Acura B1905: Immobilizer-Keyless Control Unit Lost Communication with Driver's MPCS Unit (DRLOCKSW Message)
Is your scanner showing Acura B1905?
No worries. We'll show you what it means and how to deal with it.
Acura B1905: Immobilizer-Keyless Control Unit Lost Communication with Driver's MPCS Unit (DRLOCKSW Message)
OVERVIEWWhat Does The Acura B1905 Code Mean?
Poor communication between the Immobilizer-Keyless Control Unit and the Driver’s MPCS unit.
NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
If DTCs B1013, B1065, B1182, and/or B1356 are also indicated, perform the driver’s MPCS unit input test.
If no additional codes are present, perform the Immobilizer-Keyless Control Unit input test.
What Are The Potential Causes Of The Acura B1905 Code?
- Loose or poor connections between the Immobilizer-Keyless Control Unit and the Driver’s MPCS unit
- Blown fuse in the main under-hood fuse box
- Blown fuse in the under-dash fuse/relay box
- “Open” or “Short” to ground
- Faulty Driver’s MPCS unit
- Faulty Immobilizer-Keyless Control Unit
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> Acura Under-dash Fuse/Relay Box
>>> Twippo 372Pcs Waterproof Wire Connectors Kit
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
Acura B1905, DTCDECODE.
