Lexus ES manuals

Lexus ES: On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT COOLING FAN SYSTEM

CAUTION:

To prevent injury due to contact with an operating cooling fan, keep your hands and clothing away from the cooling fan when inspecting the cooling fan system.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Active Test / Control the Engine Cooling Fan Duty Ratio.

Powertrain > Engine > Active Test

Tester Display

Control the Engine Cooling Fan Duty Ratio

(e) Check the operation of the cooling fan while operating it using the Techstream.

OK:

Active Test Operation

Fan Operation

30 - 100%

Cooling fan operates

0%

Cooling fan stops

If the cooling fan motor (fan with motor assembly) does not operate, check the cooling fan circuit.

Click here

READ NEXT:

 Cooling Fan Circuit

DESCRIPTION The ECM calculates an appropriate cooling fan speed based on the engine coolant temperature, air conditioning switch status, refrigerant pressure, engine speed and vehicle speed, and sends

 Cooling System

On-vehicle InspectionON-VEHICLE INSPECTION CAUTION / NOTICE / HINT CAUTION: Do not remove the radiator cap sub-assembly while the engine and radiator assembly are still hot. Pressurized, hot engine c

 Flow Shutting Valve

SEE MORE:

 Components

COMPONENTS ILLUSTRATION *1 CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) *2 ECU INTEGRATION BOX RH *3 GLOVE COMPARTMENT DOOR ASSEMBLY - -

 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" column of the table. Check each symptom by checking the suspect

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