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Comprehensive Guide to Electronic Air Suspension Systems Components

Explore the components of air suspension systems, including air springs, valves, compressors, sensors, and control modules. Learn how to diagnose and service late-model air spring systems, including diagnostic procedures and system services.

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Comprehensive Guide to Electronic Air Suspension Systems Components

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  1. ELECTRONIC AIR SUSPENSION SYSTEMS

  2. COMPONENTS • AIR SPRINGS AND VALVES • COMPRESSOR • SENSORS • CONTROL MODULE

  3. AIR SPRING • Replaces coil Spring • Can be inflated or deflated to trim car • Can be controlled individually or all together

  4. LATE MODEL AIR SPRING

  5. AIR SPRING VALVE • Normally closed • Intake or Exhaust • Mounted like a radiator cap. lock tabs • Controlled by Module

  6. AIR PUMP/COMPRESSOR • 12V Powered • Single Piston • Contains the Air Vent Valve • Air Drier • Controlled by Module through a relay • High Current

  7. Vent Valve

  8. SYSTEM MODULE • Usually in trunk • Controls: • Air Spring Valves • Air Vent Valve • Compressor Relay • Self Diagnostics • No KAM • Inputs • Sensors • Switches

  9. POWER ON/OFF SWITCH • Usually located in trunk • Must turn off if raise car

  10. HEIGHT SENSOR • One for each front wheel • One for both wheels on rear axle • Different construction

  11. LATE MODEL Soft/Firm Actuator

  12. 84-87 LINCOLN Linear Height sensor Air Bag Manual Diagnostics 88 & UP LINCOLN Rotary Height Sensor Strut/Air Bag Steering Sensor 168 Accel/Decel Logic Auto Diagnostics Soft/Firm C170 Brake Switch Speed Sensor INPUT/OUTPUT COMPARISON

  13. SYSTEM DIAGNOSIS • 1984-87 Continental - - Controlled leveling of vehicle only ( • 88 to present Continental - - Combines air leveling, automatic ride control, speed leveling

  14. 88 Continental Diagnostics • Visual Inspection • Vehicle Preparation • Drive Cycle Diagnostics • Service Bay Diagnostics • Spring Fill Diagnostics

  15. DRIVE CYCLE DIAGNOSTICS • Designed to catch intermittent faults. • Will store up to 32 fault codes in module for one hour after key off. • This test is done by driving car until the ride control warning lamp illuminates or the technician has determined that there is no fault. • If no fault, enter Service Bay Diagnostics

  16. SERVICE BAY DIAGNOSTICS • Broken down into 3 parts • Auto/Manual Diagnostic Checks - - Is a self check of system. Will say good or bad • Fault Code Display - - Displays codes • Functional Checks - - This test leads you to doing pinpoint tests

  17. SPRING FILL DIAGNOSTICS • Sometimes, Functional Tests will instruct you to perform Spring Fill Diagnostics. • Used to check individual springs

  18. SYSTEM SERVICES • Diagnostics Early Lincoln • Air Spring Removal/Installation Air Spring Inflation • Trim Height Adjustment • Line Service • Spring Fill Diagnostics

  19. 88 CONTINENTAL

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