor

      *a

      No clearance

      *b

      OK

      *c

      NG

      Check the speed sensor installation.

      Click here

      OK

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

      The installation nut is tightened properly.

      Result

      Result

      OK

      NG
    NG

    INSTALL REAR SPEED SENSOR CORRECTLY

    OK

  6. INSPECT REAR SPEED SENSOR TIP

    1. Remove the rear speed sensor.

      Click here

    2. Check the speed sensor tip.

      OK

      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.

      Result

      Result

      OK

      NG
    NG

    CLEAN OR REPLACE REAR SPEED SENSOR

    OK

  7. INSPECT REAR SPEED SENSOR ROTOR

    1. Remove the rear axle hub and bearing assembly.

      Click here

    2. Check the speed sensor rotor.

      OK

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

      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

      Result

      OK

      NG
    NG

    CLEAN OR REPLACE REAR SPEED SENSOR ROTOR

    OK

  8. INSPECT SKID CONTROL SENSOR WIRE

    C214499C01

    *A

    for RH

    *B

    for LH

    *1

    Skid Control Sensor Wire

    -

    -

    1. Remove the skid control sensor wire.

      Click here

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

      Standard Resistance

      Table 1. for RH

      Tester Connection

      Condition

      Specified Condition

      Sq1-4 - q1-2 (RR+)

      Always

      Below 1 Ω

      Sq1-3 - q1-1 (RR-)

      Always

      Below 1 Ω

      Sq1-4 - Sq1-3

      Always

      10 kΩ or higher

      Sq1-4 - Sq1-1

      Always

      10 kΩ or higher

      Sq1-4 - Sq1-2

      Always

      10 kΩ or higher
      Table 2. for LH

      Tester Connection

      Condition

      Specified Condition

      Sq1-2 - q2-2 (RL+)

      Always

      Below 1 Ω

      Sq1-1 - q2-1 (RL-)

      Always

      Below 1 Ω

      Sq1-2 - Sq1-1

      Always

      10 kΩ or higher

      Sq1-2 - Sq1-3

      Always

      10 kΩ or higher

      Sq1-2 - Sq1-4

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    NG

    REPLACE SKID CONTROL SENSOR WIRE

    Click here

    OK

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

    1. Install the skid control sensor wire.

    2. Disconnect the A7 skid control ECU connector.

    3. Disconnect the q1 and/or q2 speed sensor connector.

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

      Standard Resistance

      Table 3. for RH

      Tester Connection

      Condition

      Specified Condition

      A7-5 (RR+) - q1-2 (RR+)

      Always

      Below 1 Ω

      A7-5 (RR+) - Body ground

      Always

      10 kΩ or higher

      A7-19 (RR-) - q1-1 (RR-)

      Always

      Below 1 Ω

      A7-19 (RR-) - Body ground

      Always

      10 kΩ or higher
      Table 4. for LH

      Tester Connection

      Condition

      Specified Condition

      A7-20 (RL+) - q2-2 (RL+)

      Always

      Below 1 Ω

      A7-20 (RL+) - Body ground

      Always

      10 kΩ or higher

      A7-6 (RL-) - q2-1 (RL-)

      Always

      Below 1 Ω

      A7-6 (RL-) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK TERMINAL VOLTAGE (RR+, RL+)

    1. Disconnect the q1 and/or q2 speed sensor connector.

    2. Connect the A7 skid control ECU connector.

    3. C207217C02

      *A

      for RH

      *B

      for LH

      *a

      Front view of wire harness connector

      (to Front 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

      q1-2 (RR+) - Body ground

      Engine switch on (IG)

      11 to 14 V
      Table 6. for LH

      Tester Connection

      Switch Condition

      Specified Condition

      q2-2 (RL+) - Body ground

      Engine switch on (IG)

      11 to 14 V

      Result

      Result

      OK

      NG
    NG

    REPLACE MASTER CYLINDER SOLENOID

    Click here

    OK

  11. RECONFIRM DTC

    1. Turn the engine switch on (IG).

    2. Clear the DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Clear DTCs

    3. Start the engine.

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

    5. Check if the same DTC is output.

      Click here

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC is output

      B

      Chassis > ABS/VSC/TRC > Trouble Codes

    A

    USE SIMULATION METHOD TO CHECK

    Click here

    B

  12. REPLACE REAR SPEED SENSOR

    1. Replace the rear speed sensor.

      Click here

      Result

      Result

      NEXT
    NEXT

  13. RECONFIRM DTC

    1. Turn the engine switch on (IG).

    2. Clear the DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Clear DTCs

    3. Start the engine.

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

    5. Check if the same DTC is output.

      Click here

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC is output

      B

      Chassis > ABS/VSC/TRC > Trouble Codes

    A

    END

    B

    REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

    Click here