Yanhua ACDP Module 1 – BMW CAS1-CAS4+ Key Programming & Odometer Reset

Overview

ACDP CAS Module Functions

1. Supports CAS1–CAS4+ IMMO key programming and mileage reset via OBD mode
2. Supports CAS3+/3++ and CAS4/CAS4+ key programming and mileage reset via ICP — no pin lifting, no component removal, with intelligent pin detection
3. Supports CAS1–CAS4+ data restore, including vehicle frequency modification, VIN modification, ISN code changes, and CAS module replacement via EE data editing
4. Supports OBD restore for CAS3/CAS3+/CAS3++ issues caused by downgrade operations
5. Supports CAS1–CAS4+ EEPROM and flash data read/write

Important Notices

1. For All Keys Lost operations, ACDP ISN Module 3 must be purchased separately
2. This module supports mileage correction for the CAS system only — for dashboard mileage adjustment, ACDP 35XX Module 4 must be purchased separately
3. For CAS1–CAS4+ OBD-only operation, the A500 License for BMW CAS1–CAS4+ Key Programming via OBD can be purchased separately without adapters
4. This module cannot operate independently — requires ACDP-1 or ACDP-2 as the base unit

ACDP Module 1 Features

1. Supports CAS1–CAS4+ IMMO key programming and mileage reset via OBD mode
2. Supports 9S12DXP512 and 9S12XEP100 chip models
3. No CAS version downgrade required
4. Significantly faster and safer — operation time reduced from dozens of minutes to just a few minutes

CAS1–CAS3+ Supported Operations

• Key programming via OBD
• Read CAS EEPROM
• Add keys
• Reset mileage
• Backup and restore CAS
• All Keys Lost

CAS4 / CAS4+ Supported Operations — All Solder-Free

• Read CAS4 EEPROM
• Add keys
• Reset mileage
• Backup and restore CAS
• All Keys Lost

CAS1–CAS4+ Mileage Programming — No Invasive Steps Required

• No chip removal
• No soldering
• No line cutting
• No pin lifting

Connection Diagram

ICP

CAS4/4+ OBD APP Screen

ICP APP Screen

ACDP CAS Module vs Traditional Methods – CAS4 Data Read/Write

Traditional Method (Other Devices) — Soldering Required
Conventional tools rely on one or more of the following invasive procedures to read and write CAS4 data:

1. Line Cutting
   Two PCB lines must be cut before reading or writing data, then soldered back once the operation is complete. Line cutting carries a real risk of permanent module damage.

Component Removal

Four components must be desoldered from the board before the operation and soldered back afterward. This is a lengthy, complex process with significant room for error.

Pin Lifting
Chip pins must be lifted for wiring, then soldered back after the operation. Chip pins are fragile and break easily during lifting, making this one of the riskiest steps in the traditional workflow.

Disadvantages of the Traditional Method

1. Soldering is required throughout — a complex, time-consuming process that demands technical skill
2. Line cutting, pin lifting, and component removal all introduce a real risk of permanent module damage
3. Manual soldering is inherently unreliable — any faulty solder joint can result in data loss or board failure

With Yanhua ACDP Module 1 — No Soldering, No Risk

The ACDP interface board connects directly to the CAS4 module without any line cutting, pin lifting, component removal, or soldering — eliminating all risks associated with the traditional method and completing the operation in a fraction of the time.

ACDP CAS Module – ICP Data Read/Write Advantages

1. Dedicated interface board replaces soldering entirely, making the operation simpler and more efficient
2. No line cutting, no pin lifting, no component removal, and no soldering required
3. Intelligent pin detection ensures safe and reliable data reading and writing throughout every operation

Yanhua ACDP CAS Module Update for Free Read/Write CAS ISN(Replace DME)

ACDP CAS4 OBD Function Free Update

Yanhua Mini ACDP BMW CAS Module 1 Free Update

ACDP CAS1–CAS4+ Configuration Package List

Important Note on CAS1 & CAS2 Interface Boards

Since CAS1 and CAS2 key matching can be performed directly via OBD, the CAS1 and CAS2 interface boards are not included in the standard CAS Module package. These boards are available as a separate purchase and are only required if you need to read data independently or perform mileage correction on CAS1 or CAS2 modules.