Lexus ES manuals

Lexus ES: Cooling System

On-vehicle Inspection

ON-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 coolant and steam may be released and cause serious burns.

PROCEDURE

1. INSPECT FOR COOLANT LEAK

CAUTION:

Do not remove the radiator cap sub-assembly while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

(a) Remove the radiator cap sub-assembly.

(b) Fill the radiator assembly with engine coolant, and then install a radiator cap tester.

*a

Radiator Cap Tester

(c) Warm up the engine.

(d) Pump the radiator cap tester to 103 kPa (1.1 kgf/cm2, 15 psi), and then check that the pressure does not drop.

  • If the pressure drops, check the hoses, radiator assembly and engine water pump assembly (water inlet housing) for leaks.
  • If there are no signs of external engine coolant leaks, check the heater core, cylinder block sub-assembly and cylinder head sub-assembly.

(e) Remove the radiator cap tester.

(f) Install the radiator cap sub-assembly.

2. INSPECT ENGINE COOLANT LEVEL IN RESERVOIR TANK

(a) Check that the engine coolant level is between the L line and F line when the engine is cold.

If the engine coolant level is low, check for leaks and add engine coolant to the F line.

NOTICE:

Do not substitute plain water for engine coolant.

*a

F Line

*b

L Line

3. INSPECT ENGINE COOLANT QUALITY

CAUTION:

Do not remove the radiator cap sub-assembly while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

(a) Remove the radiator cap sub-assembly.

(b) Check if there are any excessive deposits of rust or scale around the radiator cap sub-assembly and water filler hole. Also, the engine coolant should be free of oil.

If excessively dirty, replace the engine coolant.

(c) Install the radiator cap sub-assembly.

READ NEXT:

 Flow Shutting Valve (for Atf)

 Components

COMPONENTS ILLUSTRATION *1 FRONT FENDER APRON SEAL LH *2 FRONT WHEEL OPENING EXTENSION PAD LH *3 FRONT WHEEL OPENING EXTENSION PAD RH *4 NO. 1 ENGINE UNDER COVER *5 NO. 2 ENG

 Inspection

INSPECTION PROCEDURE 1. INSPECT FLOW SHUTTING VALVE (NO. 1 WATER BY-PASS HOSE) (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Con

SEE MORE:

 Master Cylinder Pressure Circuit (C1786)

DESCRIPTION The absorber control ECU stores this DTC when a malfunction signal from the master cylinder pressure sensor built into the brake actuator assembly is received via CAN communication. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory C1786

 Inspection Mode Procedure

INSPECTION MODE PROCEDURE INSPECTION MODE (for HV Model) NOTICE: When operating the vehicle in an inspection mode for an operation such as a speedometer test, a DTC may be stored. Therefore, if the warning light illuminates, check for DTCs using the Techstream and clear the DTCs. HINT: If t

© 2016-2025 Copyright www.lexguide.net