Dynamic Radar Cruise Control System

CRUISE CONTROL: DYNAMIC RADAR 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 master cylinder solenoid (skid control ECU) is detected while the dynamic radar cruise control is in operation, the ECM determines there to be a momentary interruption and noise, and outputs a DTC.






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.

PROCEDURE

1. CHECK DTC (VEHICLE STABILITY CONTROL SYSTEM)
(a) Using the Techstream, enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Code.
(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC is not output.
NG -- GO TO VEHICLE STABILITY CONTROL SYSTEM
OK -- Continue to next step.
2. CHECK DTC (DYNAMIC RADAR CRUISE CONTROL SYSTEM)
(a) Using the Techstream, enter the following menus: Powertrain / Radar Cruise / Trouble Code.
(b) Clear the DTCs Dynamic Radar Cruise Control System.
(c) 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 40 km/h (25 mph) or more.
(2) Turn the cruise control main switch on.
(3) Push the -SET switch to activate the dynamic radar cruise control.
(d) Check for DTCs Dynamic Radar Cruise Control System.
OK:
DTC P0503 is not output.
NG -- REPLACE ECM
OK -- USE SIMULATION METHOD TO CHECK