P0503

CRUISE CONTROL: CRUISE CONTROL SYSTEM (for Hatchback): P0503: Vehicle Speed Sensor Circuit Malfunction
P0503 - Vehicle Speed Sensor Circuit Malfunction

DESCRIPTION

If a malfunction (a rapid change in vehicle speed) in the vehicle speed signal being output from the skid control ECU*1,*2 or speedometer sensor*3 is detected while cruise control is in operation, the ECM determines there to be a momentary interruption or noise and stores a DTC.





- *1: w/ ABS

- *2: w/ VSC

- *3: w/o ABS

INSPECTION PROCEDURE

PROCEDURE

1. SYSTEM CHECK

(a) Check the vehicle specifications.

Result





B -- CHECK FOR DTC (VEHICLE STABILITY CONTROL
SYSTEM)

C -- CHECK FOR DTC
A -- Continue to next step.

2. CHECK FOR DTC (ANTI-LOCK BRAKE SYSTEM)

(a) Check for DTCs Anti-Lock Brake System (for Hatchback).

OK:

DTCs are not output.

Result





B -- CHECK FOR DTC

A -- GO TO ANTI-LOCK BRAKE SYSTEM Anti-Lock Brake System (for Hatchback)

3. CHECK FOR DTC (VEHICLE STABILITY CONTROL
SYSTEM)

(a) Check for DTCs.

HINT
* for Hatchback with Built-in Type Yaw Rate Sensor Vehicle Stability Control System (for Hatchback with Built-in Type Yaw Rate Sensor).
* for Hatchback with Separate Type Yaw Rate Sensor Vehicle Stability Control System (for Hatchback with Separate Type Yaw Rate Sensor).

OK:

DTCs are not output.

Result





B -- GO TO VEHICLE STABILITY CONTROL SYSTEM Vehicle Stability Control System (for Hatchback with Built-in Type Yaw Rate Sensor)

C -- GO TO VEHICLE STABILITY CONTROL SYSTEM Vehicle Stability Control System (for Hatchback with Separate Type Yaw Rate Sensor)
A -- Continue to next step.

4. CHECK FOR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) 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 approximately 40 km/h (25 mph) or more.

(2) Turn the cruise control main switch on.

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

(c) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC P0503 is not output.

NG -- GO TO SFI SYSTEM How To Proceed With Troubleshooting (from 07/2011)

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting