This procedure replaces the electronic parking brake actuator on the rear brake caliper assembly, restoring proper parking brake function.

Warnings

Tools required

Parts

• Electronic parking brake actuator motor × 1 — Use OEM specification
• Parking brake actuator mounting hardware kit (if corroded) × 1 — Use OEM specification

Fluids

• Mopar DOT 4 Brake Fluid — 0.5 qt

Preparation

1. Park vehicle on level surface and place transmission in Park. Apply parking brake initially, then chock front wheels securely.
2. Connect scan tool and verify communication with electronic parking brake control module before beginning work.
3. Remove reservoir cap and extract approximately 1/4 of brake fluid from master cylinder reservoir to prevent overflow during piston retraction.
4. Loosen rear wheel lug nuts while vehicle is on ground.
5. Raise rear of vehicle with floor jack and support securely on jack stands rated for vehicle weight. Never work under vehicle supported only by jack.
6. Remove rear wheels completely and set aside.

Procedure

1. 1

   Enter parking brake service mode
   Using your scan tool, navigate to the electronic parking brake system and select 'Service Mode' or 'Retract Caliper Piston' function. This energizes the actuator motor to fully retract the piston and release spring tension. Wait for confirmation that service mode is active before proceeding. The actuator motor should audibly run for several seconds.
2. 2

   Remove brake caliper
   Identify the two caliper slide pin bolts on the rear of the caliper assembly. Remove both slide pin bolts using appropriate socket. Carefully pivot the caliper upward and off the brake rotor. Support the caliper with wire or a bungee cord—do NOT allow it to hang by the brake hose, as this can damage the hose internally.
   ⚠Never allow brake caliper to hang unsupported by the brake hose. Internal hose damage can cause brake failure.
   Torque spec

   Caliper Slide Pin Bolts35 Nm (26 lb-ft)
3. 3

   Disconnect parking brake actuator electrical connector
   Locate the electrical connector on the parking brake actuator motor mounted to the rear of the caliper. Press the release tab and carefully disconnect the connector. Inspect connector terminals for corrosion or damage. Clean if necessary with electrical contact cleaner.
4. 4

   Remove parking brake actuator mounting bolts
   Identify the mounting bolts securing the parking brake actuator motor to the rear caliper housing. On this application, there are typically two or three bolts. Remove all mounting bolts and carefully extract the actuator assembly from the caliper. Note the orientation and any shims or spacers present for reassembly.
   ⚠Actuator may still contain residual spring tension even in service mode. Control the actuator carefully as bolts are removed.
   Torque spec

   Mounting Bolts37 Nm (27 lb-ft)
5. 5

   Inspect caliper piston and mounting surface
   With actuator removed, inspect the caliper piston mechanism for damage, excessive corrosion, or binding. Check the actuator mounting surface on caliper for corrosion, damage, or stripped threads. Use wire brush to clean mounting surface thoroughly. Inspect the piston screw mechanism for damage or wear. If piston does not move smoothly or shows damage, the entire caliper may require replacement.
6. 6

   Install new parking brake actuator
   Position the new parking brake actuator onto the caliper housing, ensuring proper alignment of the actuator drive gear with the piston screw mechanism. Install any shims or spacers noted during removal. Install mounting bolts and tighten to specification. Ensure actuator seats fully against caliper housing with no gaps.
   ⚠Verify proper engagement of actuator drive gear with piston mechanism before tightening bolts. Misalignment will cause actuator failure.
   Torque spec

   Mounting Bolts37 Nm (27 lb-ft)
7. 7

   Reconnect electrical connector
   Reconnect the electrical connector to the new parking brake actuator motor. Ensure the connector locks securely with an audible click. Verify connector is fully seated and locked.
8. 8

   Reinstall brake caliper
   Clean caliper slide pins thoroughly and apply silicone brake grease to pins as specified. Position caliper over brake pads and rotor. Align caliper mounting holes with bracket. Install both caliper slide pin bolts and tighten to specification in a cross pattern.
   ⚠Use only silicone-based brake grease on slide pins. Other lubricants will damage rubber components and cause caliper seizure.
   Torque spec

   Caliper Slide Pin Bolts35 Nm (26 lb-ft)
9. 9

   Exit parking brake service mode and perform actuator learn procedure
   Using scan tool, exit service mode. The system will now perform an automatic calibration procedure. Select 'Parking Brake Calibration' or 'Actuator Learn' function on scan tool. Follow all prompts. The actuator will cycle through full range of motion multiple times. This process typically takes 2-3 minutes. Do not interrupt power or disconnect scan tool during this process.
   ⚠️Do not interrupt the calibration procedure. Loss of power during calibration can leave parking brake inoperative and require dealer-level reprogramming.
10. 10

    Check brake fluid level and bleed if necessary
    Check master cylinder reservoir and top off with DOT 4 brake fluid to proper level. If any air entered the system or fluid was lost, bleed the affected brake circuit using proper bleeding procedure. Start at the wheel furthest from master cylinder if full system bleeding is required.
    Torque spec

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

    Reinstall wheels and perform final torque
    Install rear wheels onto hubs. Install lug nuts and snug by hand. Lower vehicle until tire contacts ground but vehicle weight is not fully on suspension. Torque lug nuts to specification in a star pattern. Fully lower vehicle and remove jack stands. Perform final torque verification of lug nuts in star pattern.
    Torque spec

    Wheel Lug Nuts140 Nm (103 lb-ft)

Reassembly

1. Reassembly is covered in the main procedure steps above.
2. Ensure all electrical connectors are fully seated and locked.
3. Verify brake fluid level is between MIN and MAX marks on reservoir.
4. Install reservoir cap securely after fluid level verification.

Verification

• With scan tool still connected, verify no diagnostic trouble codes are present in parking brake system.
• Start engine and verify brake warning light extinguishes after approximately 2 seconds.
• With vehicle still in Park on level ground, use scan tool to command parking brake ON. Verify actuator engages (audible motor operation) and parking brake warning light illuminates.
• Attempt to move vehicle—it should be held securely by parking brake. If vehicle rolls, DO NOT DRIVE and repeat calibration procedure.
• Command parking brake OFF with scan tool. Verify actuator disengages and warning light extinguishes.
• Test drive vehicle in safe area at low speed. Apply parking brake electrically multiple times while stationary to verify proper engagement and release.
• Perform final verification that parking brake holds vehicle on a grade if safe area is available.
• Verify brake pedal feels firm and normal with no excessive travel or sponginess. If pedal is soft, system requires bleeding.

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