Last Modified: 12-11-2024 6.11:8.1.0 Doc ID: RM100000002OT59
Model Year Start: 2025 Model: GR Corolla Prod Date Range: [09/2024 -           ]
Title: UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P050031; Vehicle Speed Sensor "A" No Signal; 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]

DTC

P050031

Vehicle Speed Sensor "A" No Signal

DESCRIPTION

The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a pulse signal and outputs it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of this pulse signal.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P050031

Vehicle Speed Sensor "A" No Signal

All of the following conditions are met (1-trip detection logic):

  • Park/neutral position switch D input signal is ON.
  • The counter gear speed is 300 rpm or more.
  • Any of the following conditions are met:
    1. Vehicle being driven in 1st gear:

      Transmission revolution sensor (NT) value is 1450 rpm or more.

    2. Vehicle being driven in 2nd gear:

      Transmission revolution sensor (NT) value is 840 rpm or more.

    3. Vehicle being driven in 3rd gear:

      Transmission revolution sensor (NT) value is 540 rpm or more.

    4. Vehicle being driven in 4th gear:

      Transmission revolution sensor (NT) value is 400 rpm or more.

    5. Vehicle being driven in 5th gear:

      Transmission revolution sensor (NT) value is 330 rpm or more.

    6. Vehicle being driven in 6th, 7th or 8th gear:

      Transmission revolution sensor (NT) value is 300 rpm or more.

  • No vehicle speed sensor signal transmitted to ECM for 2 seconds or more.
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)

Comes on

SAE Code:

P0500

MONITOR DESCRIPTION

The ECM assumes that the vehicle is being driven when the transmission counter gear speed is 300 rpm or more. If there is no speed signal from the combination meter despite this condition being met, the ECM interprets this as a malfunction in the speed signal circuit, then illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P0500: Vehicle speed sensor/Verify pulse input

Required sensors/components (Main)

Vehicle speed sensor, Skid control ECU

Required sensors/components (Sub)

Transmission revolution sensor (NT), ECT sensor

Frequency of operation

Continuous

Duration

2 sec.

MIL operation

Immediately

Sequence operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored

None

Battery voltage

8 V or more

Ignition switch

ON

Starter

OFF

Intermediate shaft speed sensor revolution

300 rpm or more

Engine

Running

Shift change is completed before starting next shift change operation

-

R position switch

OFF

D position switch

ON

Park/neutral position switch

OFF

Pressure control solenoid circuit fail (P08C1, P08C2, P0962, P0963, P0966, P0967, P0970, P0971, P2720, P2721, P2814, P2815, P281D, P281E)

(Pending + MIL)

Not detected

Torque Converter Clutch Pressure Control Solenoid circuit fail (P2763, P2764)

(Pending + MIL)

Not detected

Torque Converter Clutch Solenoid circuit fail (P2769, P2770)

(Pending + MIL)

Not detected

One of the following conditions is met: Condition (A), (B), (C), (D), (E), (F), (G) or (H)

  • Condition (A)

    ECM selected gear

    1st

    Turbine speed sensor revolution

    1450 rpm or more

    Condition (B)

    ECM selected gear

    2nd

    Turbine speed sensor revolution

    840 rpm or more

    Condition (C)

    ECM selected gear

    3rd

    Turbine speed sensor revolution

    540 rpm or more

    Condition (D)

    ECM selected gear

    4th

    Turbine speed sensor revolution

    400 rpm or more

    Condition (E)

    ECM selected gear

    5th

    Turbine speed sensor revolution

    330 rpm or more

    Condition (F)

    ECM selected gear

    6th

    Turbine speed sensor revolution

    300 rpm or more

    Condition (G)

    ECM selected gear

    7th

    Turbine speed sensor revolution

    300 rpm or more

    Condition (H)

    ECM selected gear

    8th

    Turbine speed sensor revolution

    300 rpm or more

Either of the following conditions is met: Condition (I) or (J)

  • Condition (I)

    ECT

    20°C (68°F) or more

    ECT sensor circuit fail (P0117, P0118)

    (Pending + MIL)

    Not detected

    Time after park/neutral position switch ON to OFF

    2 sec. or more

    Condition (J)

    Either of the following conditions is met

    (a) or (b)

    (a) ECT

    Less than 20°C (68°F)

    (b) ECT sensor circuit fail (P0117, P0118)

    (Pending + MIL)

    Detected

    Time after park/neutral position switch ON to OFF

    30 sec. or more

TYPICAL MALFUNCTION THRESHOLDS

Vehicle speed sensor signal

No signal

CONFIRMATION DRIVING PATTERN

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

HINT:

  • After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
  • When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.

    Click here 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: DTC CHECK / CLEAR

  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  2. Turn the ignition switch off and wait for 2 minutes or more.
  3. Turn the ignition switch to ON and turn the GTS on.
  4. Start the engine.
  5. Drive the vehicle at 13 km/h (8 mph) or more for a total of 2 seconds or more. [*1]

    HINT:

    [*1] : Normal judgment procedure.

    The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  6. Stop the vehicle.
  7. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
  8. Input the DTC: P050031.
  9. Check the DTC judgment result.

    GTS Display

    Description

    NORMAL
    • DTC judgment completed
    • System normal

    ABNORMAL
    • DTC judgment completed
    • System abnormal

    INCOMPLETE
    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    N/A
    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

NOTICE:

  • Perform the universal trip to clear permanent DTCs.

    Click here 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: DTC CHECK / CLEAR

  • Perform registration and/or initialization when parts related to the automatic transaxle are replaced.

    Click here 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; UC80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: PRECAUTION

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

Click here 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

HINT:

Check the CAN communication system, and proceed to the next step if no malfunction is recognized.

NEXT

REPLACE BRAKE ACTUATOR ASSEMBLY