Overview

This central locking controller (central locking module) is designed for Citroën/Peugeot vehicles and manages door locking and unlocking functions, remote key signals and the actuators that physically lock the doors. It is a direct-fit replacement for vehicles listed below and is commonly searched by product codes 96553146ZD and 6554XZ. The description and references make this part especially relevant for professional mechanics and experienced DIYers working on Citroën C4 Picasso and Grand Picasso models.

Function And Symptoms

The module Processes Input From Remote Controls, Door Switches And The Vehicle Network To Command Door Actuators. Typical Symptoms Of A Faulty Unit Include Intermittent Or Complete Loss Of Lock/Unlock Function, Doors Locking Or Unlocking Spontaneously, Central Locking Only Working From One Door, Or Blown Fuses Associated With The Locking Circuit. Diagnostic Steps Usually Include Visual Inspection Of Connectors, Checking Related Fuses And Measuring Signal Presence At Connectors Before Replacing The Module.

Installation And Replacement

Replacement Requires Access To The Module Location (Often Behind Glovebox, Under Dashboard Or In A Central Fuse/Control Module Area Depending On Model Year). Procedure Summary For Experienced Technicians:

• Disconnect Battery Before Any Work.
• Remove Necessary Trim Panels To Reach Module.
• Label And Disconnect Electrical Connectors Carefully.
• Swap Old Module With New Unit And Reconnect Connectors Securely.
• Reassemble Trim And Reconnect Battery.

After Installation Some Vehicles May Require Initialization, Adaptation Or Coding So The Module Communicates Correctly With The Vehicle Network And Recognizes Keys/Remotes. See The Important Coding Note Below If This Unit Is A Comfort/BSI Type.

Installation And Coding – Important

– The Unit Is Used And May Be Paired With The Original Vehicle (VIN/PIN/Keys).
– Possible Commissioning Options:
1) Cloning Data From The Old Unit (EEPROM/Flash) – After Cloning The Unit Is Plug And Play.
2) Virginization And Subsequent Initialization/Telecoding Via DiagBox (Or Online) + Key Adaptation.
– Recommended To Be Performed By A Professional With PSA Service Equipment (DiagBox/Lexia/PP2000).
– Always Disconnect The Battery Before Removal/Installation And Follow Manufacturer Procedures To Avoid Damage To The Unit.

Technical Information

Manufacturer: Stellantis / Citroën / Peugeot
Model: Citroën C4 Picasso, Grand Picasso (up to 2013)
Product Codes: 96553146ZD, 6554XZ
Other Numbers: 6554XZ | 96553146ZD

Recommendations For Installation

Always Work In A Dry, Clean Environment To Reduce The Risk Of Corrosion And Moisture Ingress During Installation. Use Proper Trim Tools To Avoid Damaging Clips And Panels. Verify Connector Pins For Corrosion Or Bent Contacts Before Installing The New Module. If The Vehicle Requires Coding Or Key Adaptation, Use Appropriate PSA Diagnostic Tools Or Entrust The Task To A Workshop With The Required Software.

Why The Part Most Often Fails

Common Causes Of Failure Include Moisture Ingress And Corrosion Of Electrical Contacts, Short Circuits Or Electrical Surges, Faulty Door Actuators Causing Excessive Load On The Module, And Physical Damage From Impact Or Improper Removal. Age-Related Wear And Contaminants In The Vehicle Environment Can Also Lead To Intermittent Faults That Eventually Become Permanent.

Who Should Fit This Part

This Module Is Intended For Professional Mechanics And Confident DIY Enthusiasts Comfortable With Vehicle Electrical Systems And Diagnostic Equipment. Proper Diagnosis And Correct Coding/Initialization Are Crucial For Full Functionality.