Air Suspension System

AIR SUSPENSION SYSTEM
PRECAUTION

1. PRECAUTION





NOTICE: When disconnecting the negative (-) terminal cable of the battery, initialize the systems listed in the table after the completion of the operation.





2. AIR SUSPENSION SYSTEM PRECAUTION
a. Note for operation
1. When you work under or when jacking it up, make sure the height control OFF switch to prohibit controlling the height of the vehicle is on.

HINT:
^ When the height control OFF switch is operated to prohibit controlling the vehicles height, the height control OFF indicator light on the combination meter comes on.
^ The auto leveling control and access mode control continue to control for max. 60 seconds after turning the ignition switch OFF.
^ Disallowance of the height control OFF switch is recorded even when the negative terminal of the battery is disconnected.
^ Disallowance of the vehicle height control by the height control OFF switch is released at the vehicle speed of 30 km/h (19 mph) or more.

2. Do not operate the steering wheel, if there is no air in the pneumatic cylinder.

HINT: The pneumatic cylinder could be damaged if it is twisted without air in the cylinder.

3. In the case of letting down the vehicle without air in the cylinder, make sure all the pipes are securely connected.

HINT: The pneumatic cylinder could be damaged if there is any pipe disconnected while letting down the vehicle.

4. Do not apply battery voltage to the compressor motor for more than 60 seconds to prevent damage to the motor.

HINT: In the case where it is necessary to perform the operation by charging the battery for more than 60 seconds, for example height recovery without air in the cylinder, proceed the operation as follow: after 60 seconds have passed, turn the ignition switch OFF once, and then turn the ignition switch ON again for commencement of operation.





b. Note for connector operation.
1. In the case where disconnecting the connectors for height control sensor rear RH and height control valve sub-assembly No. 2, it possible causes incorrect connection. Since these 2 connectors have the same shape, they may be connected incorrectly unless the clamp of wire harness is properly connected. When you connecting the connectors, confirm a mark (white tape) on the wire harness of height control sensor rear RH and the clamp position of wire harness.
3. FAIL-SAFE FUNCTION

C1711/11-C1740/34:

a. When a Air Suspension System malfunction is detected under the normal control operation, the suspension control ECU will suspected the switch control of the height control operation.

HINT: (*1): The height control continues but the vehicle height lowering speed may be slower than usual.