A 2018 Ram ProMaster 2500 experiencing a parasitic battery drain had its BCM replaced. After installation, communication issues arose with the new BCM, preventing programming and key fob registration. Standard diagnostic tools, including WiTech with CardaQ 3+ and an Autel IM608, couldn’t establish communication with the BCM or RFH. This article explores potential solutions and troubleshooting steps for this specific scenario focusing on utilizing a bcm scan tool for ProMaster vans.
Verifying Connections and Performing a Reset
Initial troubleshooting involved thorough checks of powers, grounds, and data lines connected to the BCM. Load testing and pin drag assessments revealed no faults. All other modules responded normally to diagnostic scans. A battery disconnect and global reset surprisingly restored communication, suggesting a potential conflict with the locksmith’s tool or software. However, the locksmith refused further assistance, citing a lack of understanding on the technician’s part.
Key Questions and Potential Solutions for BCM Replacement
Several crucial questions arise regarding programming the new BCM and restoring functionality:
WiTech and the 5-Digit PIN
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Is there a permanent 5-digit PIN for the BCM replacement utility in WiTech? Locating this PIN is crucial for accessing the necessary programming functions within WiTech.
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How can this 5-digit PIN be obtained? Understanding the process for retrieving this PIN will determine if in-house programming is possible.
Immobilizer Data and Remote Programming
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What is the purpose of the “copy immobilizer data” function in WiTech and how is the emailed data used? This function might hold the key to restoring the immobilizer data to the new BCM after entering the 5-digit PIN.
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Are there remote programming options for the immobilizer and rolling PIN? This could be a viable solution given the difficulty in finding a qualified locksmith in the area.
Key Fob Compatibility and Dealer Intervention
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Are the original key fobs locked to the original BCM? Knowing this will determine if new fobs need to be programmed or if the originals can be re-used.
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Is sending the vehicle to the dealership the only remaining option? While a last resort, understanding when dealer intervention is necessary is important.
Next Steps and Considerations When Using a bcm scan tool promaster
The immediate next step is to determine the availability and acquisition method for the 5-digit PIN required by WiTech for BCM replacement. Researching the “copy immobilizer data” process is also critical. Exploring remote programming options and key fob compatibility will further clarify the best course of action. While locksmith registration and NASTF account renewal are long-term solutions, immediate resolution requires addressing these specific programming hurdles. Contacting FCA (Fiat Chrysler Automobiles) directly or consulting with a specialized ProMaster technician might provide valuable insights. Successfully utilizing a Bcm Scan Tool Promaster requires in-depth knowledge and access to the right resources.
