This procedure covers the removal and replacement of the ABS pump/modulator assembly on a 2012-2017 Toyota Camry with the 2.5L I4 engine, including brake line disconnection, electrical connector removal, and brake system bleeding.

Warnings

Tools required

Parts

• ABS pump/modulator assembly × 1 — Use OEM specification - Toyota part 44510-06180 or equivalent
• Brake line sealing washers × 6 — Use OEM specification

Fluids

• DOT 3 Brake Fluid — 1 qt

Preparation

1. Park vehicle on level surface and engage parking brake
2. Disconnect negative battery terminal and wait 90 seconds for airbag system to discharge
3. Remove engine cover if equipped
4. Open brake fluid reservoir cap to relieve pressure and facilitate line removal
5. Place drain pan under ABS pump area to catch brake fluid
6. Prepare brake line plugs or caps to minimize fluid loss when lines are disconnected

Procedure

1. 1

   Access the ABS pump assembly
   The ABS pump is located in the engine compartment on the driver side near the firewall. Remove the air intake duct if it obstructs access. On some models, you may need to remove the battery or battery tray for better access. Remove any engine covers or plastic shields blocking access to the pump.
2. 2

   Disconnect electrical connectors
   Locate the main ABS pump electrical connector on the side of the pump assembly. Press the locking tab and carefully disconnect the connector. On some models there may be multiple connectors. Mark connector orientation if needed for reassembly. Secure connectors away from work area.
3. 3

   Label and disconnect brake lines
   There are typically 4-6 brake lines connected to the ABS pump. Use a marker or tape to label each brake line and its corresponding port on the pump for correct reinstallation. Place shop towels around the work area to catch brake fluid. Using the appropriate flare nut wrench (typically 10mm or 11mm), carefully loosen each brake line fitting. Work slowly to avoid rounding off the fittings. Once loosened, unscrew by hand and immediately cap or plug each line and port to minimize fluid loss and contamination.
   ⚠Use only flare nut wrenches on brake line fittings to prevent rounding. Standard open-end wrenches will likely damage the soft metal fittings.
4. 4

   Remove mounting bolts
   Locate the ABS pump mounting bolts (typically two or three 12mm bolts). Support the pump with one hand while removing the final bolt as the assembly is heavy. Remove all mounting bolts and carefully lift the ABS pump assembly out of the engine bay. Note the orientation and position of any mounting brackets or spacers.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
5. 5

   Prepare new ABS pump
   Inspect the new ABS pump to ensure it matches the old unit exactly. Check that all ports and electrical connectors are identical. Clean the mounting surface on the vehicle where the pump sits using a wire brush or shop towel. Ensure no debris or old gasket material remains. Install new brake line sealing washers on each port of the new pump.
6. 6

   Install new ABS pump assembly
   Position the new ABS pump in the mounting location, ensuring proper orientation and alignment with mounting holes. Install mounting bolts hand-tight first to ensure all bolts thread properly, then torque to specification in a cross pattern.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
7. 7

   Reconnect brake lines
   Remove plugs from brake lines and pump ports. Referring to your labels from disassembly, thread each brake line into its correct port by hand first to ensure proper threading. Once all lines are hand-tight, use the flare nut wrench to snug each fitting. Tighten brake line fittings to approximately 15 Nm (11 lb-ft) - do not overtighten as this can damage the fittings and cause leaks. Work in a pattern to ensure even tightening.
   ⚠Brake line fittings should be snug but not overtightened. Excessive torque will strip threads or crack fittings.
8. 8

   Reconnect electrical connectors
   Reconnect the ABS pump electrical connector, ensuring it clicks fully into place and the locking tab engages. Verify the connector is secure by gently pulling on it. Reconnect any additional connectors if applicable.
9. 9

   Refill brake fluid reservoir
   Fill the brake master cylinder reservoir with fresh DOT 3 brake fluid to the MAX line. Keep the reservoir topped off throughout the bleeding process to prevent introducing air into the system.
10. 10

    Bleed brake system - conventional method
    Begin bleeding brakes starting with the wheel furthest from the master cylinder (typically right rear, then left rear, then right front, then left front). At each wheel, attach a clear tube to the bleeder screw with the other end submerged in a container of clean brake fluid. Have an assistant press the brake pedal slowly and hold, then open the bleeder screw briefly to release fluid and air. Close bleeder before pedal reaches floor. Repeat until no air bubbles appear. Check and refill reservoir frequently.
    ⚠Never let the brake pedal go to the floor with bleeder open as this can damage the master cylinder.
    Torque spec

    Bleeder Screw10 Nm (7 lb-ft)
11. 11

    Perform ABS system bleeding
    Connect an OBD-II scan tool capable of ABS functions. Navigate to the ABS bleeding function (sometimes called ABS actuator test or pump activation). The scan tool will command the ABS pump to cycle, opening internal valves that cannot be accessed through conventional bleeding. While the scan tool is cycling the pump, continue bleeding at each wheel as in the previous step. Run this cycle 2-3 times or until firm pedal is achieved. Top off brake fluid reservoir to MAX line when complete.
12. 12

    Clear ABS codes and verify operation
    Use the scan tool to clear any stored ABS fault codes. Reconnect the negative battery terminal. Start the vehicle and verify the ABS warning light illuminates briefly then goes out (normal bulb check). If the ABS light remains on, recheck all connections and bleed procedures. Test brake pedal feel - it should be firm with no sponginess.

Reassembly

1. Reinstall any removed components such as air intake ducts, battery, or engine covers
2. Double-check all brake line connections for tightness and signs of leakage
3. Verify brake fluid reservoir is at proper level and cap is securely installed
4. Ensure all electrical connectors are fully seated and locked
5. Check brake pedal feel before moving vehicle

Verification

• Start engine and verify ABS warning light turns off after initial bulb check
• Check all brake line connections for leaks while assistant presses brake pedal firmly
• Test brake pedal feel - should be firm and not spongy
• Perform a low-speed test drive in a safe area, testing normal braking function
• Perform a controlled ABS activation test on a safe surface (gravel or wet pavement) at low speed to verify ABS system engages properly
• Recheck brake fluid level after test drive and top off if necessary
• Verify no warning lights are illuminated on dashboard

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