DTC U0155[00] Lost Communication With Instrument Panel Cluster (Auto A/C)

1. Auto A/C control system check

Refer to "57.HVAC Control 7A.Troubleshooting(Auto A/C) diagnostic system check-auto A/C controls".

2. Current DTC check

1) Connect the scan tool.

2) Turn ON the ignition switch.

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

Yes (Models with radar sensors)

=>Go to Body CAN communication circuit inspection.

Yes (Except models with radar sensors)

=>Go to CAN communication circuit inspection.

No

Go to Intermittent conditions of auto A/C control system.

Refer to "208.HVAC 21D.Symptom intermittent conditions of auto A/C control system".

3. Body CAN communication circuit inspection

1) Perform Body CAN communication circuit inspection.

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

Procedure completion

=>Go to Current DTC follow-up check.

4. CAN communication circuit inspection

1) Perform Scan tool does not communicate with CAN device.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) scan tool does not communicate with CAN device (models without radar sensor and stereo camera)".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) scan tool does not communicate with CAN device (models without radar sensor and stereo camera)".

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) scan tool does not communicate with CAN device (models without radar sensor and stereo camera)".

Procedure completion

=>Go to Current DTC follow-up check.

5. Current DTC follow-up check

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool.

Yes

=>Go to Control panel replacement.

No

=>Go to Repair verification.

6. Control panel replacement

Refer to "7.HVAC 7B.Heater Ventilator Airconditioner control panel and control lever removal".

Refer to "7.HVAC 7B.Heater Ventilator Airconditioner control panel and control lever installation".

Refer to "7.HVAC 7B.Heater Ventilator Airconditioner control panel and control lever setting".

Procedure completion

=>Go to Repair verification.

7. Repair verification

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool.