Test Mode Procedure
SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: TEST MODE PROCEDURE
TEST MODE PROCEDURE
1. TEST MODE PROCEDURE (USING SST CHECK WIRE)
HINT:
- When entering the test mode, the suspension control ECU sets all the test DTCs first.
After completing the input signal operation for each inspection item, the DTCs that are judged normal by the suspension control ECU will be erased.
The DTCs for other inspection items may not be erased when only a certain signal is inspected.
- When the test mode returns back to the normal mode, all the test DTCs will be erased.
(a) Procedure for Test Mode.
(1) Make sure that the ignition switch is off.
(2) Set each of the check items in the table below to the condition in Operation (A).
(3) Using SST(s), connect the terminals TS and CG of DLC3.
SST: 09843-18040
(4) Turn the ignition switch to the ON position.
(5) Check that the height control OFF indicator light comes on and goes off at 0.125 second intervals. (4 Hz)
HINT: If the height control OFF indicator light does not blink, inspect the height control OFF indicator light circuit or the TS terminal circuit.
(6) Set checking each items to the condition in Operation (B).
HINT:
- When checking each item, the height control OFF indicator light should come on for 1 sec. then continue blinking.
- There is no input signal order.
Test mode table:
(7) Using the SST(s), connect the 3rd terminal of the SST to terminal TC in the DLC3.
SST: 09843-18040
(8) Read the number of blinks of the height control OFF indicator light.
- As an example, the blinking patterns of a normal code and code 82 are shown in the illustration.
- If 2 or more malfunctions are indicated at the same time, the lowest numbered code is displayed first.
- When a DTC or normal code is not output, check the TC terminal circuit TC and CG Terminal Circuit.
(9) Check the malfunction using the code table below.
(b) Clear the test DTCs and return to normal mode.
HINT: After repairing the malfunctions, clear the test DTC.
(1) Turn the ignition switch off.
(2) Disconnect the SST(s) from the terminals of DLC3.
SST: 09843-18040
(3) Turn the ignition switch to the ON position.
2. TEST MODE PROCEDURE (TECHSTREAM)
HINT:
- When entering the test mode, the suspension control ECU sets all the test DTCs first.
After completing the input signal operation for each inspection item, the DTCs that are determined normal by the suspension control ECU will be erased.
The DTCs for other inspection items may not be erased when only a certain signal is inspected.
- When the test mode returns back to the normal mode, all the test DTCs will be erased.
(a) Procedure for Test Mode.
(1) Make sure that the ignition switch is OFF.
(2) Set each of the check items to the condition in Operation (A) in the test mode table.
(3) Connect the Techstream to DLC3.
(4) Turn the ignition switch to the ON position.
(5) Select the SIGNAL CHECK mode on the Techstream.
(6) Set each of the check items to the condition in Operation (B) in the test mode table.
HINT: In step (6), all signals can be checked together.
(7) Read the DTCs by following the prompts on the tester screen.
HINT: Refer to the Techstream operator's manual for further details.
(8) After completing the input signal check, disconnect the tester and turn the ignition switch off.
DTC of Air Suspension System test mode function:
If a malfunction code is displayed during the test mode DTC check, check the circuit listed for that code. For details of each code, refer to the "See procedure" under respective "DTC No." in the chart.
3. ADJUST VEHICLE HEIGHT (WHEN USING TECHSTREAM)
HINT: Leave the driver's seat window open to make height control operation easier.
(a) Start the engine.
(b) Change the height control switch to the "N" position.
(c) Check that the blinking for the "N" light in the combination meter is on.
(d) Push the access mode switch to the off position.
(e) Stop the engine and turn the ignition switch OFF.
HINT: Refer to the illustration.
A: Ground clearance of lower front suspension arm No. 2 bush set bolt center.
B: Ground clearance of front wheel center.
C: Ground clearance of strut rod set bolt center.
D: Ground clearance of rear wheel center.
(g) If the value of the vehicle height is not within the range of the standard value, note the value measured and proceed to the following step.
Standard value table:
HINT: The difference between the right and the left sides should be less than 10 mm (0.39 in.).
NOTICE:
In the case where the difference between the value of the vehicle height and standard value exceeds 80 mm (3.15 in.), this check cannot be performed by using the Techstream.
In order to perform the check with the Techstream, adjust the difference below 80 mm (3.15 in.) without using the Techstream. Check the height control sensor sub-assembly C1711.
(h) Connect the Techstream to DLC3.
(i) Turn the ignition switch to the ON position.
(j) Perform the height offset procedure from the Air suspension menu.
(k) Start the engine.
(l) Change the height control switch to the "HI" position and check that the blinking for the "HI" light on the meter has been changed to the illuminating.
(m) Change the height control switch to the "N" position again and get out of the vehicle immediately while the "N" light is blinking.
NOTICE:
Be sure to get out of the vehicle while the light is blinking as the height will be changed and the value will not be measured properly if you fail to do so.
(n) Turn the ignition switch to the OFF position from outside of the vehicle after the "N" light comes on.
NOTICE:
Do not touch the vehicle as its height may be changed.
(o) Check the vehicle height again to confirm the value of the vehicle height is within the range of the standard values.
4. ADJUST VEHICLE HEIGHT (WHEN NOT USING TECHSTREAM)
(a) Start the engine.
(b) Change the height control switch to the "N" position.
(c) Check that the blinking for the "N" light on the meter has been changed to the illuminating.
(d) Stop the engine and turn the ignition switch OFF.
(e) Check the vehicle height (calculated value).
HINT: Leave the driver's seat window open to make height control operation easier.
A: Ground clearance of lower suspension arm No. 2 bush set bolt center.
B: Ground clearance of front wheel center.
C: Ground clearance of strut rod set bolt center.
D: Ground clearance of rear wheel center.
(f) If the value of the vehicle height is not within the range of the standard value, note the value measured and proceed to the following step.
Standard value table:
HINT: Difference between the right and the left sides should be less than 10 mm (0.39 in.).
(g) Adjust the front vehicle height control sensor links.
- Adjust the link of which the value for the vehicle height control is most beyond the range of the standard value first.
- If the values of the front vehicle height and the rear vehicle height are the same, adjust the front vehicle height control sensor link first.
(1) Loosen the nut and adjust the link position by moving it up and down along the bracket's hole on the vehicle.
HINT: The vehicle height will be changed by approx. 5 mm (0.19 in.) when changing the link by approx. 1 mm (0.04 in.)
(2) Tighten the nut on the vehicle height control sensor link.
Torque: 5.4 Nm (55 kgf-cm, 48in-lbf)
(h) Adjust the rear vehicle height control sensor links.
(1) Loosen the 2 lock-nuts on the vehicle height control sensor link and turn the link to adjust its length.
HINT:
- Lengthen the link to raise the vehicle height.
- Shorten the link to lower the vehicle height.
- 2WD:
The vehicle height will be changed be approx. 8 mm (0.31 in.) when turning the rear vehicle height control sensor link around once.
- 4WD:
The vehicle height will be changed by approx. 3 mm (0.12 in.) when turning the rear vehicle height control sensor link around once.
(2) Check if the vehicle height control sensor link dimension (A) shown in the illustration is shorter than the standard value.
Standard length:
18.0 mm (0.708 in.) or less
(3) Tighten the 2 lock-nuts on the vehicle height control sensor link.
Torque: 5.4 Nm (55 kgf-cm, 48in-lbf)
(i) Check the vehicle height again to confirm the value of the vehicle height is within the range of the standard value.
(j) Adjust the headlight aim only Adjustments.