Toyota Sienna Service Manual: Cooling system
On-vehicle inspection
1. INSPECT FOR COOLANT LEAK
| CAUTION: Do not remove the radiator cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns. |
NOTICE: Before performing each inspection, turn the A/C switch OFF.
(a) Fill the radiator with coolant and attach a radiator cap tester.
(b) Warm up the engine.
(c) Using a radiator cap tester, increase the pressure inside the radiator to 118 kPa (1.2 kgf/cm2, 17 psi), and check that the pressure does not drop.
If the pressure drops, check the hoses, radiator and water pump for leaks. If no external leaks are found, check the heater core, cylinder block and cylinder head.
2. INSPECT ENGINE COOLANT LEVEL IN RESERVOIR
(a) Check that the engine coolant level is between the LOW and FULL lines when the engine is cold.
If the engine coolant level is low, check for leaks and add "TOYOTA Super Long Life Coolant" or similar high quality ethylene glycol based non-silicate, nonamine, non-nitrite and non-borate coolant with longlife hybrid organic acid technology to the FULL line.
| NOTICE: Do not substitute plain water for engine coolant. |
3. INSPECT ENGINE COOLANT QUALITY
(a) Remove the radiator cap.
| CAUTION: Do not remove the radiator cap while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns. |
(b) Check if there are any excessive deposits of rust or scales around the radiator cap and radiator filler hole. Also, the coolant should be free of oil.
If excessively dirty, clean the coolant passage and replace the coolant.
(c) Install the radiator cap.
2Gr-fe cooling
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Other materials:
Maintenance data
(fuel, oil level, etc.)
Dimensions and weights
*1: Unladen vehicle
*2: The model code is indicated on the Certification Label. For details, see
“Vehicle identification” below.
*3: The towing package is required.
Toyota does not recommend towing with this vehicle without the towing
package.
Vehicle identifi ...
Setting the vehicle speed
Press the “ON-OFF” button to
activate the cruise control.
Cruise control indicator will come
on*1 or will be displayed on the
multi-information display*2.
Press the button again to deactivate
the cruise control.
Accelerate or decelerate the
vehicle to the desired s ...
Vehicle interior
Items
Check points
Accelerator pedal
The accelerator pedal should move
smoothly (without uneven pedal effort or
catching).
Automatic transaxle “Park”
mechanism
When parked on a slope with the shift
lever in P, is ...
