This procedure covers the removal and replacement of the ABS pump module on a 2024 Rivian EDV 500 electric delivery van, including brake fluid evacuation and system bleeding.

Warnings

Tools required

Parts

• ABS pump/modulator assembly × 1 — Use OEM specification
• Brake line sealing washers × 6 — Use OEM specification
• ABS pump mounting hardware kit × 1 — Use OEM specification

Fluids

• DOT 4 Brake Fluid — 2 qt

Preparation

1. Park vehicle on level surface and apply parking brake
2. Place wheel chocks at rear wheels
3. Locate 12V battery access panel in driver side dash compartment
4. Disconnect 12V negative battery terminal and wait 15 minutes for system capacitor discharge
5. Raise and support front of vehicle on jack stands at designated lift points
6. Remove front wheels to access wheel speed sensors if additional access is needed
7. Locate ABS pump assembly in left front wheel well area behind splash shield
8. Prepare clean workspace and containers for brake fluid collection

Procedure

1. 1

   Remove front left wheel well liner access panel
   Remove the plastic fasteners securing the front section of the left wheel well liner using T30 Torx bit. Pull back liner to expose ABS pump module and brake lines. The pump is mounted to the frame rail behind the front suspension.
2. 2

   Disconnect ABS pump electrical connector
   Locate the large multi-pin connector on top of the ABS pump assembly. Press the red safety tab down, then press the connector release tab while pulling the connector straight up and away from the pump. Secure connector away from work area to prevent contamination.
3. 3

   Relieve brake system pressure
   With battery still disconnected, pump brake pedal 20-30 times until pedal becomes firm and hard. This depletes the residual pressure in the ABS accumulator. Verify pedal remains hard without sinking.
4. 4

   Evacuate brake fluid from reservoir
   Using brake fluid evacuation pump, remove as much brake fluid as possible from the master cylinder reservoir. This minimizes spillage when disconnecting lines. Leave approximately 1 inch of fluid to prevent air from entering master cylinder.
5. 5

   Disconnect inlet brake lines
   Using appropriate flare nut wrenches, carefully loosen and remove the two inlet brake lines from the bottom of the ABS pump. These come from the master cylinder. Immediately cap open ports with clean plastic plugs to prevent fluid loss and contamination. Expect some fluid drainage.
6. 6

   Disconnect outlet brake lines
   Disconnect the four outlet brake lines from the ABS pump assembly (one to each wheel). Use flare nut wrenches to avoid rounding fittings. Cap all open lines and ports immediately. Note routing and orientation of each line for reinstallation.
7. 7

   Remove ABS pump mounting fasteners
   Remove the three mounting bolts securing the ABS pump assembly to the frame bracket using 13mm socket. Support the pump assembly weight while removing the final bolt as the unit weighs approximately 8 lbs when full of fluid.
8. 8

   Remove ABS pump assembly
   Carefully lower and remove the ABS pump assembly from the mounting bracket. Keep unit upright to minimize fluid spillage. Place in brake fluid catch container. Inspect mounting bracket for damage or corrosion and clean mounting surface.
9. 9

   Prepare new ABS pump for installation
   Remove new ABS pump from packaging. Verify part number matches original unit. Remove protective caps from all brake line ports just before connection. Install new sealing washers on all brake line fittings.
10. 10

    Install new ABS pump assembly
    Position new ABS pump assembly into mounting bracket, aligning mounting holes. Install three mounting bolts and tighten in star pattern to ensure even seating. Hand-tighten initially, then torque evenly (torque specification not available in database - follow manufacturer service manual).
11. 11

    Reconnect brake lines
    Remove caps from brake line ports. Connect inlet lines from master cylinder first, then connect four outlet lines to wheels. Ensure each line is threaded properly before tightening. Tighten all fittings with flare nut wrenches to prevent damage. Verify each connection is secure and properly seated with new sealing washers.
12. 12

    Reconnect electrical connector
    Align and press the ABS pump electrical connector firmly onto the pump module until it clicks into place. Ensure red safety lock tab engages completely. Gently tug connector to verify secure connection.
13. 13

    Refill and manually bleed brake system
    Fill master cylinder reservoir with fresh DOT 4 brake fluid to MAX line. Beginning with right rear wheel, then left rear, right front, left front, manually bleed each wheel using traditional bleeding method. Maintain reservoir level throughout process. Continue until fluid runs clear with no air bubbles at each wheel.
14. 14

    Perform ABS system automated bleed procedure
    Reconnect 12V battery. Connect scan tool and navigate to ABS system bleeding function. Follow scan tool prompts to activate ABS pump and cycle valves. This will purge air from internal ABS passages. Monitor brake fluid reservoir and refill as needed during procedure. Complete all scan tool bleeding cycles as directed.
15. 15

    Test brake system operation
    With engine off, pump brake pedal to verify firm pedal feel. Pedal should be firm within 3-4 pumps and hold steady. Start vehicle (12V systems active) and verify ABS warning light extinguishes after self-test. Perform low-speed brake test (under 5 mph) to verify proper brake function before road test.

Reassembly

1. Reinstall wheel well liner access panel with all plastic fasteners
2. Reinstall front wheels and torque lug nuts to specification
3. Lower vehicle from jack stands
4. Top off brake fluid reservoir to MAX line with DOT 4 fluid
5. Verify all brake line connections are dry with no signs of leakage
6. Clear any ABS fault codes stored in system using scan tool

Verification

• Start vehicle and verify ABS warning light functions normally (illuminates briefly then extinguishes)
• Check brake fluid reservoir level is at MAX line
• Inspect all brake line connections at ABS pump for leaks with engine running
• Test brake pedal feel - should be firm and consistent without sinking
• Perform controlled brake application test at low speed (5-10 mph) in safe area
• Perform ABS function test at appropriate speed in safe area - system should activate without pulling or abnormal noise
• Use scan tool to verify no active ABS fault codes
• Road test vehicle and verify normal brake operation under various conditions
• Recheck brake fluid level after road test and top off if needed

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