Dtc P0500 Vehicle Speed Sensor A

Engine. Lexus Is250, Is220D. Gse20 Ale20
2Ad-Fhv Engine Control System. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK SPEEDOMETER (OPERATION OF SPEEDOMETER)

READ VALUE OF INTELLIGENT TESTER (VEHICLE SPEED)

CHECK ECM TERMINAL VOLTAGE (SP1 TERMINAL)

DTC P0500 Vehicle Speed Sensor "A"


DESCRIPTION

The skid control ECU outputs a signal that is proportional to vehicle speed. This signal is based on the rotation of the ABS wheel speed sensors. After this, the signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter. It is then transmitted to the ECM. The ECM determines the vehicle speed based on the frequency of this signal.

Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Engine Control System.Ecd System. Dtc P0500 Vehicle Speed Sensor A


DTC No.
DTC Detection Condition
Trouble Area
P0500
Conditions (a), (b) and (c) continue for 7 seconds or more:
(2 trip detection logic)
(a) Engine coolant temperature is more than 70°C (158°F)
(b) Engine speed is between 2,000 rpm and 3,500 rpm
(c) No speed signal is input to ECM
  1. Open or short in speed sensor circuit
  2. Skid control ECU
  3. Combination meter
  4. ECM

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Engine Control System.Ecd System. Dtc P0500 Vehicle Speed Sensor A


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).
1.CHECK SPEEDOMETER (OPERATION OF SPEEDOMETER)

  1. Drive the vehicle.

  1. Check the speedometer reading in the combination meter.

    HINT:
    If the vehicle speed sensor signal is inaccurate, the speedometer will show abnormal readings.
    OK:
    Speedometer operates normally.


NG
CHECK SPEEDOMETER CIRCUIT (INCLUDE SPEED SENSOR)
OK


2.READ VALUE OF INTELLIGENT TESTER (VEHICLE SPEED)

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine and turn the intelligent tester ON.

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

  1. Check the vehicle speed at an engine speed of 2,000 rpm or more while the vehicle is running.

    OK:
    Same value as actual vehicle speed.


OK
CHECK FOR INTERMITTENT PROBLEMS
NG


3.CHECK ECM TERMINAL VOLTAGE (SP1 TERMINAL)


    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Engine Control System.Ecd System. Dtc P0500 Vehicle Speed Sensor A

  1. Disconnect the J34 combination meter connector.

  1. Disconnect the A49 ECM connector.

  1. Measure the resistance.

    Standard resistance (Check for open):
    Tester Connection
    		Specified Condition
    +S (J34-5) - SPD (A49-14)
    		Below 1 Ω
    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    +S (J34-5) or SPD (A49-14) - Body ground
    		10 kΩ or higher

  1. Reconnect the combination meter connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM