B1645 ACURA, HONDA: DRIVER DOOR LF ANTENNA CIRCUIT SHORT
POST UPDATED IN February, 2023
B1645 ACURA, HONDA: DRIVER DOOR LF ANTENNA CIRCUIT SHORT
The Remote Control System consists of a keyless transmitter. By performing a one-button operation all the doors can be locked or unlocked. This process can be done from the vehicle remotely. The keyless transmitter sends a corresponding switching signal to the Keyless Access Control Unit. This process occurs If the remote lock or unlock button is activated. By the time authentication is received at the control unit, the MICU via B-CAN receives the door lock signals.
The low-frequency (LF) antenna of the front interior, the middle interior, and the rear interior provide signals to the car interior remote control. The outside driver’s door handle, outside front passenger’s door handle, and the rear bumper LF antennas, send signals to the remote control outside the vehicle.
When the B1645 OBDII diagnostic code is stored, it means that a short was detected in the driver’s door LF antenna circuit.
OBD2 fault code B1645 is set by the following:
To troubleshoot the DTC B1645 OBDII code, try this: