Part 2
INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION (Continued)
6. 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.
(c) When reusing a hose, attach the clamp on the clamp track portion of the hose.
(d) For a spring type clamp, you may want to spread the tabs slightly after installation by pushing in the direction of the arrows as shown in the illustration.
7. 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.
8. 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 as well.
* Therefore, before beginning any such servicing or test, be sure to check the following items:
* Whether wheels should be touching ground or jacked up
* Transaxle gear position
* Maximum testing vehicle speed
* Maximum testing time
CAUTION:
* Never accelerate or decelerate the vehicle suddenly
* Observe the other cautions given for each individual test
(a) Before Beginning Test
This vehicle does not have a center diff. lock mode or 4WD (Normal) Mode to allow only the front or rear wheel to be rotated.
The test method for this vehicle is different from that for vehicles equipped with the center diff. lock mode or 4WD (Normal) Mode, so make sure to use the correct test method.
(b) Braking Force Test
(c) (Vehicle Speed: Below 0.5 km/h or 0.3 mph)
When performing low-speed type brake tester measurements, observe the following instructions.
(1) Position the wheels to be tested (front or rear) on the tester.
(2) Shift the transaxle shift lever to "N" position.
(3) Idle the engine, operate the brake booster and perform the test.
(d) Speedometer Test or Other Tests
(Using Speedometer Tester or Chassis Dynamometer)
When performing test at high speed or high load, use the methods shown below.
(e) *: This is to avoid damaging the center differential.
NOTICE:
* Confirm that the vehicle is securely immobilized.
* Never operate the brakes to drive the wheels or stop them suddenly.
(f) On-Vehicle Wheel Balancing
(g) When doing on-vehicle wheel balancing on a full-time 4WD vehicle, to prevent the wheels from rotating at different speeds in different directions from each other (which could damage the center differential), always be sure to observe the following precautions:
(1) All 4 wheels should be jacked up, clearing the ground completely.
(2) The parking brake lever should be fully released.
(3) None of the brakes should be allowed to drag.
(4) The wheels should be driven on the wheel balancer with the engine running.
HINT
When doing this, be careful of the other wheels, which will rotate at the same time.
(5) Avoid sudden acceleration, deceleration and braking.
(6) Carry out wheel balancing with the transaxle in D position.
9. FOR VEHICLES EQUIPPED WITH TRACTION CONTROL (TRAC) SYSTEM
When using a 2-wheel drum tester such as a speedometer tester or chassis dynamometer, etc., or jacking up the front wheels and driving the wheels, always push in the TRAC cut ("TRAC OFF") switch and turn the TRAC system OFF.
(a) Confirm TRAC system is OFF
(1) Press the TRAC cut ("TRAC OFF") switch.
(2) Check that the TRAC OFF indicator light comes on when the TRAC system is turned OFF by the TRAC cut switch.
HINT
The SLIP indicator light should always operate right after the engine is restarted.
(3) Begin measurements.
(4) Press the TRAC cut switch to turn the TRAC to the operative mode and check that the TRAC OFF indicator light goes off.
HINT
The SLIP indicator light blinks when the TRAC system in operating.
10. FOR VEHICLES EQUIPPED WITH VEHICLE STABILITY CONTROL (VSC) SYSTEM
(a) Notices when using drum tester
(1) When using a drum tester, be sure to start the engine with the ignition switch OFF, and connect SST to the terminals TS and CG of the DLC3 before the measurement in order to cancel the VSC operation.
SST : 09843-18040
NOTICE:
* Confirm that the VSC warning light blinks.
* The VSC system is reset when the engine is restarted.
* Fasten the vehicle with lock chains.
(b) Notice of related operations to VSC
(1) Do not carry out unnecessary installation and removal as it might disorder the adjustment of the parts related to the VSC.
(2) Be sure to carry out the preparation for operation and the confirmation of operation completion in accordance with the instructions of the text and when the operations related to the VSC are performed