Hyundai blind spot detection not working — TSB fix
Hyundai blind spot detection not working and the latest Hyundai TSB fix
Hyundai has issued a service bulletin #22-BE-003H to address multiple issues with the blind spot detection system. It appears that shorts in the wiring is the cause of the Hyundai blind spot detection not working. The service bulletin describes to to locate the shorts and fix the problem.
The service bulletin addresses situations where any of these trouble codes may be present
C120D15 – Left Led Circuit Short To B
C120B15 – Right Led Circuit Short To B Or Open
C160A88 – BSD Local CAN bus off
C164C87- Local CAN time-out Rear Right
C164D87- Local CAN time-out Rear Left
BSD=Blind spot detection
BCW=Blind spot collision warning
Where to start the diagnosis of a Hyundai blind spot detection system not working
If you have a C120D15 or C120B15 trouble code, start here
C120D15 – Left LED Circuit Short To B.
This code sets when there is an electrical connection issue between the left side mirror BCW/BSD LED light indicator, and the left side BCW/BSD module.
C120B15 – Right LED Circuit Short To B or Open.
This code refers to an electrical connection issue between the right side mirror BCW/BSD LED light indicator, and the right side BCW/BSD module.
1. Using a multimeter, check continuity (<1ohm) from BCW/BSD module to BCW/BSD light indicator.
2. Check the mirror assembly and/or wire harness for open, shorted, frayed wires or poor connector fastening.
3. Check the connector pins for tension, corrosion, or damage. Confirm the connector is fully seated (disconnect and reconnect the connector).
4. If steps 1-3 are confirmed normal, then proceed with replacing the BCW/BSD module(s) according to the DTC code.
Diagnose and fix C160A88
C160A88 – BSD Local CAN bus off
This code refers to an electrical connection issue between the left side and the right side BCW/BSD modules.
1. Using a multimeter, check continuity (<1ohm) of the High and Low CAN line between the two BCW/BSD modules.
2. Check the wire harness for open, shorted, frayed wires or poor connector fastening.
3. Check connector pins for tension, corrosion, or damage. Confirm the connector is fully seated (disconnect and reconnect the connector).
4. If steps 1-3 are confirmed normal, then proceed with replacing the BCW/BSD module(s).
Diagnose and fix C164C/D87
C164C/D87 – BSD Local CAN bus off
This code refers to an electrical connection issue between the left side and the right side BCW/BSD modules.
1. Using a multimeter, check for continuity (<1ohm) of the High and Low CAN line between the two BCW/BSD modules.
2. Check wire harness for open, shorted, frayed wires or poor connector fastening.
3. Check connector pins for tension, corrosion, or damage. Confirm the connector is fully seated (disconnect and reconnect the connector).
4. If steps 1-3 are confirmed normal, then proceed with replacing the BCW/BSD module(s).
Additional tests for C164C/D87
C164C/D87 – BSD Local CAN bus off
This code refers to an electrical connection issue between the left side and the right side BCW/BSD modules.
1. If abnormal voltage found at E-CAN High/Low, check E-CAN circuit.
2. Check wire harness for
open, shorted, frayed wires or poor connector fastening.
3. Check connector pins for tension, corrosion, or damage. Confirm the connector is fully seated (disconnect and reconnect the connector).
4. If steps 1-3 are confirmed normal, then proceed with replacing the BCW/BSD module(s).
