DTC U1A10[86] Lost Communication With Radar Sensor Left (BCM)

1. Body control system check

Refer to "64.Body Control 10I.Troubleshooting(BCM) diagnostic system check-body controls".

2. BCM DTC check

1) Observe whether a DTC is set in the BCM on the scan tool. Is a DTC set in the BCM?

Yes

=>Go to Radar sensor (Left) communication verification.

No

Go to Intermittent conditions of body control system.

Refer to "223.Body Control 36D.Symptom(BCM) intermittent conditions of body control system".

3. Radar sensor (Left) communication verification

1) Use the scan tool to communicate with the radar sensor (left) to display the data. Can communication with the radar sensor (left) be established?

Yes

=>Go to Radar sensor (left) DTC check.

No

Refer to "75.Driver Assistance System 10W.Troubleshooting(Radar Sensor (Left)) Lost communication with radar sensor".

4. Radar sensor (left) DTC check

1) Observe whether a DTC is set in the radar sensor (left) on the scan tool. Is a DTC set in the radar sensor (left)?

Yes

Go to the applicable DTC diagnosis.

No

=>Go to Chassis CAN communication circuit and Body CAN communication circuit inspection.

5. Chassis CAN communication circuit and Body CAN communication circuit inspection

1) Perform Chassis CAN communication circuit inspection and Body CAN communication circuit inspection.

Refer to "64.Body Control 10I.Troubleshooting(Central GateWay) chassis CAN communication circuit inspection".

Refer to "64.Body Control 10I.Troubleshooting(Central GateWay) body CAN communication circuit inspection".

Procedure completion

=>Go to Current DTC check.

6. Current DTC check

1) Connect the scan tool.

2) Turn OFF the ignition switch.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool. Is a DTC set?

Yes

=>Go to BCM replacement.

No

=>Go to Repair verification.

7. BCM replacement

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control BCM removal".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control BCM installation".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control BCM setting".

Procedure completion

=>Go to Repair verification.

8. Repair verification

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch for 30 seconds or more.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool.