B1667 ACURA, HONDA: REAR SHELF LF ANTENNA CIRCUIT SHORT CIRCUIT
POST UPDATED IN June, 2023
B1667 Code failures by brands
Description of DTC code B1667
The remote control has a keyless transmitter, and the remote control locks and unlocks the doors with the use of an operation that can be performed even from a remote distance from the automobile. When a remote lock button or remote unlock button is pressed, the keyless transmitter sends a signal from the corresponding switch to the keyless access control unit. After receiving authentication at the keyless access control unit, the door lock signals are sent to the MICU via the B-CAN.
The low frequency (LF) antennas of the front interior, the middle interior, and the rear interior are responsible for providing the proper signals to the remote control of the vehicle interior. The outside driver’s door handle, outside front passenger’s door handle, and rear bumper LF antennas, provides signals to the vehicle’s exterior remote control.
B1667 OBDII fault code is stored when a short is detected in the rear bumper LF antenna circuit.
Symptoms of fault code B1667
- Check Engine lamp illuminated.
Causes of OBD2 B1667
The reasons for setting the B1667 OBD2 diagnostic code are:
- The rear rack low frequency (LF) antenna circuit wires may be bad.
- The rear shelf low frequency (LF) antenna circuit may have damage to its electrical connections.
- The rear shelf LF antenna may be defective.
- The Keyless Access Control Unit could have been damaged.
Possible solutions of the DTC code B1667
In order to troubleshoot DTC B1667 OBDII take into account the following:
- Consult the TSB as a first step.
- Inspect all the cables related to the low frequency (LF) antenna of the rear rack. Check them for any deficiencies caused by corrosion or wear. If these or other conditions are found, make appropriate repairs.
- Using appropriate tools, perform electrical checks to the rear shelf low frequency (LF) antenna circuit. Look for conditions that produce a short or open circuit. Repair as applicable.
- Using the diagnostic steps outlined by the manufacturer in the information source, check the rear shelf low frequency (LF) antenna for proper condition. If you determine that it is inconsistent, make the appropriate adjustments.
