Air Suspension Valve Block

This procedure covers the removal and replacement of the air suspension valve block (manifold) on 2015-2020 Ford F-150 trucks equipped with factory air suspension systems.

Warnings

Tools required

Parts

• Air suspension valve block assembly × 1 — Use OEM Ford specification
• Air line O-ring seal kit × 1 — Ford air suspension service kit
• Valve block mounting grommets × 4 — Check condition, replace if damaged

Preparation

1. Park vehicle on level surface and apply parking brake
2. Place wheel chocks at front wheels
3. Use scan tool to enter air suspension diagnostics mode and set system to 'Service Mode' (deflates air springs)
4. Allow minimum 2 minutes for air springs to fully deflate
5. Raise rear of vehicle and support on jack stands at frame rails
6. Remove rear wheels for improved access if needed
7. Disconnect negative battery cable and wait 2 minutes for module capacitors to discharge
8. Locate valve block on passenger side frame rail, forward of rear axle centerline

Procedure

1. 1

   Disconnect electrical connector
   Locate the main electrical connector on top of the valve block. Press the red secondary lock tab upward to release position, then depress the primary connector lock tab while pulling the connector straight up and away from the valve block. Inspect connector terminals for corrosion or damage.
2. 2

   Disconnect compressor supply air line
   Locate the main supply line from the air compressor (typically the center or rear-most connection on the valve block). This is a larger diameter line than the individual spring lines. Press the collet release ring on the quick-connect fitting while pulling the air line straight out. A small amount of residual air may escape. Allow line to vent completely before proceeding.
   ⚠Residual pressure may cause air line to eject forcefully. Wear safety glasses and keep face away from connection point.
3. 3

   Disconnect rear air spring lines
   Identify the two air lines leading to the rear air springs (left and right). Use the appropriate quick-connect release tool for each fitting. Press the release ring and pull each air line straight out from the valve block. Mark or photograph line positions if connections are not color-coded or labeled to ensure correct reassembly.
4. 4

   Disconnect exhaust vent line
   Locate the exhaust/vent line connection on the valve block (typically a smaller diameter line routed toward the frame or downward). Release the quick-connect fitting and remove the vent line. This line allows the valve block to exhaust air when lowering the vehicle.
5. 5

   Remove valve block mounting fasteners
   Remove the mounting bolts securing the valve block bracket to the frame rail. The valve block is typically secured with 2-4 mounting bolts through rubber isolation grommets. Support the valve block with one hand while removing the final fastener to prevent it from falling.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
6. 6

   Remove valve block assembly
   Carefully lower the valve block assembly from the mounting location. Maneuver it clear of the frame and suspension components. Inspect the mounting bracket and rubber grommets for wear, cracks, or deterioration. Replace grommets if damaged.
7. 7

   Inspect and clean air line fittings
   Inspect all air line ends for damage, debris, or contamination. Check that O-rings are present and in good condition on each line end. Clean the external surface of each air line fitting with compressed air or clean shop towels. Do not introduce any lubricants or solvents that could contaminate the air system.
8. 8

   Prepare new valve block
   Remove protective caps from all ports on the new valve block. Verify all internal O-rings are properly seated in each port. Check that the electrical connector seal is present and undamaged. Transfer the mounting bracket from the old unit if not included with the replacement valve block.
9. 9

   Install valve block to frame
   Position the new valve block assembly into the frame mounting location. Install new or inspected mounting grommets. Hand-start all mounting bolts before tightening. Ensure the valve block is properly oriented with the electrical connector facing upward/outward for access.
   ℹ️Do not fully torque mounting bolts until all air lines are connected to prevent stress on fittings.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
10. 10

    Connect air spring lines
    Install the left and right rear air spring lines to their respective ports on the valve block. Push each line firmly into the quick-connect fitting until you feel and hear a positive click. Gently tug on each line to verify it is locked in place. Verify correct left/right orientation if lines are marked.
11. 11

    Connect compressor supply and exhaust lines
    Connect the main supply line from the air compressor to the valve block inlet port. Push firmly until the fitting clicks into place. Connect the exhaust vent line to its port. Verify all connections are secure by gently pulling on each line.
12. 12

    Final torque mounting bolts
    With all air lines connected and properly routed, torque the valve block mounting bolts to specification. Verify no air lines are kinked, pinched, or under tension from the mounting position.
    Torque spec

    Mounting Bolts34 Nm (25 lb-ft)
13. 13

    Connect electrical connector
    Align and press the electrical connector firmly onto the valve block connector pins until the primary lock clicks into place. Push the red secondary lock tab fully down to the locked position. Verify connector is fully seated with no gap between connector body and valve block.
14. 14

    Reconnect battery and initialize system
    Reconnect the negative battery cable. Turn the ignition to ON position without starting the engine. Use the scan tool to exit service mode and command the air suspension module to perform a self-test. Monitor for fault codes related to valve block operation, air leaks, or circuit faults.

Reassembly

1. Reinstall rear wheels if removed and torque lug nuts to specification in a star pattern
2. Lower vehicle to ground
3. Start engine and allow air suspension compressor to pressurize the system
4. Use scan tool to cycle each air spring individually and verify proper inflation/deflation
5. Clear any stored diagnostic trouble codes that may have been set during service
6. Road test vehicle and verify proper ride height control and system operation

Verification

• Verify no air leaks are present at any valve block connections by listening for hissing sounds with engine running
• Confirm vehicle achieves and maintains proper ride height at all suspension settings (normal, entry/exit, off-road if equipped)
• Use scan tool to verify valve block communication with air suspension module and no active fault codes
• Test ride height adjustment through full range of available settings
• Inspect valve block area after 24 hours of normal operation for any signs of air leaks or seepage
• Verify compressor does not cycle excessively (more than once every 10 minutes at idle), which would indicate a system leak

Related trouble codes on this vehicle

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