P0503

CRUISE CONTROL: CRUISE CONTROL SYSTEM: P0503: Vehicle Speed Sensor "A" Intermittent / Erratic / High

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 skid control ECU is detected while the cruise control is in operation, the ECM determines that there is a momentary interruption or noise, and outputs a DTC.





WIRING DIAGRAM





INSPECTION PROCEDURE

This DTC may be output by the vehicle stability control system at the same time. In that case, perform troubleshooting for the vehicle stability control system first.

PROCEDURE

1. CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / ABS/VSC/TRC / DTC.
(e) Check for DTCs.
Result:





B -- GO TO VEHICLE STABILITY CONTROL SYSTEM (DTC CHART)
A -- Continue to next step.

2. REPLACE COMBINATION METER ASSEMBLY
(a) Replace the combination meter assembly Components.
NEXT -- Continue to next step.

3. CHECK DTC (CRUISE CONTROL SYSTEM)
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Perform the following to make sure that the DTC detection conditions are met.
HINT: If the detection conditions are not met, the malfunction cannot be detected.

(1) Drive the vehicle at a speed of 40 km/h (25 mph) or more.
(2) Turn the cruise control main switch on.
(3) Push the -SET switch to activate the cruise control.
(c) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
Result:





C -- REPLACE ECM
B -- REPLACE ECM
A -- END