Programming and Relearning
SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: INITIALIZATION
1. DESCRIPTION
(a) If the suspension control ECU is replaced with a new one, enter test mode and perform registration of vehicle identification information.
(b) If replacing the suspension control ECU and/or height control sensor, perform the vehicle height offset calibration.
2. REGISTRATION OF VEHICLE IDENTIFICATION INFORMATION
NOTICE:
* The CAN communication system must be functioning normally.
* Make sure that the steering control ECU, ECM and AFS ECU are the correct type, normally functioning and correctly installed.
HINT
Vehicle identification information is obtained automatically through CAN communication when in test mode.
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / Air suspension / Utility / Signal Check.
(f) Confirm that the system is in test mode by checking that the "SPORT" indicator light in the combination meter blinks at 0.125 second intervals (0.125 seconds on and 0.125 seconds off).
HINT
* When the vehicle identification information is stored, the "SPORT" indicator light blinks at 0.125 second intervals (0.125 seconds on and 0.125 seconds off).
* When vehicle identification information is not stored, the "SPORT" indicator light blinks at 1 second intervals (1 second on and 1 second off).
3. VEHICLE HEIGHT OFFSET CALIBRATION
NOTICE:
* Make sure that the pressure of the tires is normal.
* Make sure that the vehicle is empty.
* Make sure that the parking brake is released and that the shift lever is on N.
1. PERFORM VEHICLE HEIGHT INSPECTION
(a) Adjust the pressure of the tires.
(b) Stabilize the suspension by releasing the parking brake and bouncing the corners of the vehicle up and down.
(c) Turn the engine switch off.
(d) Connect the Techstream to the DLC3.
(e) Start the engine and the Techstream on.
(f) Enter the following menus: Chassis / Air suspension / Data List.
(g) Press the height control switch and adjust the vehicle height to "HEIGHT HIGH".
(h) Press the height control switch and return the vehicle height to normal.
(i) Using the Data List, confirm that the vehicle height control operation is complete.
Air suspension
(j) Turn the engine switch off.
(k) Move the shift lever to N and move the vehicle forward and rearward.
(l) Turn the engine switch on (IG).
(m) Using the Techstream
Enter the following menus: Chassis / Air suspension / Data List. Then read and write the values for "After Height Adjust" and "Height Adjust" for each wheel.
Air suspension
(n) Turn the engine switch off.
(o) Perform the vehicle height inspection.
(1) for 2WD:
Standard vehicle height:
Measuring points:
A
Ground clearance of front wheel center
B
Ground clearance of front suspension lower No. 2 arm assembly front bush installation bolt head rear
C
Ground clearance of protrusion of rear suspension arm attachment (lower No. 2 installation cam bolt) Front Wheel Alignment
D
Ground clearance of rear wheel center
(2) for AWD:
- Bounce the vehicle at the corners up and down to stabilize the suspension and inspect the vehicle height.
Standard vehicle height:
Measuring points:
A
Ground clearance of front wheel center
B
Ground clearance of head center of bolt used to install the front No. 1 suspension lower arm to the front suspension member
C
Ground clearance of rear wheel center
D
Ground clearance of pit center of the attachment rear suspension arm
NOTICE:
Before inspecting the wheel alignment, adjust the vehicle height to the specified value.
- If the vehicle height is not as specified, adjust the height by pressing down on the vehicle several times to stabilize the suspension.
NEXT -- Continue to next step.
2. PERFORM VEHICLE HEIGHT OFFSET CALIBRATION
NOTICE:
The possible vehicle height automatic adjustment value is 20 mm (0.78 in.). If the "Height Adjust" value + (Standard value - Measurement value - "After Height Adjust" value) is 20 mm (0.78 in.) or more, first perform the vehicle height adjustment (height control link adjustment) Adjustments.
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / Air suspension / Utility / Height Offset.
(f) For each wheel, follow the instructions on the Techstream screen and input the input value to complete the vehicle height offset calibration.
HINT
Input value = Measurement value
(g) Start the engine.
(h) In the Data List, enter "Height Control".
(i) Press the height control switch and adjust the vehicle height to "HEIGHT HIGH".
(j) Press the height control switch and return the vehicle height to normal.
(k) Using the Data List, confirm that the vehicle height control operation is complete.
Air suspension
(l) Turn the engine switch off.
(m) Perform the vehicle height inspection. Check that the result is within +/-14.3 mm (+/-0.56 in.) of the standard value.
NEXT -- END