Dynamic Radar Cruise Control System

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 operating, 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.

NOTICE:
When the ECM is replaced with a new one, initialization must be performed Installation.

PROCEDURE

1. READ OUTPUT 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) Read the DTCs Reading and Clearing Diagnostic Trouble Codes.

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 Removal.

NEXT -- Continue to next step.

3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0503)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs Dynamic Radar Cruise Control System.

(e) 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 (30 mph) or more.

(2) Turn the cruise control main switch on.

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

(f) Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

(g) Read the DTCs Dynamic Radar Cruise Control System.

Result:





B -- REPLACE ECM (for 2GR-FSE) Removal

C -- REPLACE ECM (for 4GR-FSE) Removal

A -- END