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Hyundai blind spot detection not working

Hyundai blind spot detection not working

Hyundai service bulletin #22-BE-003H fix for blind spot detection not working

Hyundai has issued a service bulletin #22-BE-003H to address multiple issues that result in a blind spot detection not working condition

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

How to diagnose and fix C120D15 or C120B15 trouble codes

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.

C120D15

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).

hyundai blind spot not working

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).

hyundai blind spot not working 2
hyundai blind spot

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).
hyundai blind spot detection not working

Posted on by Rick Muscoplat

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