Home ReviewsRefund
Home/Lexus/RX/Lexus RX II рестайлинг (2006-2009)/Repair manual/Cooling System (Mechanical)/Cooling: Diagnosis
Contents Section: Cooling System (Mechanical) All sections

Cooling: Diagnosis Lexus RX II рестайлинг

Cooling System (Mechanical) 11 illustrations ~954 words

ON-VEHICLE INSPECTION

Note. Check that no DTCs are present in the ABS and VSC motor relay. If any one of the DTCs (C0273/13, C0274/14, C1361/91) is detected, inspect the ABS and VSC motor relay in accordance with the troubleshooting of the brake ABS and VSC.

Scheme 2

Scheme 2: ON-VEHICLE INSPECTION
Scheme 2: ON-VEHICLE INSPECTION
  1. INSPECT COOLING FAN OPERATION WHEN ENGINE COOLANT TEMPERATURE IS BELOW 95°C (203°F) Check that the cooling fan does not operate when turning the ignition switch ON with the A/C switch OFF. Check that the cooling fan operates when turning the ignition switch ON with the coolant temperature sensor connector disconnected.
  2. INSPECT COOLING FAN OPERATION WHEN ENGINE COOLANT TEMPERATURE IS ABOVE 97°C (207°F) Warm up the engine and turn the A/C switch OFF. Check that the cooling fan operates when the engine coolant temperature is above 97°C (207°F). Check that the cooling fan stops when the engine coolant temperature is below 95°C (203°F). (Scheme 2): Inspecting Cooling Fan Operation

Scheme 3

Scheme 3: ON-VEHICLE INSPECTION
Scheme 3: ON-VEHICLE INSPECTION

Scheme 4

Scheme 4
Scheme 4
  1. DRAIN COOLANT (for Engine) Remove the radiator cap. CAUTION: To avoid the danger of being burned, do not remove the radiator cap while the engine and radiator are still hot. Thermal expansion will cause hot coolant and steam to blow out from the radiator. Drain the coolant by loosening the lower drain plug of the radiator and the cylinder block drain cock plugs. HINT: Coolant inside the radiator is drained from the drain hole located on the bottom of the engine under cover. Tighten the cylinder block drain cock plugs. Torque: 13 N*m (133 kgf*cm, 9 in.*lbf) (Scheme 3): Identifying Radiator Drain Cock Plug, Radiator Drain And Cylinder Block Drain Cock Plug
  2. ADD COOLANT (for Engine) Tighten the lower drain plug of the radiator. Loosen the upper drain plug of the radiator. (Scheme 4): Identifying Radiator Drain Cock Plug And Vent Plug Install a vinyl tube to the vent plug located on the upper drain plug. Fill the radiator with coolant until the vinyl tube is filled with the coolant. Tighten the upper drain plug. CAUTION: Do not use an alcohol type coolant or plain water alone. The coolant must be mixed with plain water (preferably de-mineralized water). Capacity: 10.3 liters (10.9 US qts, 9.0 lmp.qts) HINT: Improper coolants may damage engine cooling system. Use "Toyota Long Life Coolant" or equivalent. Mix it with plain water according to the manufacturer's instruction. Using of coolant which includes more than 50% (freezing protection down to -35°C (-31°F) or 60% (freezing protection down to -50°C (-58°F) of ethylene-glycol is recommended but not more than 70%. Observe the coolant level inside the radiator by pressing the inlet and outlet radiator hoses several times by hand. If the coolant level goes down, add the coolant. Install the radiator cap securely. Fill the radiator reservoir tank with coolant. Warm up the engine. HINT: Press the inlet and outlet radiator hoses several times by hand while warming up the engine. Stop the engine and wait until the coolant cools down. Remove the radiator cap and check the coolant level inside the radiator. If the coolant level is below the full level, perform the steps from ( a ) through ( j ) and repeat the operation until the coolant level stays the full level. Recheck the coolant level inside the radiator reservoir tank. If it is below the full level, add the coolant.
  3. INSPECT FOR COOLANT LEAK (for Engine) (See «COOLING SYSTEM»(ref-282997-S29273365312008041400000) )

Identifying Water Pump Components With Torque Specification (1 Of 6). Scheme 5

Scheme 5: Identifying Water Pump Components With Torque Specification (1 Of 6)
Scheme 5: Identifying Water Pump Components With Torque Specification (1 Of 6)

Identifying Water Pump Components With Torque Specification (2 Of 6). Scheme 6

Scheme 6: Identifying Water Pump Components With Torque Specification (2 Of 6)
Scheme 6: Identifying Water Pump Components With Torque Specification (2 Of 6)

Identifying Water Pump Components With Torque Specification (3 Of 6). Scheme 7

Scheme 7: Identifying Water Pump Components With Torque Specification (3 Of 6)
Scheme 7: Identifying Water Pump Components With Torque Specification (3 Of 6)

Identifying Water Pump Components With Torque Specification (4 Of 6). Scheme 8

Scheme 8: Identifying Water Pump Components With Torque Specification (4 Of 6)
Scheme 8: Identifying Water Pump Components With Torque Specification (4 Of 6)

Identifying Water Pump Components With Torque Specification (5 Of 6). Scheme 9

Scheme 9: Identifying Water Pump Components With Torque Specification (5 Of 6)
Scheme 9: Identifying Water Pump Components With Torque Specification (5 Of 6)

Identifying Water Pump Components With Torque Specification (6 Of 6). Scheme 10

Scheme 10: Identifying Water Pump Components With Torque Specification (6 Of 6)
Scheme 10: Identifying Water Pump Components With Torque Specification (6 Of 6)

Scheme 11

Scheme 11: REMOVAL
Scheme 11: REMOVAL

Scheme 12

Scheme 12
Scheme 12
  1. REMOVE ENGINE ROOM SIDE LH COVER NO.2 (See «REMOVAL»(ref-282992-S02024628612008041400000) )
  2. REMOVE ENGINE ROOM COVER SIDE (See «REMOVAL»(ref-282992-S02024628612008041400000) )
  3. DRAIN COOLANT (for Engine) (See «COOLANT (FOR ENGINE)»(ref-282997-S07256750572008041400000) )
  4. REMOVE FRONT WHEEL RH
  5. REMOVE ENGINE UNDER COVER NO.1
  6. SEPARATE FRONT FENDER SPLASH SHIELD SUB-ASSEMBLY RH (See «REMOVAL»(ref-282992-S03122957162008041400000) )
  7. REMOVE FRONT FENDER APRON SEAL RH (See «REMOVAL»(ref-282992-S03122957162008041400000) )
  8. REMOVE FRONT WIPER ARM & BLADE ASSEMBLY RH (See «REMOVAL»(ref-282998-S30117535582008041400000) )
  9. REMOVE FR WIPER ARM & BLADE ASSEMBLY LH (See «REMOVAL»(ref-282998-S30117535582008041400000) )
  10. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY (See «REMOVAL»(ref-282998-S30117535582008041400000) )
  11. REMOVE WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY (See «REMOVAL»(ref-282998-S30117535582008041400000) )
  12. REMOVE COWL TOP PANEL SUB-ASSEMBLY OUTER (See «REMOVAL»(ref-282992-S02024628612008041400000) )
  13. REMOVE BATTERY (See «REMOVAL»(ref-282992-S02024628612008041400000) )
  14. REMOVE BATTERY CARRIER SUB-ASSEMBLY (See «REMOVAL»(ref-282992-S02024628612008041400000) )
  15. REMOVE COOL AIR INTAKE DUCT SEAL (See «REMOVAL»(ref-282992-S02024628612008041400000) )
  16. REMOVE AIR CLEANER CAP W/INLET (See «REMOVAL»(ref-282992-S02024628612008041400000) )
  17. REMOVE AIR CLEANER W/RESONATOR (See «REMOVAL»(ref-282995-S32845695932008041400000) )
  18. SEPARATE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY (See «REMOVAL»(ref-282992-S02024628612008041400000) )
  19. REMOVE RESERVOIR BRACKET (See «REMOVAL»(ref-282992-S02024628612008041400000) )
  20. REMOVE AIR CLEANER BRACKET (See «REMOVAL»(ref-282992-S02024628612008041400000) )
  21. REMOVE ENGINE MOVING CONTROL ROD (See «REMOVAL»(ref-282992-S03122957162008041400000) )
  22. REMOVE ENGINE MOUNTING STAY NO.2 RH (See «REMOVAL»(ref-282992-S03122957162008041400000) )
  23. REMOVE CRANKSHAFT PULLEY (See «REMOVAL»(ref-282992-S03122957162008041400000) )
  24. REMOVE TIMING BELT NO.1 COVER (See «REMOVAL»(ref-282992-S03122957162008041400000) )
  25. REMOVE TIMING BELT NO.2 COVER (See «REMOVAL»(ref-282992-S03122957162008041400000) )
  26. REMOVE ENGINE MOUNTING BRACKET RH (See «REMOVAL»(ref-282992-S03122957162008041400000) )
  27. REMOVE TIMING BELT GUIDE NO.2
  28. REMOVE TIMING BELT (See «REMOVAL»(ref-282992-S03122957162008041400000) )
  29. REMOVE TIMING BELT IDLER SUB-ASSEMBLY NO.2 Remove the bolt and the timing belt idler sub-assembly No.2.
  30. REMOVE CAMSHAFT TIMING PULLEY (See «REMOVAL»(ref-282992-S31635811532008041400000) )
  31. REMOVE TIMING BELT NO.3 COVER (See «REMOVAL»(ref-282992-S31635811532008041400000) )
  32. REMOVE TIMING BELT IDLER SUB-ASSEMBLY NO.1 Using a socket hexagon wrench 10 mm, remove the pivot bolt, timing belt idler No.1 and plate washer. (Scheme 11): Locating Timing Belt Idler Bolt
  33. REMOVE WATER PUMP ASSEMBLY Remove the 3 bolts and 3 nuts, then remove the water pump and the gasket. (Scheme 12): Locating Water Pump Assembly Bolts And Nuts

More articles — Cooling