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ELECTRONIC AIR ELECTRONIC AIR SUSPENSION SYSTEMSSUSPENSION SYSTEMS

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COMPONENTSCOMPONENTS

AIR SPRINGS AND VALVESAIR SPRINGS AND VALVES COMPRESSOR COMPRESSOR SENSORSSENSORS CONTROL MODULECONTROL MODULE

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AIR SPRINGAIR SPRING

Replaces coil Replaces coil SpringSpring

Can be inflated or Can be inflated or deflated to trim cardeflated to trim car

Can be controlled Can be controlled individually or all individually or all togethertogether

C155C155 and C178and C178

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LATE MODEL AIR SPRINGLATE MODEL AIR SPRING

C178C178

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AIR SPRING VALVEAIR SPRING VALVE

Normally closed Normally closed Intake or ExhaustIntake or Exhaust Mounted like a Mounted like a

radiator cap. lock radiator cap. lock tabstabs

Controlled by Controlled by ModuleModule

C156C156

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AIR PUMP/COMPRESSORAIR PUMP/COMPRESSOR

12V Powered12V Powered Single PistonSingle Piston Contains the Air Contains the Air

Vent ValveVent Valve Air DrierAir Drier Controlled by Controlled by

Module through a Module through a relayrelay

High CurrentHigh Current

C157C157

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Vent ValveVent Valve

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SYSTEM MODULESYSTEM MODULE

Usually in trunkUsually in trunk Controls:Controls:

• Air Spring ValvesAir Spring Valves• Air Vent ValveAir Vent Valve• Compressor RelayCompressor Relay• Self DiagnosticsSelf Diagnostics• No KAMNo KAM

InputsInputs• SensorsSensors• SwitchesSwitches

C159C159 and C163and C163

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POWER ON/OFF SWITCHPOWER ON/OFF SWITCH

Usually located in Usually located in trunktrunk

Must turn off if Must turn off if raise carraise car

C159C159

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HEIGHT SENSORHEIGHT SENSOR

One for each front One for each front wheelwheel

One for both One for both wheels on rear axlewheels on rear axle

Different Different constructionconstruction

C160 and C177C160 and C177

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Late Model Rotary Height Late Model Rotary Height SensorSensor

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LATE MODEL LATE MODEL SoftFirm ActuatorSoftFirm Actuator

C177C177

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INPUT/OUTPUT INPUT/OUTPUT COMPARISONCOMPARISON

84-87 LINCOLN84-87 LINCOLN Linear Height Linear Height

sensorsensor Air BagAir Bag Manual Manual

Diagnostics Diagnostics

88 & UP LINCOLN88 & UP LINCOLN Rotary Height SensorRotary Height Sensor Strut/Air Bag Strut/Air Bag Steering Sensor 168Steering Sensor 168 Accel/Decel LogicAccel/Decel Logic Auto DiagnosticsAuto Diagnostics Soft/Firm C170Soft/Firm C170 Brake SwitchBrake Switch Speed SensorSpeed Sensor

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SYSTEM DIAGNOSISSYSTEM DIAGNOSIS

1984-87 Continental - - Controlled 1984-87 Continental - - Controlled leveling of vehicle only (Page C154 leveling of vehicle only (Page C154 and L163)and L163)

88 to present Continental - - 88 to present Continental - - Combines air leveling, automatic Combines air leveling, automatic ride control, speed leveling (Page ride control, speed leveling (Page C175)C175)

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88 Continental Diagnostics 88 Continental Diagnostics

Visual InspectionVisual Inspection Vehicle PreparationVehicle Preparation Drive Cycle DiagnosticsDrive Cycle Diagnostics Service Bay DiagnosticsService Bay Diagnostics Spring Fill DiagnosticsSpring Fill Diagnostics

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DRIVE CYCLE DRIVE CYCLE DIAGNOSTICS DIAGNOSTICS Designed to catch intermittent faults.Designed to catch intermittent faults. Will store up to 32 fault codes in module Will store up to 32 fault codes in module

for one hour after key off.for one hour after key off. This test is done by driving car until the This test is done by driving car until the

ride control warning lamp illuminates or ride control warning lamp illuminates or the technician has determined that there the technician has determined that there is no fault.is no fault.

If no fault, enter Service Bay DiagnosticsIf no fault, enter Service Bay Diagnostics

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SERVICE BAY SERVICE BAY DIAGNOSTICSDIAGNOSTICS

Broken down into 3 partsBroken down into 3 parts• Auto/Manual Diagnostic Checks - - Is a Auto/Manual Diagnostic Checks - - Is a

self check of system. Will say good or self check of system. Will say good or badbad

• Fault Code Display - - Displays codesFault Code Display - - Displays codes• Functional Checks - - This test leads Functional Checks - - This test leads

you to doing pinpoint testsyou to doing pinpoint tests

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SPRING SPRING FILL DIAGNOSTICSFILL DIAGNOSTICS

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

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SYSTEM SERVICESSYSTEM SERVICES

Diagnostics (L163) Early LincolnDiagnostics (L163) Early Lincoln Air Spring Removal/Installation Air Spring Removal/Installation

(L164)(L164) Air Spring Inflation (Lab 166)Air Spring Inflation (Lab 166) Trim Height Adjustment (L167)Trim Height Adjustment (L167) Line Service (L167)Line Service (L167) Spring Fill Diagnostics (L178)Spring Fill Diagnostics (L178)

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88 CONTINENTAL88 CONTINENTAL

SHOP DEMOSHOP DEMO