Question about Cars & Trucks

Open Question

I have a disco 3 suspension goes up & down ok but no air going into rear bags can't here any leaks .do I need new bags

Posted by on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
MrScary66613
  • 1990 Answers

SOURCE: air bags in rear of suspension

This is Very Common. You will need new Air Bags on the Rear.

Posted on Jan 18, 2009

Ad
defadad
  • 351 Answers

SOURCE: Disco 2 rear air suspension problem

listen for air leaking from the bag or the air supply line

Posted on May 27, 2009

  • 1 Answer

SOURCE: change rear air bag in suspension

hi i live in ontario california i want to change my rear air bags suspension ford 2001 expedition you cant help me please i need instruccions step by step thank you

Posted on Jun 25, 2009

  • 2 Answers

SOURCE: air suspension keeps going down on one side

Hi paul in case you dont already know this is most likely due to a leaky air spring or connection to the same

Posted on Aug 02, 2009

  • 4369 Answers

SOURCE: the rear suspension air bags no work

start here

The air suspension system is designed to improve ride, handling and general vehicle performance for static, on-road and off-road driving condition:

  • Ride is improved by using an air type spring (the soft ride is inherent).
  • Handling is improved by maintaining constant vehicle attitude.
The system consists of unique rear air springs, air compressor, air lines, air spring solenoids, height sensor, air suspension control module, attachments and associated signals derived from both driver and road inputs. With these components and signals, the air suspension control module commands changes in vehicle height that are necessary for the load leveling features.
The load leveling feature rear air suspension (RAS) systems shall automatically make adjustments in vehicle height so that the vehicle is always at trim height and constant front-to-rear vehicle attitudes are maintained over the expected load range of the vehicle. Adjustments in height that are necessary to correct height differences between the vehicle's left and right sides for RAS system shall be restricted to what can be reliably achieved with one air suspension height sensor.
The system uses one air suspension height sensor, a steering sensor, generic electronic module (GEM) transfer case inputs, and other vehicle sensors to measure driver and road inputs. The system changes vehicle height using an air compressor, two air lines, and the use of an air spring with an air spring solenoid.
The air suspension system holds vehicle height when the rear hatch or any door is opened. The system stores rear vehicle height the moment any open door is detected. The system then maintains this height regardless of the addition or removal of a load. The system will return to its commanded height when all doors are closed and the vehicle speed exceeds 16 km/h (10 mph).
Air Suspension Switch
The air suspension switch is located behind the RH kick panel on a mounting bracket. The switch interrupts power to the air suspension control module.
The air suspension switch supplies a signal to the air suspension control module. Without the air suspension control module receiving this signal the load leveling system is inoperative and will not react when rear of the vehicle is raised or lowered. If the air suspension system is disabled by turning off air suspension switch, a "CHECK SUSP" will appear in the RH corner of the instrument cluster with the ignition in the run position.
Air Compressor
The RAS air compressor:
  • Is not interchangeable with four wheel air suspension (4WAS) compressor.
  • Consists of the compressor and vent solenoid; neither are replaceable as individual items.
  • Is mounted in the engine compartment between the washer fluid bottle and headlamp (RH front corner).
  • Is a single cylinder electric motor driven unit that provides pressurized air as required.
  • Is powered by a solid state relay, controlled by the air suspension control module.
  • Passes pressurized air through the compressor air drier that contains silica gel (a drying agent). Moisture is then removed from the compressor air drier when vented air passes out of the system during vent operation.
  • Air drier has a single port and is not interchangeable with 4WAS compressor air drier.
  • Air drier may be replaced separately.
  • Incorporates a snorkle that may be replaced separately.
The vent solenoid:
  • Allows air to escape from the system during venting actions.
  • Is located in the air compressor cylinder head.
  • Has a 160 psi internal relief valve.
  • Shares a common electrical connector with the air compressor motor.
  • Is enclosed in the cylinder head casting, which forms an integral valve housing that allows the valve tip to enter the pressurized side of the system.
  • Has an O-ring seal that prevents air leakage past the valve tip.
  • Opens when the air suspension control module determines lowering is required.
  • Provides an escape route for pressurized air that opens when system pressures exceed safe operating levels.
  • Is replaced with the air compressor as a unit.
Air Spring
RAS vehicles use air springs in the rear. The air springs provide a varying spring rate proportional to the systems air pressure and volume. The air suspension system regulates the air pressure in each air spring by compressing and venting the system air. Increasing air pressure (compressing) raises the rear of the vehicle while decreasing air pressure (venting) lowers the rear of the vehicle. Vehicle height is maintained by the addition and removal of air in each air spring through an air spring solenoid installed in the upper spring cap and energized through the air suspension control module.
The air springs are mounted between the axle spring seats and the frame upper spring seats.
The two air springs replace the conventional rear coil springs.
Air Suspension Height Sensor
When the air suspension height sensor indicates that the rear of the vehicle is lower than trim under normal driving conditions, the air compressor will turn on and pump compressed air to the air springs. When the sensor indicates that the rear of the vehicle is raised above trim under normal driving conditions, this will cause the air to be vented from the air springs to lower the vehicle back to its trim height level.
One air suspension height sensor is mounted on the vehicle. The air suspension height sensor sends a voltage signal to the air suspension control module. The output ranges from approximately 4.75 volts at minimum height (when the vehicle is low or in full jounce), to 0.25 volts at maximum height (when the vehicle is high or in full rebound). The air suspension height sensor has a useable range of 80 mm (3 in) compared to total suspension travel of 200-250 mm (8 to 10 in) at the wheel. Therefore, the air suspension height sensor is mounted to the suspension at a point where full rear suspension travel at the wheel is relative to 80 mm of travel at the air suspension height sensor. The air suspension height sensor is attached between the No. 5 frame crossmember (upper socket) and the panhard rod (lower socket). Replace the air suspension height sensor as a unit.
Compressor Relay
The compressor relay is energized by the air suspension control module to allow high current to flow from the battery to the compressor motor.
  • A solid state relay is used in the air suspension system for air compressor control. The relay incorporates a custom power metal oxide semi-conductor field effect transistor (MOSFET) and ceramic hybrid circuitry. The relay switches high current loads in response to low power signals and is controlled by the logic of the air suspension control module.
Air Suspension Control Module
NOTE: The 4WAS air suspension control module is used for the RAS system. The internal processor recognizes external circuitry to determine if it is installed in a 4WAS or a RAS equipped vehicle.
NOTE: The air suspension control module is calibrated with information from the air suspension height sensor. A new or exchanged air suspension control module requires a ride height adjustment calibration process to be performed.
The air suspension control module controls the air compressor motor (through a solid state relay), and the air spring solenoids. The air suspension control module also provides power to the air suspension height sensor. The air suspension control module controls vehicle height adjustments by monitoring the air suspension height sensor, vehicle speed, a steering sensor, acceleration input, the door ajar signal, transfer case signals, and the brake pedal position (BPP) switch. The air suspension control module also conducts all fail-safe and diagnostic strategies and contains self-test and communication software for testing of the vehicle and related components.
The air suspension control module is mounted in the passenger compartment inside the instrument panel above the radio and temperature controls.
The air suspension control module monitors and controls the air suspension system through a 32-pin two-way connector. The air suspension control module is keyed so that the air suspension control module cannot be plugged into an incorrect harness. There are two sides of the harness connection to the air suspension control module. Each is uniquely colored and keyed to prevent reversing the connections.
Air Suspension Diagnostic Connector
The air suspension diagnostic connector is used to aid the technician in diagnosing the air suspension system. It is also used to vent the system of compressed air when air suspension system components need to be repaired or replaced. The air suspension diagnostic connector is located under steering column.

Posted on Oct 02, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

3 Answers

Air bag pump is running, new airbags . rear bags wont air up.


These Lincoln air suspensions are terrible. I have converted many over to coil springs at a fraction of the cost of replacing/repairing the bags. If the rear bags don't inflate, there is a broken air line to the bags or the bags are leaking

Apr 12, 2015 | 2001 Lincoln Navigator

2 Answers

1994 lincoln continental executive rear end goes down when the car is parked few hours.


When the key is off, the air suspension shouldn't lose any air, so you could have a valve leak in the system. I'm not familiar with all the components of the system, but did you check the valve that allows the system to bleed off pressure for leaks when the system is turned off?

Jan 13, 2014 | 2004 Lincoln Navigator

2 Answers

Linconl continental 1994 fron air suspension dont work


spray the bags and lines down with soapy water and look for a air leak also at the valve block under the hood i think napa has a kit to change them to a spring system cheaper then new bags

Aug 15, 2012 | 1994 Lincoln Continental

2 Answers

My rear suspension sags after 3 min of operation.The check air suspension light comes on. It goes off if shut down/ start the engine,Some one told me to change the shocks,what about the check light on...


Air suspension bags are probably leaking. air comp shuts off after 3 minutes because its working to hard. since bags are leaking rear than sags. This car has bags instead of shocks in rear. light comes on when comp turns it self off.

Jul 27, 2010 | 1999 Mercury Grand Marquis

1 Answer

Land Rover disco 2, rear suspension lower


SPRAY REAR AIR BAGS WITH SOAPY WATER AND LOCK FOR BUBBLES. dOES NEW PUMP KICK ON?

Apr 25, 2010 | 2004 Land Rover Discovery

1 Answer

Disco 2, 2002 model. Sudden lose of power and rpm not exceeding 3000. If idle the rpm goes to 3500. secondly, the rear suspension keeps on falling down after more than 5 minutes packing. What could be the...


Could well be a fueling issue, best to change the filters and try it again. If it's a TD5, the throttle potentiometer can go faulty and needs checking.
Your suspension issue will probably be a faulty air bag or valve block, and if you don't sort it your compressor will give up also. Check the bags with some soapy liquid and see if there are any bubbles. Typically this comes from the very top. Park on level ground, put the vehicle in extended mode and carefully apply the liquid to see.

Feb 10, 2010 | 2002 Land Rover Discovery Series II

1 Answer

2000 Expedition rear suspension randomly leaks and pumps up fine. Sometimes the compressor funs a lot. The bags have 150K on them, but don't look too bad, no metal showing.Leaks evenly. Can I replace the...


One of your rear bags has a pinhole in the rubber,therefore the pump is trying to compensate for the needed air.A easy was to diagnose a air leak in the system is to spray down the bags with glass cleaner and it will show you where the leak is.Id suggest that you replace the defective bag rather than convert it to standard suspension.

Jan 30, 2010 | 2000 Ford Expedition

1 Answer

Disco 2 rear air suspension problem


listen for air leaking from the bag or the air supply line

May 26, 2009 | 2001 Land Rover Discovery Series II

2 Answers

Air suspension keeps going down on one side


Hi paul in case you dont already know this is most likely due to a leaky air spring or connection to the same

Apr 08, 2009 | 1999 Land Rover Discovery

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

15 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...