VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1273,C1274,C1332,C1333,C1466 and C1467

DTC Code DTC Name
C1273 Low Output Signal of Rear Speed Sensor RH (Test Mode DTC)
C1274 Low Output Signal of Rear Speed Sensor LH (Test Mode DTC)
C1332 Open in Rear Speed Sensor RH
C1333 Open in Rear Speed Sensor LH
C1466 Rear Speed Sensor RH
C1467 Rear Speed Sensor LH

DESCRIPTION

Each speed sensor detects the wheel speed and sends signals to the skid control ECU (brake actuator assembly). These signals are used by the ABS.

The speed sensor rotors have rows of alternating N and S magnetic poles. The Hall IC type speed sensors use the frequency of output pulses to detect the vehicle speed. Because the sensor outputs digital pulses, it can detect the vehicle speed even when the vehicle is nearly stationary.

DTCs C1273 and C1274 are cleared when the speed sensor sends a vehicle speed signal or when Test Mode ends. DTCs C1273 and C1274 are output only in Test Mode.

C151818E21

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1273

Low Output Signal of Rear Speed Sensor RH (Test Mode DTC)

Detected only during Test Mode.

  • Rear speed sensor RH

  • Sensor installation

  • Rear speed sensor rotor RH (rear axle hub and bearing assembly RH)

C1274

Low Output Signal of Rear Speed Sensor LH (Test Mode DTC)

Detected only during Test Mode.

  • Rear speed sensor LH

  • Sensor installation

  • Rear speed sensor rotor LH (rear axle hub and bearing assembly LH)

C1332

Open in Rear Speed Sensor RH

An open or short in the speed sensor signal circuit.

  • Rear speed sensor RH

  • Speed sensor circuit

  • Sensor installation

C1333

Open in Rear Speed Sensor LH

An open or short in the speed sensor signal circuit.

  • Rear speed sensor LH

  • Speed sensor circuit

  • Sensor installation

C1466

Rear Speed Sensor RH

Any of the following is detected:

  1. The vehicle speed is more than 50.4 km/h (31 mph) and pulses are not input for 0.4 seconds.

  2. After the initial start or restart and when the vehicle speed has reached 12 km/h (7 mph), a wheel speed of 0 km/h (0 mph) is detected.

  3. After the initial start or restart and when the vehicle speed has reached 20 km/h (12 mph), a rear wheel speed of 0 km/h (0 mph) is detected.

  4. The following conditions are met for 9 to 72 seconds or more (varies depending on the driving conditions):

    • The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5% or more of vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)

    • The vehicle speed is less than 100 km/h (62 mph) and the difference between the speed of the fastest wheel and the speed of the slowest wheel is 5 km/h (3 mph) or more. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 16 km/h (10 mph) is allowable.)

    • The vehicle speed is 100 km/h (62 mph) or more and the difference between the speed of the fastest wheel and the speed of the slowest wheel is 6% or more of vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)

  6. Wheel speed sensor signal fluctuation is equivalent to 98 G or more, or alternates between 50 G or more and -50 G or less.

  7. An abnormal signal is received from a wheel speed sensor.

  • Rear speed sensor RH

  • Speed sensor circuit

  • Rear speed sensor rotor RH (rear axle hub and bearing assembly RH)

  • Sensor installation

  • Skid control ECU (brake actuator assembly)

C1467

Rear Speed Sensor LH

Any of the following is detected:

  1. The vehicle speed is more than 50.4 km/h (31 mph) and pulses are not input for 0.4 seconds.

  2. After the initial start or restart and when the vehicle speed has reached 12 km/h (7 mph), a wheel speed of 0 km/h (0 mph) is detected.

  3. After the initial start or restart and when the vehicle speed has reached 20 km/h (12 mph), a rear wheel speed of 0 km/h (0 mph) is detected.

  4. The following conditions are met for 9 to 72 seconds or more (varies depending on the driving conditions):

    • The difference between the speed of the fastest wheel and the speed of the slowest wheel is 5% or more of vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)

    • The vehicle speed is less than 100 km/h (62 mph) and the difference between the speed of the fastest wheel and the speed of the slowest wheel is 5 km/h (3 mph) or more. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 16 km/h (10 mph) is allowable.)

    • The vehicle speed is 100 km/h (62 mph) or more and the difference between the speed of the fastest wheel and the speed of the slowest wheel is 6% or more of vehicle speed. (If the speed of any wheel is less than 5 km/h (3 mph), a speed difference of up to 15% is allowable.)

  6. Wheel speed sensor signal fluctuation is equivalent to 98 G or more, or alternates between 50 G or more and -50 G or less.

  7. An abnormal signal is received from a wheel speed sensor.

  • Rear speed sensor LH

  • Speed sensor circuit

  • Rear speed sensor rotor LH (rear axle hub and bearing assembly LH)

  • Sensor installation

  • Skid control ECU (brake actuator assembly)
Tip:

  • DTCs C1273, C1332 and C1466 are for the rear speed sensor RH.

  • DTCs C1274, C1333 and C1467 are for the rear speed sensor LH.

WIRING DIAGRAM

C334069E01

CAUTION / NOTICE / HINT

Note:

When replacing the skid control ECU (brake actuator assembly), perform system variant learning.

Click here

PROCEDURE

  1. READ VALUE USING GTS (REAR SPEED SENSOR)

    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Select the Data List using the GTS.

      Click hereClick hereClick 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 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 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

    4. Check the speed value output from the speed sensor displayed on the GTS.

      Tip:

      Factors that affect the indicated vehicle speed include tire size, tire pressure, 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 hereClick hereClick hereClick here

      OK

      The speed value output from the speed sensor displayed on the GTS is similar to the speed indicated on the speedometer.

      Result

      Proceed to

      OK

      NG
    NG

    CHECK REAR SPEED SENSOR INSTALLATIONClick here

    OK

  2. PERFORM TEST MODE INSPECTION (SIGNAL CHECK)

    1. Turn the ignition switch off.

    2. Perform the sensor check using the Test Mode procedure.

      Click hereClick hereClick here

      Chassis > ABS/VSC/TRC > Utility

      Tester Display

      Signal Check

      OK

      No Test Mode DTCs are output.

      Result

      Proceed to

      OK

      NG
    NG

    CHECK REAR SPEED SENSOR INSTALLATIONClick here

    OK

  3. RECONFIRM DTC

    1. Turn the ignition switch off.

    2. Clear the DTCs.

      Click hereClick here

      Chassis > ABS/VSC/TRC > Clear DTCs

    3. Turn the ignition switch off.

    4. Start the engine.

    5. Drive the vehicle at a speed of 54 km/h (34 mph) or more for at least 120 seconds.

    6. Check if the same DTC is output.

      Click hereClick here

      Chassis > ABS/VSC/TRC > Trouble Codes

    Result

    Result

    Proceed to

    DTCs C1332, C1333, C1466 and C1467 are not output.

    A

    DTCs C1332, C1333, C1466 and/or C1467 are output.

    B
    A

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick hereClick hereClick hereClick hereClick here

    B

    REPLACE REAR AXLE HUB & BEARING ASSEMBLY LHClick here

  4. CHECK REAR SPEED SENSOR INSTALLATION

    1. C210569C04

      *1

      Rear Speed Sensor

      *a

      Correct

      *b

      Incorrect

      *c

      No clearance

      Turn the ignition switch off.

    2. Check the speed sensor installation.

      OK

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

    Result

    Result

    Proceed to

    OK (for Sedan)

    A

    OK (for Hatchback, Wagon)

    B

    NG

    C
    B

    INSPECT SKID CONTROL SENSOR WIREClick here

    C

    INSTALL REAR SPEED SENSOR CORRECTLY

    Click hereClick hereClick here

    A

  5. INSPECT SKID CONTROL SENSOR WIRE

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

      C273725C05

      *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)

      -

      -

    2. Remove the skid control sensor wire.

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

      Standard Resistance

      Table 1. for RH

      Tester Connection

      Condition

      Specified Condition

      h1-2 (RR+) - hL1-1 (RR+)

      Always

      Below 1 Ω

      h1-2 (RR+) - hL1-2 (RR-)

      Always

      10 kΩ or higher

      h1-2 (RR+) or hL1-1 (RR+) - Body ground

      Always

      10 kΩ or higher

      h1-1 (RR-) - hL1-2 (RR-)

      Always

      Below 1 Ω

      h1-1 (RR-) - hL1-1 (RR+)

      Always

      10 kΩ or higher

      h1-1 (RR-) or hL1-2 (RR-) - Body ground

      Always

      10 kΩ or higher
      Table 2. for LH

      Tester Connection

      Condition

      Specified Condition

      j1-2 (RL+) - jL1-1 (RL+)

      Always

      Below 1 Ω

      j1-2 (RL+) - jL1-2 (RL-)

      Always

      10 kΩ or higher

      j1-2 (RL+) or jL1-1 (RL+) - Body ground

      Always

      10 kΩ or higher

      j1-1 (RL-) - jL1-2 (RL-)

      Always

      Below 1 Ω

      j1-1 (RL-) - jL1-1 (RL+)

      Always

      10 kΩ or higher

      j1-1 (RL-) or jL1-2 (RL-) - Body ground

      Always

      10 kΩ or higher
      Note:

      Check the speed sensor signal after replacement.

      Click hereClick hereClick here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE SKID CONTROL SENSOR WIRE

    Click hereClick here

    OK

  6. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - SKID CONTROL SENSOR WIRE)

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

    2. Disconnect the A97 skid control ECU (brake actuator assembly) connector.

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

      Standard Resistance

      Table 3. for RH

      Tester Connection

      Condition

      Specified Condition

      A97-17 (RR+) - hL1-1 (RR+)

      Always

      Below 1 Ω

      A97-17 (RR+) or hL1-1 (RR+) - Body ground

      Always

      10 kΩ or higher

      A97-29 (RR-) - hL1-2 (RR-)

      Always

      Below 1 Ω

      A97-29 (RR-) or hL1-2 (RR-) - Body ground

      Always

      10 kΩ or higher
      Table 4. for LH

      Tester Connection

      Condition

      Specified Condition

      A97-31 (RL+) - jL1-1 (RL+)

      Always

      Below 1 Ω

      A97-31 (RL+) or jL1-1 (RL+) - Body ground

      Always

      10 kΩ or higher

      A97-18 (RL-) - jL1-2 (RL-)

      Always

      Below 1 Ω

      A97-18 (RL-) or jL1-2 (RL-) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. RECONFIRM DTC

    1. Install the skid control sensor wire.

    2. Reconnect the A97 skid control ECU (brake actuator assembly) connector.

    3. Clear the DTCs.

      Click hereClick here

      Chassis > ABS/VSC/TRC > Clear DTCs

    4. Turn the ignition switch off.

    5. Start the engine.

    6. Drive the vehicle at a speed of 54 km/h (34 mph) or more for at least 120 seconds.

    7. Check if the same DTC is output.

      Click hereClick here

      Chassis > ABS/VSC/TRC > Trouble Codes

    Result

    Result

    Proceed to

    DTCs C1332, C1333, C1466 and/or C1467 are output.

    A

    DTCs C1332, C1333, C1466 and C1467 are not output.

    B

  8. REPLACE REAR AXLE HUB & BEARING ASSEMBLY LH

    1. Turn the ignition switch off.

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

      Click hereClick 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.

      Note:

      Check the speed sensor signal after replacement.

      Click hereClick hereClick here

    Result

    Proceed to

    NEXT
    NEXT

  9. RECONFIRM DTC

    1. Clear the DTCs.

      Click hereClick here

      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the ignition switch off.

    3. Start the engine.

    4. Drive the vehicle at a speed of 54 km/h (34 mph) or more for at least 120 seconds.

    5. Check if the same DTC is output.

      Click hereClick here

      Chassis > ABS/VSC/TRC > Trouble Codes

      Result

      Result

      Proceed to

      DTCs C1332, C1333, C1466 and C1467 are not output.

      A

      DTCs C1332, C1333, C1466 and/or C1467 are output.

      B
      Tip:

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

      Click hereClick hereClick hereClick hereClick here

    A

    END

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY

    Click hereClick hereClick hereClick hereClick hereClick here

  10. INSPECT SKID CONTROL SENSOR WIRE

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

      C273725C10

      *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)

      -

      -

    2. Remove the skid control sensor wire.

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

      Standard Resistance

      Table 5. for RH

      Tester Connection

      Condition

      Specified Condition

      h1-2 (RR+) - hL2-1 (RR+)

      Always

      Below 1 Ω

      h1-2 (RR+) - hL2-2 (RR-)

      Always

      10 kΩ or higher

      h1-2 (RR+) or hL2-1 (RR+) - Body ground

      Always

      10 kΩ or higher

      h1-1 (RR-) - hL2-2 (RR-)

      Always

      Below 1 Ω

      h1-1 (RR-) - hL2-1 (RR+)

      Always

      10 kΩ or higher

      h1-1 (RR-) or hL2-2 (RR-) - Body ground

      Always

      10 kΩ or higher
      Table 6. for LH

      Tester Connection

      Condition

      Specified Condition

      j1-2 (RL+) - jL2-1 (RL+)

      Always

      Below 1 Ω

      j1-2 (RL+) - jL2-2 (RL-)

      Always

      10 kΩ or higher

      j1-2 (RL+) or jL2-1 (RL+) - Body ground

      Always

      10 kΩ or higher

      j1-1 (RL-) - jL2-2 (RL-)

      Always

      Below 1 Ω

      j1-1 (RL-) - jL2-1 (RL+)

      Always

      10 kΩ or higher

      j1-1 (RL-) or jL2-2 (RL-) - Body ground

      Always

      10 kΩ or higher
      Note:

      Check the speed sensor signal after replacement.

      Click hereClick hereClick here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE SKID CONTROL SENSOR WIRE

    Click hereClick here

    OK

  11. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - SKID CONTROL SENSOR WIRE)

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

    2. Disconnect the A97 skid control ECU (brake actuator assembly) connector.

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

      Standard Resistance

      Table 7. for RH

      Tester Connection

      Condition

      Specified Condition

      A97-17 (RR+) - hL2-1 (RR+)

      Always

      Below 1 Ω

      A97-17 (RR+) or hL2-1 (RR+) - Body ground

      Always

      10 kΩ or higher

      A97-29 (RR-) - hL2-2 (RR-)

      Always

      Below 1 Ω

      A97-29 (RR-) or hL2-2 (RR-) - Body ground

      Always

      10 kΩ or higher
      Table 8. for LH

      Tester Connection

      Condition

      Specified Condition

      A97-31 (RL+) - jL2-1 (RL+)

      Always

      Below 1 Ω

      A97-31 (RL+) or jL2-1 (RL+) - Body ground

      Always

      10 kΩ or higher

      A97-18 (RL-) - jL2-2 (RL-)

      Always

      Below 1 Ω

      A97-18 (RL-) or jL2-2 (RL-) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    RECONFIRM DTCClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR