DTC U01B0[00] Lost Communication With Battery Sensor (Information Module)

1. Information module system check

Refer to "64.Body Control 10I.Troubleshooting(Information Module) diagnostic system check - information module".

2. Programming verification

1) Connect the scan tool.

2) Display the Vehicle Configuration All Data Setting / Change on the scan tool and verify that the equipped ECU information is programmed correctly.

3) If it is not programmed correctly, reprogram the correct value.

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

Procedure completion

=>Go to Current DTC check.

3. Current DTC check

1) Turn OFF the ignition switch.

2) Turn ON the ignition switch and wait for 5 seconds or more.

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

Yes

=>Go to Battery sensor communication verification.

No

Go to Intermittent conditions of information module.

Refer to "223.Body Control 36D.Symptom(Information Module) Intermittent Conditions of Information Module".

4. Battery sensor communication verification

1) Verify that communication can be established with the battery sensor using the scan tool. Can communication with the battery sensor established?

Yes

=>Go to Battery sensor DTC check.

No (Models with radar sensors/stereo cameras)

Go to Lost communication with the battery sensor.

Refer to "51.Engine Control 1A.Troubleshooting(IBS (4JJ3 with DPD)) lost communication with the battery sensor (models with radar sensor/ stereo camera)".

Refer to "51.Engine Control 1A.Troubleshooting(IBS (RZ4E-TC)) lost communication with the battery sensor (models with radar sensor/ stereo camera)".

No (Models without radar sensors and stereo cameras)

Go to Lost communication with the battery sensor.

Refer to "51.Engine Control 1A.Troubleshooting(IBS (4JJ3 with DPD)) lost communication with the battery sensor (models without radar sensor and stereo camera)".

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

5. Battery sensor DTC check

1) Observe the battery sensor DTC information with a scan tool. Is a battery sensor DTC set?

Yes

Go to the applicable DTC diagnosis.

No

=>Go to CAN communication circuit inspection.

6. CAN communication circuit inspection

1) Inspect the CAN Low circuit and CAN High circuit between the information module (pins 12 and 24 of C105) and the battery sensor (pins 2 and 3 of C49) for the following. Is the result normal?

Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Controller Area Network (Except Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to Battery sensor harness connector inspection.

No

Repair the circuit as necessary.

=>Go to Repair verification.

7. Battery sensor harness connector inspection

1) Inspect for poor connections at the battery sensor harness connector (pins 2 and 3 of C49). Is the connection status normal?

Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Controller Area Network (Except Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to Information module harness connector inspection.

No

Repair the connections as necessary.

=>Go to Repair verification.

8. Information module harness connector inspection

1) Inspect for poor connections at the information module harness connector (pins 12 and 24 of C105). Is the connection status normal?

Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "LHD Controller Area Network (Except Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

Replace the battery sensor.

Refer to "1.Engine 1J.Electrical(4JJ3 with DPD) battery sensor removal".

Refer to "1.Engine 1J.Electrical(4JJ3 with DPD) battery sensor installation".

Refer to "1.Engine 1J.Electrical(RZ4E-TC) battery sensor removal".

Refer to "1.Engine 1J.Electrical(RZ4E-TC) battery sensor installation".

=>Go to Current DTC follow-up check.

No

Repair the connections as necessary.

=>Go to Repair verification.

9. Current DTC follow-up check

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

2) Turn ON the ignition switch and wait for 5 seconds or more.

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

Yes

=>Go to Information module replacement.

No

=>Go to Repair verification.

10. Information module replacement

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

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

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

Procedure completion

=>Go to Repair verification.

11. Repair verification

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

2) Turn ON the ignition switch and wait for 5 seconds or more.

3) Observe the DTC information with a scan tool.