DTC U0140[00] Lost Communication With BCM (Wireless Access Module (Hi-version [Passive Entry and Start System]))

1. Wireless access module system check

Refer to "71.Security and Locks Control 10S.Troubleshooting(Wireless Access Module (Hi-version [Passive Entry and Start System])) Diagnostic system check-Wireless Access Module (Hi-version[Passive Entry and Start System])".

2. Wireless access module DTC check

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

Yes

=>Go to BCM communication verification.

No

Go to Intermittent conditions of wireless access module.

Refer to "229.Security and Locks Control 42D.Symptom intermittent conditions of wireless access module".

3. BCM communication verification

1) Use the scan tool to communicate with the BCM to display the data. Can communication with the BCM be established?

Yes

=>Go to BCM DTC check.

No (Models with radar sensors/stereo cameras)

Refer to "64.Body Control 10I.Troubleshooting(BCM) lost communication with the BCM (models with radar sensor/ stereo camera)".

No (Models without radar sensors and stereo cameras)

Refer to "64.Body Control 10I.Troubleshooting(BCM) lost communication with the BCM (models without radar sensor and stereo camera)".

4. 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 the applicable DTC diagnosis.

No (Models with radar sensors/stereo cameras)

=>Go to Body CAN communication circuit inspection.

No (Models without radar sensors and stereo cameras)

=>Go to CAN communication system inspection.

5. 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 check.

6. CAN communication system inspection

1) Inspect the CAN communication system.

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) lost communication with the ECM (models without radar sensor and stereo camera)".

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) lost communication with the ECM (models without radar sensor and stereo camera)".

Procedure completion

=>Go to Current DTC check.

7. Current DTC check

1) Turn OFF the ignition switch.

2) Close all the doors.

3) Lock and unlock the doors 5 times or more with the passive entry and start system function.

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

Yes

=>Go to Wireless access module replacement.

No

=>Go to Repair verification.

8. Wireless access module replacement

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control wireless access module removal".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control wireless access module installation".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control wireless access module setting (with passive entry and start system)".

Procedure completion

=>Go to Repair verification.

9. Repair verification

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch.

3) Close all the doors.

4) Lock and unlock the doors 5 times or more with the passive entry and start system function.

5) Observe the DTC information with a scan tool.