I need to replace the ABS Control Module. Volkswagen doesn’t make that part anymore so I have to find it online and order it. The name that comes up in my search results is ABS Anti-lock brake pump assembly. Is that the same thing? Is the control module a part of the complete assembly?
I am not certain. Would need to ask the seller of the product. If you are buying it from a junk yard you may need to ask if it comes with the control module or not.
Models can be equipped with Anti-lock Brake System (ABS), Anti-slip Regulation (ASR), Electronic Differential Lock (EDL), Automatic Stability Control (ASC), Electronic Stabilization Program (ESP).
ROUTAN ABS Control module Replacement
Integrated Control Unit (ICU), Anti-Lock Brake Module (ABM)
- Depress brake pedal with brake pedal holding tool past its first inch of travel and hold it in this position. Holding pedal in this position will isolate master cylinder from hydraulic brake system and will not allow brake fluid to drain out of brake fluid reservoir while brake lines are open.
- Remove primary and secondary brake tubes (from master cylinder) at hydraulic control unit.
- Remove remaining brake tubes at hydraulic control unit.
- Use figure to release ABM harness connector cover. It shows location of release tabs.
- Disconnect ABM harness connector from module.
- Pull outward and upward on lower half of cover until it locks into point straight outward. The connector can then be pulled straight off ABM
- Remove single mounting bolt securing ICU to mounting bracket.
- Lift ICU off mounting bracket, dislocating mounting pins from grommets in bracket.
- Reverse procedure to install, noting the following:
a. Position ICU above mounting bracket in vehicle. Insert mounting pins on ICU into grommets mounted in bracket, then install single mounting bolt then torque to 97 inch lbs.
b. Before installing ABM harness connector on ABM, be sure seal is properly installed in connector.
c. Insert ABM wing harness connector into socket of ABM and close cover, locking connector in place.
d. Install four chassis brake tubes (2,3,5,6) brake tubes at ICU hydraulic control unit (7). Tighten tube nuts 120 inch lbs..
e. Install primary (4) and secondary (1) brake tubes at ICU hydraulic control unit (7). Tighten tubes nuts to 120 inch lbs.
f. Remove brake pedal holding tool.
g. Bleed brakes.
h. Code radio.
i. Calibrate control module using VAS 5051 and follow on screen instructions.
ABS Hydraulic Unit
For ease of service it is recommended that the modulator unit be removed and installed as an assembly with the brake vacuum booster.
- Disconnect all electrical connectors from ABS hydraulic unit.
- Remove brake fluid from reservoir.
- Disconnect and plug fluid lines from ABS hydraulic unit.
- Remove any lefthand side under dash panels required to access brake pedal.
- On Golf , GTI and Jetta models, disconnect brake booster pushrod from pedal as follows:
a. Remove brake lamp switch.
b. Push down on brake pedal and hold, then install pushrod disconnecting tool No. 3289, or equivalent.
c. Pull tool toward rear and into pedal socket until seated while holding pedal stationary.
d. Pull tool and pedal together to rear until pedal pops off ball of booster pushrod. - On Passat models, disconnect clip from clevis pin, remove pin, then pull pedal from pushrod clevis.
- On all models, remove nuts retaining booster to bulkhead, then remove assembly.
- Remove and install components from assembly as required to effect repair.
- Install assembly to bulkhead, install mounting nuts, then torque nuts to 18 ft. lbs.
- Install pedal to pushrod, align ball and socket, then push in until they pop together.
SYSTEM SERVICE
BRAKE SYSTEM BLEED
Conventional Bleed
- Connect suitable bottle with transparent hose to each wheel.
- Pump brake pedal several times, then hold.
- Open and close bleeder screw, then release pedal.
- Bleed brake system using the following sequence:
a. Lefthand front caliper.
b. Righthand front caliper.
c. Lefthand rear caliper/wheel cylinder.
d. Righthand rear caliper/wheel cylinder. - Repeat procedure until brake fluid flows without air bubbles.
Pressure Bleed - Connect brake filling and bleeding unit tool No. US 1116, or equivalent.
- On models equipped with brake pressure regulator, press regulator toward rear of vehicle when bleeding brakes.
- On all models, open bleeder screw and bleed brakes using the following sequence:
a. Lefthand front caliper.
b. Righthand front caliper.
c. Lefthand rear caliper/wheel cylinder.
d. Righthand rear caliper/wheel cylinder.
Scan Tool Bleed - Connect a VAG 1551 scan tool to Diagnostic Link Connector (DLC) and follow manufacturer’s instructions on screen.
- Connect a suitable pressure brake bleeder following pressure bleeder manufacturer’s instructions.
- Access “Brake Electronics,” then “Basic Settings” using scan tool.
- Follow step by step procedure of scan tool to bleed brakes.
COMPONENT REPLACEMENT
Bosch 5.3, ITT Mark 20 ABS control modules are coded to the vehicle.
Prior to servicing the ABS system, always turn the ignition off.
The ABS control unit must never be exposed to temperatures greater than 185°F for more than two hours, or 203°F for even short time periods. The ABS control unit must be unplugged if an electric welder is to be used on the vehicle.
Control Module
When replacing hydraulic components, ensure all areas to be disassembled are clean before starting. Place all removed components on a clean surface. Always cover and plug components if the repair cannot be completed immediately. Ensure all replacement components are thoroughly cleaned before installation. Use care not to allow brake fluid to contact painted surfaces or electrical connectors.
Ensure all components and lines are connected in their original position. Do not allow lines to become crossed.
Always connect a suitable scan tool to ABS system and inspect for any stored Diagnostic Trouble Codes (DTC) before disconnecting control module.
Bosch 5.3, ITT Mark 20 ABS control modules are coded to the vehicle. Replacement control modules must be coded after installation.