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:

Occupant Classification System Malfunction (B1650/32)
DESCRIPTION The occupant classification system circuit consists of the center airbag sensor assembly and occupant classification system. If the center airbag sensor assembly receives signals from the occupant classification ECU, it determines whether the ...

Ignition Hold Monitor Malfunction (B2271)
DESCRIPTION This DTC is stored when a problem such as an open in the AM2 fuse, an open or short in the wire harness between the fuse and power management control ECU, a short in the IG output circuit inside the power management control ECU, a short betwee ...

Front Passenger Side Door Entry Lock Function does not Operate
DESCRIPTION If the front passenger door entry unlock function operates normally, but its entry lock function does not, this means that the request code from the front passenger door is being output normally. In this case, a malfunction in the lock sensor ...