Toyota Venza: Vehicle Speed Sensor "A" Intermittent / Erratic / High (P0503)

Toyota Venza Service Manual / Cruise Control / Cruise Control System / Vehicle Speed Sensor "A" Intermittent / Erratic / High (P0503)

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.

DTC	DTC Detection Condition	Trouble Area
P0503	A momentary interruption and noise are detected when a rapid change of the vehicle speed occurs while cruise control is in operation.	Vehicle speed sensors Vehicle speed sensor signal circuit Combination meter assembly ECM

WIRING DIAGRAM

CAUTION / NOTICE / HINT

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.

(d) Enter the following menus: Chassis / ABS/VSC/TRC / DTC.

(e) Check for DTCs.

Result	Proceed to
DTC is not output	A
DTC is output	B

GO TO VEHICLE STABILITY CONTROL SYSTEM (DTC CHART)

2.	REPLACE COMBINATION METER ASSEMBLY

(a) Replace the combination meter assembly (See page ).

3.	CHECK DTC (CRUISE CONTROL SYSTEM)

(a) Clear the DTCs (See page ).

(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 at the required speed of between 40 km/h (25 mph) and 200 km/h (125 mph).

(2) Turn the cruise control main switch on.

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

Result	Proceed to
DTC is not output	A
DTC P0503 is output (for 1AR-FE)	B
DTC P0503 is output (for 2GR-FE)	C

END

REPLACE ECM

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART If a trouble code is displayed during the DTC check, check the trouble areas listed for that code in the table below and proceed to the appropriate page. Cruise Contr ...

Vehicle Speed Sensor Malfunction (P0500)

DESCRIPTION The vehicle speed sensors detect the wheel speed and send the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a 4-pulse signa ...

Other materials about Toyota Venza:

System Diagram
SYSTEM DIAGRAM Communication Table Transmitting ECU Receiving ECU Signal Communication Method Skid control ECU AWD control ECU Wheel speed sensor signal Stop ...

Removal
REMOVAL PROCEDURE 1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. NOTICE: When disconnecting the cable, some systems ne ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" ...