Description
Overview
The ABS control unit (ECU) and pump module for the Peugeot 206 is a critical brake system component designed for PSA vehicles. This assembly controls the hydraulic pump and valve block to modulate brake pressure and prevent wheel lock under heavy braking. The item is supplied with the wiring harness for direct installation.
Function And Common Symptoms
The ABS ECU monitors wheel speed sensors and operates the electric pump and solenoid valves to maintain vehicle stability under braking. Typical symptoms of a faulty unit include illuminated ABS warning light, loss of ABS functionality, unusual pump noise during braking cycles, or stored fault codes related to pump motor, valve circuits or communication errors on the CAN bus.
Causes Of Failure
Failures commonly arise from water ingress and connector corrosion, damaged wiring, internal electronic faults, or contamination of the hydraulic circuit. Thermal stress and aging of electronic components can also lead to intermittent or permanent malfunction.
Replacement And Installation
Replacement should be performed by a qualified mechanic or an experienced DIYer with appropriate tools. Basic steps:
- Disconnect the vehicle battery before work to avoid short circuits.
- Locate and access the ABS unit (location may vary by submodel; often near the brake master cylinder or inside protected engine-bay housing).
- Disconnect electrical connectors and brake lines (cap lines to prevent contamination).
- Unbolt the module from its mounting points and remove the unit.
- Fit the replacement module, securing all bolts to manufacturer torque; reconnect brake lines and electrical connectors.
- Bleed the brake system thoroughly to remove air from the hydraulic circuit.
- Use a diagnostic tool to clear fault codes and verify ABS operation. The unit may require coding or parameterization with PSA diagnostic software (DiagBox/Lexia) or an equivalent scanner to match vehicle configuration.
Maintenance Tips
Protect connectors from moisture and ensure sensor wiring is intact to prolong ECU life. After any brake-line work or ECU replacement always bleed the brakes and run a diagnostic scan to confirm no stored faults remain.
Technical Information
- Manufacturer: PSA (Citroën / Peugeot)
- Model: Peugeot 206
- Product Codes: 9652342980; 10.0970-1114.3; 10.0207-0036.4
- Other Numbers: 4541V5; 4541V6; 4541RW; 4542J8; 4542Z0; 4542J9
Compatibility And Notes
Confirm fitment by VIN or vehicle build data before purchase. Some ABS ECU units require diagnostic coding to the vehicle to restore full functionality and compatibility with immobilizer or vehicle-specific ABS parameters. If uncertain, consult a PSA-compatible diagnostic tool or professional workshop.
