Lexus ES: Fuel Pump (for High Pressure)

Components

COMPONENTS

ILLUSTRATION

*1	NO. 1 FUEL PIPE SUB-ASSEMBLY	*2	FUEL PUMP ASSEMBLY
*3	FUEL TUBE SUB-ASSEMBLY	*4	FUEL PUMP LIFTER ASSEMBLY
*5	FUEL PUMP FLANGE	*6	FUEL PUMP SPACER GASKET
*7	O-RING	*8	FUEL PUMP PROTECTOR
	Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping": N*m (kgf*cm, ft.*lbf)		N*m (kgf*cm, ft.*lbf): Specified torque
*	For use with a union nut wrench	●	Non-reusable part

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. FUEL PUMP ASSEMBLY OPERATION

(a) Check fuel pressure.

(1) Connect the Techstream to the DLC3.

(2) Start the engine.

(3) Turn the Techstream on.

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

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

(6) 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) Remove the No. 1 engine cover sub-assembly.

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(2) Start the engine.

(3) 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.

(4) Stop the engine.

(5) Install the No. 1 engine cover sub-assembly.

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Inspection

INSPECTION

PROCEDURE

1. INSPECT FUEL PUMP ASSEMBLY

(a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 0.45 to 0.55 Ω If the result is not as specified, replace the fuel pump assembly.

*a Component without harness connected (Fuel Pump Assembly)

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