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Toyota Sienna Service Manual: For vehicles equipped with mobile communication systems

Toyota Sienna Service Manual / Introduction / Repair instruction / Precaution / For vehicles equipped with mobile communication systems

FOR VEHICLES EQUIPPED WITH MOBILE COMMUNICATION SYSTEMS FOR VEHICLES EQUIPPED WITH MOBILE COMMUNICATION SYSTEMS

(a) Install the antenna far away from the ECU and sensors of the vehicle electronic systems as possible.

(b) Install an antenna feeder at least 20 cm (7.87 in.) away from the ECU and sensors of the vehicle electronic systems. For details about ECU and sensors locations, refer to the section on the applicable components.

(c) Keep the antenna and feeder separate from other wirings as much as possible. This will prevent signals sent from the communication equipment from affecting vehicle equipment and vice-versa.

(d) Check that the antenna and feeder are correctly adjusted.

(e) Do not install any high-powered mobile communication system.

Handling of hose clamps
HANDLING OF HOSE CLAMPS (a) Before removing the hose, check the clamp position so that it can be reinstalled in the same position. (b) Replace any deformed or dented clamps with new ones. ...

When servicing full-time 4wd vehicles
The full-time 4WD SIENNA is equipped with the open center differential system. If incorrect preparations or test procedures are used, the test will not only be unsuccessful, but may be dangerous ...

Other materials:

Active head restraints
When the occupant’s lower back presses against the seatback during a rear-end collision, the head restraint moves slightly forward and upward to help reduce the risk of whiplash on the seat occupant Active head restraints Even small forces applied to the seatback may cause the head rest ...

Taillight Relay Circuit
DESCRIPTION The Multiplex network body ECU controls TAIL relay when signal is received from headlight dimmer switch assembly. WIRING DIAGRAM INSPECTION PROCEDURE 1 PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to DLC3.  Turn the ignition switch ON and ...

Starter Relay Circuit High
MONITOR DESCRIPTION While the engine is being cranked, the positive battery voltage is applied to terminal STA of the ECM. If the ECM detects the Starter Control (STA) signal while the vehicle is being driven, it determines that there is a malfunction in the STA circuit. The ECM then il ...

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