Toyota Camry owners & service manuals

Toyota Camry (XV70): Vehicle Speed Sensor "A" No Signal (P050031)

Toyota Camry Repair Manual XV70 (2018-2024) / Drivetrain / Ua80e (automatic Transmission / Transaxle) / Automatic Transaxle System / Vehicle Speed Sensor "A" No Signal (P050031)

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

Memory

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 signal is transmitted to the ECM for 2 seconds.
  • Open or short in vehicle speed signal circuit
  • Combination meter system
  • ECM

Comes on

DTC stored

SAE Code:

P0500
DTC Detection Condition Patterns:
 

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Pattern 4

Diagnostic Condition

Park/neutral position switch D input signal is ON.

○

○

○

○

The counter gear speed is 300 rpm or more.

○

○

○

○

When the vehicle is being driven in 1st gear, the transmission revolution sensor (NT) value is 1450 rpm or more.

○

-

-

-

When the vehicle is being driven in 2nd gear, the transmission revolution sensor (NT) value is 840 rpm or more.

-

○

-

-

When the vehicle is being driven in 3rd gear, the transmission revolution sensor (NT) value is 540 rpm or more.

-

-

○

-

When the vehicle is being driven in 4th gear, the transmission revolution sensor (NT) value is 400 rpm or more.

-

-

-

○

Malfunction Condition

No vehicle speed signal is transmitted to the ECM.

○

○

○

○

Duration

2 seconds or more

2 seconds or more

2 seconds or more

2 seconds or more

Detection Logic

1-trip detection logic

1-trip detection logic

1-trip detection logic

1-trip detection logic
DTC Detection Condition Patterns:
 

Vehicle Condition

Pattern 5

Pattern 6

Pattern 7

Pattern 8

Diagnostic Condition

Park/neutral position switch D input signal is ON.

○

○

○

○

The counter gear speed is 300 rpm or more.

○

○

○

○

When the vehicle is being driven in 5th gear, the transmission revolution sensor (NT) value is 330 rpm or more.

○

-

-

-

When the vehicle is being driven in 6th gear, the transmission revolution sensor (NT) value is 300 rpm or more.

-

○

-

-

When the vehicle is being driven in 7th gear, the transmission revolution sensor (NT) value is 300 rpm or more.

-

-

○

-

When the vehicle is being driven in 8th gear, the transmission revolution sensor (NT) value is 300 rpm or more.

-

-

-

○

Malfunction Condition

No vehicle speed signal is transmitted to the ECM.

○

○

○

○

Duration

2 seconds or more

2 seconds or more

2 seconds or more

2 seconds or more

Detection Logic

1-trip detection logic

1-trip detection logic

1-trip detection logic

1-trip detection logic

HINT:

This DTC is stored when any of the above detection patterns is met.

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, Combination meter, 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

Engine switch

On (IG)

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 (NSW)

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

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