From 08/2009

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P0503: Vehicle Speed Sensor "A" Intermittent / Erratic / High
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 engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

(e) Check for DTCs.

Result:





B -- GO TO VEHICLE STABILITY CONTROL SYSTEM (DTC CHART) Vehicle Stability Control System
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 Dynamic Radar Cruise Control System.

(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 50 km/h (31 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 Dynamic Radar Cruise Control System.

Result:





B -- REPLACE ECM Components

A -- END