Toyota Yaris: Fuel Pump (for High Pressure) / On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. FUEL PUMP ASSEMBLY OPERATION

(a) Check fuel pressure.

(1) Connect the GTS to the DLC3.

(2) Turn the ignition switch to ON.

(3) Turn the GTS on.

(4) Start the engine.

(5) Enter the following menus: Powertrain / Engine / Active Test / Control the Target Fuel Pressure Offset.

(6) Select the Data List item: Fuel Pressure (High).

(7) Check that the fuel pressure fluctuates when the target fuel pressure changes.

HINT:

The target fuel pressure operation decreases the target fuel pressure by 12.5% or increases the target fuel pressure by 24.8%.

If the result is not as specified, replace the fuel pump assembly or fuel pressure sensor.

(b) Check operating sound.

(1) Start the engine.

(2) Using a sound scope, check the operating sound of the fuel pump assembly.

If no sound can be heard, check the fuel pump assembly, wire harness and ECM.

(3) Stop the engine.