How to Set Mode
SERVICING FULL-TIME 4WD VEHICLES
The full-time 4WD Celica is equipped with the viscous coupling type of center differential lock. When carrying out any kind of servicing or testing on a full-time 4WD in which the front or rear wheels are made to rotate (braking test, speedometer test, on the car wheel balancing, etc.), or when towing the vehicle, be sure to observe the precautions given below. If incorrect preparations or test procedures are used, the test will not be able to be successfully carried out, and may be dangerous as well. Therefore, before beginning any such servicing or test, be sure to check the following items:
(1) Center differential lock type
(2) Center differential mode position
(3) Whether wheels should be touching ground or jacked up
(4) Transmission gear position
(5) Maximum testing vehicle speed
(6) Maximum testing time
Also be sure to observe the following cautions:
(1) Never accelerate or decelerate the vehicle suddenly
(2) Observe the other cautions given for each individual test
BEFORE BEGINNING TEST
During tests with a brake tester or chassis dynamometer, such as braking force tests or speedometer tests, if only the front or the rear wheels are to be rotated, it is necessary to set the Mode Select Lever on the transaxle to the Viscous Free Mode or to the FF Mode depending on the type of test being perform. In addition, after moving the lever to the position of the desired mode, be sure to check that the center differential's state has changed accordingly.
MOVING MODE SELECT LEVER
1. JACK UP VEHICLE
2. REMOVE MODE SELECT LEVER SET BOLT
3. MOVE MODE SELECT LEVER TO DESIRED MODE POSITION
NOTES:
1. If the mode select lever cannot be moved smoothly, shift the transmission to 1st gear, then move the lever while rotating one front wheel by hand.
2. Do not use excessive force when moving the mode select lever.
4. LOCK MODE SELECT LEVER WITH SET BOLT
5. CONFIRM MODE
Viscous Free Mode:
Jack up one of the front wheels and check that the wheel can be rotated by hand with the transmission in neutral.
FF Mode:
Jack up one of the rear wheels and check that the wheel can be rotated by hand with the transmission in 1st gear.
Viscous (Normal) Mode:
Jack up one of the front wheels and check that the wheel resists being rotated by hand with the transmission in neutral.
6. AFTER FINISHING TEST, RETURN MODE SELECT LEVER TO "VISCOUS (NORMAL) MODE" POSITION AND INSTALL SET BOLT
CAUTION:
1. After moving the mode select lever, jack up one of the front or rear wheels and check that the wheel rotates to confirm that the mode selection has been made correctly.
2. Be sure to tighten the set bolt securely each time after moving the mode select lever.
3. Do not engage the clutch or pump the accelerator or brakes suddenly in the viscous free mode or the FF mode.
4. If either the front or the rear wheels are placed on the tester rollers in the viscous free mode, be careful not to exceed the following limits:
Maximum speed:
Speed indicated on speedometer 19 mph (30 km/h)
or
Wheel speed (tester speed) 38 mph (60 km/h)
Maximum test time: 60 sec.
Note that the actual wheel speed (tester speed) is twice the speed indicated by the speedometer due to center differential operation.
5. Do not drive the vehicle in 1st gear, 2nd gear or in reverse while in FF mode. If it is necessary to move the vehicle, drive it in 3rd, 4th or 5th gear. When desiring to back the vehicle, push it backwards manually.
6. After finishing the test, be sure to move the mode select lever back to the viscous (normal) mode and lock it securely with the set bolt.