Summary of Contents for Hadley SAMS
- Page 1 Smart Air Management System Self-Leveling System Owner & Service Manual 3/04/2005 Table of Contents...
- Page 2 Tag Dump Mode ..........................6 Self Leveling Mode ........................8 Visual Indicators ......................... 10 Error Codes ..........................10 SAMS Manifold & Valves ......................12 Theory of Operation ........................12 Valve Servicing ..........................14 Manifold Error Code Identification ..................16 Electrical Testing ......................... 17...
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Page 3: System Scope
(2); front (2). The wire harnessing will provide the necessary connections for providing DC electrical control power and ground to the SAMS system (from a suitable vehicle power source), provide the necessary height sensor connectors, provide the pneumatic manifold wiring interface, provide the necessary color coded wires for vehicle hardware integration, and provide the electrical connections for the user interface. -
Page 4: Raised Mode
Raised Mode This mode of operation is used to increase the clearance between the underside of the vehicle frame and the ground surface. The vehicle operator must select this mode of operation and choose to raise either the rear only of the vehicle or to raise the entire vehicle. A separate action must be performed by the vehicle operator in order to initiate either function of the raised mode of operation. -
Page 5: Tag Dump Mode
Partial lowering of the vehicle ride height can be chosen by the operator of the vehicle to decrease the clearance between the vehicle and the ground, to a predetermined position, in order to clear an overhead obstruction. This mode may be selected by momentarily depressing the “lower” pushbutton located on the user interface, with the vehicle speed at 10MPH or less. - Page 6 Note: The following illustration summarizes the raise, lower, and tag dump operation with relation to the respective user interface pushbuttons and indicators. RAISE Button TAG DUMP Button Press once to raise the rear of Press once to exhaust the air in the RV for increased bumper the rear tag axle to low clearance.
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Page 7: Self Leveling Mode
Self-Leveling Mode This mode of operation is two-fold. First, it can be used to evaluate perspective vehicle parking areas to ensure the vehicle can be adjusted to be within leveling parameters for maximizing occupant comfort (level find mode). Second, once a suitable parking area is found, it is used to automatically level the suspension of the vehicle, even though the parking area may be an uneven surface (self leveling mode). - Page 8 Once activated, the system will remain in the self leveling mode until either the “SET” pushbutton is depressed a second time or the vehicle parking brake is released. Note: The following illustration summarizes the “level find” and “self leveling” operation with relation to the respective user interface pushbuttons and indicators.
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Page 9: Visual Indicators
Note: The following section provides more information regarding the specific system error codes. Error Codes The ECU has the ability to monitor the SAMS system and detect electrical problems. Should the ECU detect a problem, a visual indication will be given by flashing the suspension indicator located on the user interface panel in such a manner as to represent a two or three-digit code. - Page 10 • 111 (one hundred eleven) – Front, Driver Exhaust Solenoid Valve • 112 (one hundred twelve) – Front, Driver Fill Solenoid Valve • 113 (one hundred thirteen) – Front, Curb Exhaust Solenoid Valve • 114 (one hundred fourteen) – Front, Curb Fill Solenoid Valve •...
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Page 11: Sams Manifold & Valves
Theory of Operation The manifold is an electro-pneumatic device used to control the air flow within the SAMS system. The valves are two-position and of a coil actuated design. This application requires two valves per air bag for ride height control, totaling twelve (12) valves in all. - Page 12 The valves are controlled by the SAMS electronic control unit (ECU). The ECU provides the brains for the Smart Air Management System. The ECU contains the system specific program to control the vehicle ride height, as defined by Blue Bird’s engineering specifications for system operation. The ECU receives signals from various system components, i.e.
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Page 13: Valve Servicing
When it becomes necessary to either raise or lower the vehicle ride height, the ECU will energize the respective manifold valve coil(s) by applying 12VDC. With 12VDC applied to the coil, current flows through the windings and creates an electro-magnetic field. This magnetic field is stronger than the existing spring pressure that holds the valve plunger against the valve seat within the manifold. - Page 14 See the below chart for an example of possible error codes. The error code number is identified in the far right column and descriptions are provided in the preceding columns. SAMS Error Code Info: Error Code Number Description 1...
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Page 15: Manifold Error Code Identification
Manifold Error Code Identification The below information identifies the manifold component with its associated error code listed in the previous chart. Error Error Error Code 131 Code 132 Code 123 Error Code 24 Error Code 121 Error Code 31 Error Code 113 Error Code 23... -
Page 16: Electrical Testing
A digital multimeter is a useful tool for troubleshooting and isolating electrical related problems. Open circuits are identified by no continuity shown on the display (1OL). Open circuits in the SAMS manifold electrical system are typically caused by pins that have pulled loose from the associated harness connector, wires that are broken at the pins in the harness connector, breaks in the coil windings, or broken wires in the wiring harness due to improper harness routing during the installation of the system.
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