Dtc P0500 Vehicle Speed Sensor A

Engine Hybrid System. Yaris. Ncp93, 131
1Nz-Fe Engine Control. Yaris. Ncp93, 131

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

CONFIRMATION DRIVING PATTERN

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM (VEHICLE SPEED)

CHECK COMBINATION METER SYSTEM (SPEED SIGNAL CIRCUIT)

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P0500 Vehicle Speed Sensor "A"


DESCRIPTION

  1. Automatic Transaxle, Manual Transaxle w/ABS Models
    Vehicles, which are equipped with ABS (Anti-lock Brake System), detect the vehicle speed using the skid control ECU (brake actuator assembly) and wheel speed sensor. The wheel speed sensor monitors the wheel rotation speed and sends a signal to the skid control ECU. The skid control ECU converts the wheel speed signal into a 4-pulse signal and transmits it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of the pulse signal.

    Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan). Dtc P0500 Vehicle Speed Sensor A

  1. Manual Transaxle w/o ABS Models
    The vehicle speed is detected using the speedometer sensor. The speedometer sensor transmits a 4-pulse signal for every revolution of the rotor shaft, which is rotated by the transaxle output shaft via the driven gear. The 4-pulse signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter. The signal is then transmitted to the ECM. The ECM determines the vehicle speed based on the frequency of the pulse signal.

Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan). Dtc P0500 Vehicle Speed Sensor A


DTC No.
DTC Detection Condition
Trouble Area
P0500
While vehicle being driven, no vehicle speed sensor signal transmitted to ECM
(1 trip detection logic: Automatic transaxle)
(2 trip detection logic: Manual transaxle)
  1. Open or short in speed signal circuit
  2. Combination meter
  3. ECM
  4. Wire harness or connector
HINT:
  1. Various systems use the vehicle speed signal distributed from the combination meter. Check all the components possibly related to speed signal.
  2. A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly.
    The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls the respective system based on the pulse signal.
  3. If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems using the speed signal will not operate normally.

MONITOR DESCRIPTION

  1. Automatic Transaxle
    The ECM assumes that the vehicle is being driven when the indicated engine speed is more than 2090 rpm and 30 seconds have elapsed since the park/neutral position switch was turned OFF (typical example values). If there is no speed signal from the combination meter, despite these conditions being met, the ECM interprets this as a malfunction in the speed signal circuit. The ECM then illuminates the MIL and stores the DTC.
  1. Manual Transaxle
    The ECM assumes that the vehicle is being driven when fuel cut with the accelerator pedal released continues for 4.6 seconds 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. The ECM then illuminates the MIL and stores the DTC.

MONITOR STRATEGY


Related DTCs
P0500: Vehicle speed sensor "A" pulse input error
Required Sensors/Components (Main)
Combination meter
Speedometer sensor
Skid control ECU
Required Sensors/Components (Related)
Park/neutral position switch, engine coolant temperature sensor, crankshaft position sensor, throttle position sensor and mass air flow meter
Frequency of Operation
Continuous
Duration
2 seconds: Automatic Transaxle, Intake air temperature -10°C (14°F) or more
8 seconds: Automatic Transaxle, Intake air temperature less than -10°C (14°F)
4.6 seconds: Manual Transaxle
MIL Operation
Immediate: Automatic Transaxle
2 driving cycles: Manual Transaxle
Sequence of Operation
None

TYPICAL ENABLING CONDITIONS


Manual Transaxle:
Monitor runs whenever following DTCs not present
None
Time after ignition switch turned from OFF to ON
3 seconds or more
Battery voltage
8 V or higher
Ignition switch
ON
Starter
OFF
Fuel-cut
ON

Automatic Transaxle:
Monitor runs whenever following DTCs not present
None
Ignition Switch
ON
Time after ignition switch OFF to ON
More than 3 seconds
Battery voltage
8 V or higher
Starter
OFF
Either of following conditions (a) or (b) met:
-
(a) Following conditions 1 and 2 met:
-
1. ECT and ECT sensor
20°C (68°F) or more, and sensor does not malfunction (P0115 or P00117, P0118, P0125)
2. Time after park/neutral position switch turned OFF
10 seconds or more
(b) Following conditions 1 and 2 met:
-
1. ECT and ECT sensor
Less than 20°C (68°F), or sensor malfunctions (P0115 or P0117, P0118, P0125)
2. Time after park/neutral position switch turned OFF
30 seconds or more
TP sensor fail (P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135)
Not detected
Engine speed
2090 rpm or more (varies with throttle valve opening angle)
Fuel cut at high engine speed
Not executing
Time after ignition switch turned to ON
0.5 seconds or more
TP sensor learning
Completed

TYPICAL MALFUNCTION THRESHOLDS


Vehicle speed sensor signal
No pulse input

CONFIRMATION DRIVING PATTERN


Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan). Dtc P0500 Vehicle Speed Sensor A

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the Techstream on [A].
  6. Start the engine and warm it up until the ECT reaches 75°C (167°F) or higher [B].
  7. Accelerate the vehicle to 74 km/h (46 mph) or higher [C].
  8. Maintain the vehicle speed at 74 km/h (46 mph) or higher (with the engine speed of 2100 rpm or higher) for 12 seconds or more [D].
  9. Decelerate the vehicle by releasing the accelerator pedal for 5 seconds or more to perform fuel cut [E].
    CAUTION:
    When performing the confirmation driving pattern, obey all speed limits and traffic laws
  10. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [F].
  11. Read pending DTCs.
    HINT:
    1. If a pending DTC is output, the system is malfunctioning.
    2. If a pending DTC is not output, perform the following procedure.
  12. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  13. Input the DTC: P0500.
  14. Check the DTC judgment result.

    Techstream Display
    		Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    N/A
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
    HINT:
    1. If the judgment result shows NORMAL, the system is normal.
    2. If the judgment result shows ABNORMAL, the system has a malfunction.
  15. If the result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (YARIS_NCP93 RM000000PDK0T5X.html).
    HINT:
    1. If a permanent DTC is output, the system is malfunctioning.
    2. If no permanent DTC is output, the system is normal.

WIRING DIAGRAM


Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan). Dtc P0500 Vehicle Speed Sensor A


INSPECTION PROCEDURE

HINT:
  1. Various systems use the vehicle speed signal distributed from the combination meter. Check all the components possibly related to speed signal.
  2. Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
1.READ VALUE USING TECHSTREAM (VEHICLE SPEED)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON and turn the Techstream on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Vehicle Speed.

  1. Drive the vehicle and confirm that the operation of the speedometer in the combination meter is normal.

    HINT:
    If the speedometer operation is abnormal, check it by following the procedure described in speedometer malfunction (YARIS_NCP93 RM000001YNX014X.html).

  1. Read the value displayed on the Techstream while driving the vehicle.

    Result
    Result
    		Proceed to
    Values displayed on Techstream and speedometer display not equal
    		A
    Values displayed on Techstream and speedometer display equal
    		B


B
CHECK FOR INTERMITTENT PROBLEMS (YARIS_NCP93 RM000000PDQ0Q2X.html)
A


2.CHECK COMBINATION METER SYSTEM (SPEED SIGNAL CIRCUIT)

  1. Check the circuits that send vehicle speed signals to this system in the meter system (YARIS_NCP93 RM000002UD7069X.html).


NEXT


3.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Clear the DTCs (YARIS_NCP93 RM000000PDK0T5X.html).

  1. Turn the ignition switch off and wait for at least 30 seconds.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Start the engine and warm it up.

  1. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

  1. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    HINT:
    If no DTCs (no pending DTCs) are output to the Techstream, the repair has been successfully completed.

NEXT

END