Toyota Sienna Service Manual: Cooling fan system

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 b ...

Precaution

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 of ...

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System check
HINT: Performing a SYSTEM CHECK enables the system, which consists of the multiple actuators, to be operated without removing any parts. In addition, it can show whether or not any DTCs are set, and can detect potential malfunctions in the system. The SYSTEM CHECK can be performed with an inte ...

Changing the engine switch positions
“LOCK” The steering wheel is locked and the key can be removed. (The key can be removed only when the shift lever is in “P”.) “ACC” Some electrical components such as the audio system can be used. “ON” All electrical components can be used. “START” ...

Basic inspection
When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following flowchart, the location of the problem can be found quickly a ...