SUSPENSION CONTROL: SUSPENSION CONTROL SYSTEM: ADJUSTMENT (2008 Sequoia)

Last Modified: 11-29-2007		1.6 N
Service Category: Suspension	Section: Suspension Control System
Model Year: 2008	Model: Sequoia	Doc ID: RM000001U53008X
Title: SUSPENSION CONTROL: SUSPENSION CONTROL SYSTEM: ADJUSTMENT (2008 Sequoia)

ADJUSTMENT

1. ADJUST STANDARD VEHICLE HEIGHT

(a) Release the parking brake and stabilize the suspensions by pushing up and down on the corners of the vehicle.

(b) Move the shift lever to N and settle the tires by moving the vehicle back and forth.

(d) On the height control switch, first press "HIGH" to raise the vehicle height, and then change the switch to "LOW" to lower it. Perform this operation one more time.

NOTICE:

Release the parking brake and move the shift lever to N.

2. INSPECT TIRE

3. MEASURE VEHICLE HEIGHT

4. OPERATE HEIGHT CONTROL SWITCH AND CHECK VEHICLE HEIGHT CHANGE

(a) Start the engine and change the height control switch from the NORMAL position to the HIGH and LOW positions.

Check the time until the height adjustment is completed and the amount of change in vehicle height.

Adjustment Time

From operation of height control switch to start of compressor.	Approx. 2 sec.
From start of compressor to completion of height adjustment. (NORMAL→HIGH)	Approx. 25 sec.
From start of compressor to completion of height adjustment. (NORMAL→LOW)	Approx. 35 sec.

Amount of Change in Vehicle Height

HIGH position	30 mm (1.18 in.)
LOW position	30 mm (1.18 in.)

(b) While adjusting vehicle height in the HIGH position, start the engine and change the height control switch from the HIGH position to the NORM position.

While adjusting vehicle height in the LOW position, start the engine and change the height control switch from the LOW position to the NORM position.

Check the time until the height adjustment is completed and the amount of change in vehicle height.

Adjustment Time

From operation of height control switch to open of exhaust valve.	Approx. 2 sec.
From open of exhaust valve to completion of height adjustment. (HIGH→NORMAL)	Approx. 35 sec.
From start of compressor to completion of height adjustment. (LOW→NORMAL)	Approx. 25 sec.

Amount of Change in Vehicle Height

HIGH position	30 mm (1.18 in.)
LOW position	30 mm (1.18 in.)

5. CHECK CONNECTIONS OF TUBES FOR AIR LEAKAGE

(a) Set the height control switch in the HIGH position and raise the vehicle height.

(b) Stop the engine.

6. ADJUST VEHICLE HEIGHT

NOTICE:

While adjusting vehicle height, do not put anyone or anything on or in the vehicle because doing so will affect vehicle height.

(a) Disable the vehicle height control by pressing the height control mode select switch.

(b) Put the vehicle on a level surface.

Standard vehicle height value:

(d) If the actual vehicle height (C - D measurement) differs from the standard vehicle height, adjust it by jacking up the frame, etc.

(e) Using the Techstream.

(1) Turn the ignition switch to ON or ACC.

(2) Using the Techstream measure the vehicle height values for the right side and the left side sensors.

Difference between the Techstream value and vehicle height (C - D measurement):

5 mm (0.20 in.) or less

Difference between the right side and the left side:

10 mm (0.39 in.) or less

(f) Not using the Techstream.

(1) Disconnect the connector of the height control sensor.

(2) Connect three 1.5 V dry cell batteries in series.

(3) Connect the battery positive (+) and negative (-) ends to the terminals as shown in the illustration.

Standard Voltage:

Position	Voltage (for 2WD)	Voltage (for 4WD)
High	2.72 V	2.79 V
Normal	2.29 V	2.36 V
Low	1.86 V	1.92 V

Difference between the right side and the left side:

0.14 V or less

(g) If the values measured in steps (e) and (f) are not as specified, adjust the vehicle height using the following procedure.

(1) Loosen the nut.

(2) Move the height control sensor link back and forth along the slotted hole of the bracket.

HINT:

Move the link toward the top of the vehicle to raise vehicle height. Move the link toward the bottom of the vehicle to lower vehicle height. Every 1 mm (0.039 in.) change in the installation position of the link causes vehicle height to change by approximately 1 mm (0.039 in.).

(3) Tighten the nut.

Torque: 5.4 N·m (55 kgf·cm, 48 in·lbf)

(h) Change the vehicle height (from the normal position to the high position, and from the high position to the normal position).

(i) Measure the vehicle height (C - D measurement) on the right side and left side.

(j) Check if the vehicle height (C - D measurement) is within the specified range.

HINT:

If the values are outside the standard, perform the procedures from (d) to (j) again.