Toyota Sienna Service Manual: Precaution for cooling fan system

Toyota Sienna Service Manual / Introduction / Repair instruction / Precaution / Precaution for cooling fan system

NOTICE: • When the ignition switch is turned off and the engine temperature is high, the cooling fans may operate for approximately 3 minutes. • After turning the ignition switch off, keep hands and objects away from the fans when they are operating.

HINT:

If all of the following are met for a certain period of time during a few minute period immediately before the engine is stopped, the electric fans will continue to operate for 3 minutes after the engine is stopped. This is performed to ensure restartability and stabilize idle speed.

The intelligent tester indicates a very high coolant temperature.
The intelligent tester indicates a high outside air temperature.
The vehicle has been driven under high load (driving on an uphill or equivalent).

The following sensors are used for this control:

Coolant temperature sensor
Outside air temperature sensor
MAF sensor
Vehicle speed sensors

For vehicles equipped with catalytic converter

CAUTION: If a large amount of unburned gasoline or gasoline vapors flow into the converter, it may cause overheating and create a fire hazard. To prevent this, observe the following precautio ...

Vehicle lift and support locations

1. NOTICE ABOUT VEHICLE CONDITION WHEN JACKING UP VEHICLE (a) The vehicle must be unloaded before jacking up/ lifting up the vehicle. Never jack up/lift up a heavily loaded vehicle. (b) When re ...

Other materials:

Installation
1. INSTALL FUEL INJECTOR ASSEMBLY (a) Apply a light coat of spindle oil or gasoline to new Orings, and install them to each injector. (b) Apply a light coat of spindle oil or gasoline where the fuel delivery pipe contacts the O-ring. (c) Push the fuel injector while turning it to inst ...

How to proceed with troubleshooting
HINT: *: Use the intelligent tester. 1 VEHICLE BROUGHT TO WORKSHOP 2 CUSTOMER PROBLEM ANALYSIS (a) Confirm problem symptoms 3 CHECK MULTIPLEX COMMUNICATION SYSTEM* Check if the multiplex communication system DTC is output. HINT: The center airbag sensor assembly of this system ...

Disassembly
1. Remove oil filler cap sub-assembly (A) remove the oil filler cap sub-assembly and oil filler gasket. 2. REMOVE SPARK PLUG (a) Remove the spark plugs. 3. REMOVE OIL PAN DRAIN PLUG (a) Remove the oil pan drain plug and oil pan drain plug gasket. 4. REMOVE VENTILATION VALVE SUB-ASSEMBLY ...