Front Air Lines
FRONT AIR LINES
WARNING: All pressurized air suspension components contain high pressure air (up to 220 psig). Use extreme caution when inspecting for leaks. Wear safety goggles and adequate protective clothing when inspecting or servicing the air suspension system. A sudden release of air under this amount of pressure can cause personal injury or death.
WARNING: Support the vehicle by supplemental means before performing any work on the air suspension system to prevent the vehicle from changing height. Before any given component is to be serviced it must be deflated. Servicing the air suspension system without supplemental support, or with pressure in the specific component, can cause personal injury or death.
CAUTION: When removing an air line from a component and the air line is to be reused, do not remove the 90° fitting or the brass fitting from the air line. If either is removed, the air line must be replaced. New components have air line fittings attached; however if the original air line is used the original fitting must also be used. Do not remove protective caps or plugs from air lines or components until ready to install the air line to prevent moisture or dirt intrusion. All air line fittings must be hand started to avoid cross threading.
CAUTION: Pay special attention to the air line/bundle routing during the removal process for proper routing during installation. The air lines must be routed the same when installed AND connected to all routing clips during installation or a leak may result.
NOTE: New fittings must be used with new air lines, and new air lines do not include new fittings.
1. Raise and support the vehicle Maintenance.
2. With a scan tool, using the routines under the Air Suspension Control Module (ASCM), perform the following:
- Deflate the complete system to atmosphere.
- Disable the air suspension system.
3. Disconnect and isolate the negative battery cable Negative Cable.
4. Remove the RF wheel.
5. Remove the RF wheelhouse splash shield Splash Shield - Removal.
NOTE: The front and rear spring air lines are removed for clarity.
6. Remove the air spring air lines (4) at the valve block (5).
7. Remove the reservoir air line (3) at the air line adapter (2).
8. Remove the routing clip (1) at the harness loom.
9. Lower the vehicle enough to access inside of vehicle.
10. Inside the vehicle, remove the RH instrument panel lower insulator.
11. Pull back the carpet for access to the air line connectors (1, 2).
NOTE: The connector locking tabs under the instrument panel are color coded for identification. The reservoir locking tab is black, the RR is green, and the LR is white.
12. Release the locking tabs and disconnect the air lines (1, 2) under the RH side of the IP.
NOTE: Pay special attention to the air suspension harness (2) routing between wiring harness (1) and body for proper routing during installation.
13. From the engine compartment, pull the air suspension air line bundle (2) up through the wiring harness (1) to access the bundle in the engine compartment.
14. Remove the cowl extension silencer.
15. Remove the nuts (2) that secure the HVAC air inlet duct (1) to the engine compartment side of the dash panel (3) and remove the duct (1).
CAUTION: Only remove the air line fitting (hex portion) and not the Pressure Retention Valve (round portion) of the brass assembly on top of the air suspension spring and shock assembly. Removing and reinstalling the valve (round) part of the assembly may cause a leak.
16. Disconnect the air lines/fittings (1) from both air suspension spring and shock assemblies.
17. From under the hood, remove the air suspension air line bundle from the wiring harness routing clip (1) below the battery positive cable jump post.
18. Remove the LF air line (2) from the routing clip (3) below the battery positive cable jump post.
NOTE: Record which color coded air line comes from each grommet hole for proper installation.
19. Pull the air lines (4) through the grommet in the cowl.
20. Remove the LF air line from the seven routing clips behind the engine/cowl heat insulator.
21. Remove the LF air line from the three air line routing clips below and to the left of the brake booster assembly.
22. Pull the brake line (2) toward the fender enough to pull the LF air line (1) from under the brake line (2) and out of the routing bracket (3).
23. Disconnect the master cylinder fluid level switch connector (5) and brake booster vacuum switch electrical connector (4).
24. Move the LF air line (1), air spring assembly side, forward and to the right of the master cylinder for ease of routing behind engine/cowl heat insulator.
25. Remove the front air line bundle from the vehicle by pulling the LF air line (1) from the right side, while feeding from the left side to route the LF air line (1) from under the steering column shaft (not shown), AC lines (3) and heater hoses (2), and from behind the engine/cowl heat insulator.