Toyota Venza manuals

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.

(c) Turn the Techstream 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


B

GO TO VEHICLE STABILITY CONTROL SYSTEM (DTC CHART)


A

2.

REPLACE COMBINATION METER ASSEMBLY

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



NEXT

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.

(c) Check for DTCs (See page ).


Result

Proceed to

DTC is not output

A

DTC P0503 is output (for 1AR-FE)

B

DTC P0503 is output (for 2GR-FE)

C


A

END


B

REPLACE ECM


C

REPLACE ECM

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