Dtc P0503 Vehicle Speed Sensor A Intermittent / Erratic / High

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
Cruise Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

INSPECTION PROCEDURE

CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM OR ANTI-LOCK BRAKE SYSTEM)

CHECK DTC (CRUISE CONTROL SYSTEM)

DTC P0503 Vehicle Speed Sensor "A" Intermittent / Erratic / High


DESCRIPTION

If a malfunction (a rapid change in vehicle speed) in the vehicle speed signal being output from the master cylinder solenoid (skid control ECU) is detected while the cruise control is in operation, the ECM determines there to be a momentary interruption and noise, and outputs a DTC.

DTC Code
DTC Detection Condition
Trouble Area
P0503
A momentary interruption and noise are detected when a rapid change of the vehicle speed occurs while the cruise control is in operation.
  1. Vehicle speed sensor
  2. Vehicle speed sensor signal circuit
  3. ECM
  4. Combination meter

INSPECTION PROCEDURE

This DTC code may be output under the vehicle stability control system at the same time. In that case, perform troubleshooting for the vehicle stability control system first.
1.CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM OR ANTI-LOCK BRAKE SYSTEM)

  1. Using the intelligent tester, enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Code.

  1. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    OK
    (DTC is not output)
    		A
    NG
    (for Vehicle Stability Control System)
    		B
    NG
    (for Anti-lock Brake System)
    		C



B
GO TO VEHICLE STABILITY CONTROL SYSTEM (DTC CHART) (Click here)

C
GO TO ANTI-LOCK BRAKE SYSTEM (DTC CHART) (Click here)
A


2.CHECK DTC (CRUISE CONTROL SYSTEM)

  1. Using the intelligent tester, enter the following menus: Powertrain / Cruise Control / Trouble Code.

  1. Clear the DTC (Click here).

  1. Perform the following to make sure the DTC detection conditions are met.

    HINT:
    If the detection conditions are not met, the system cannot detect the malfunction.

    1. Drive the vehicle at a speed of 45 km/h (28 mph) or more.

    2. Turn the cruise control main switch on.

    3. Push the -SET switch to activate the cruise control.

  1. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    OK
    (DTC P0503 is not output)
    		A
    NG
    (for 1GR-FE)
    		B
    NG
    (for 1UR-FE)
    		C
    NG
    (for 3UR-FE)
    		D
    NG
    (for 1VD-FTV)
    		E



B
REPLACE ECM (Click here)

C
REPLACE ECM (Click here)

D
REPLACE ECM (Click here)

E
REPLACE ECM (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)