DTC U1B01[66] Unauthorized Signal Reception with ECM (Wireless Access Module (Mid-version/Lo-version [Except Passive Entry and Start System]))

1. Wireless access module system check

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

2. Prioritized DTC check

1) Turn ON the ignition switch.

2) Observe the DTC information with a scan tool. Is DTC B1035[51], B1089[41], B1089[44], or B1089[45] set at the same time?

3) Observe the DTC information for the engine control system with a scan tool. Is a DTC set?

Yes

Go to the applicable DTC diagnosis.

Refer to "71.Security and Locks Control 10S.Troubleshooting(Wireless Access Module (Mid-version/Lo-version [Except Passive Entry and Start System])) DTC B1035[51] Immobilizer Security Code Not Programmed".

Refer to "71.Security and Locks Control 10S.Troubleshooting(Wireless Access Module (Mid-version/Lo-version [Except Passive Entry and Start System])) DTC B1089[41] EEPROM Checksum Failure".

Refer to "71.Security and Locks Control 10S.Troubleshooting(Wireless Access Module (Mid-version/Lo-version [Except Passive Entry and Start System])) DTC B1089[44] ECU Failure (Data Memory Failure)".

Refer to "71.Security and Locks Control 10S.Troubleshooting(Wireless Access Module (Mid-version/Lo-version [Except Passive Entry and Start System])) DTC B1089[45] ECU Failure (Program Memory Failure)".

No

=>Go to Wireless access module programming and ECM programming.

3. Wireless access module programming and ECM programming

1) Perform programming of the security information into the wireless access module.

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control wireless access module setting (without passive entry and start system)".

2) Perform programming of the security information into the ECM.

Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 with DPD) ECM setting".

Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 without DPD) ECM setting".

Refer to "1.Engine 1Z.Engine Electrical Control(RZ4E-TC) ECM setting".

Procedure completion

=>Go to Current DTC check.

4. Current DTC check

1) Turn OFF the ignition switch.

2) Turn ON the ignition switch.

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

Yes

=>Go to ECM replacement.

No

=>Go to Repair verification.

5. ECM replacement

Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 with DPD) ECM removal".

Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 with DPD) ECM installation".

Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 with DPD) ECM setting".

Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 without DPD) ECM removal".

Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 without DPD) ECM installation".

Refer to "1.Engine 1Z.Engine Electrical Control(4JJ3 without DPD) ECM setting".

Refer to "1.Engine 1Z.Engine Electrical Control(RZ4E-TC) ECM removal".

Refer to "1.Engine 1Z.Engine Electrical Control(RZ4E-TC) ECM installation".

Refer to "1.Engine 1Z.Engine Electrical Control(RZ4E-TC) ECM setting".

Procedure completion

=>Go to Current DTC follow-up check.

6. Current DTC follow-up check

1) Turn OFF the ignition switch.

2) Turn ON the ignition switch.

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

Yes

=>Go to Wireless access module replacement.

No

=>Go to Repair verification.

7. 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 (without passive entry and start system)".

Procedure completion

=>Go to Repair verification.

8. Repair verification

1) Turn OFF the ignition switch.

2) Turn ON the ignition switch.

3) Observe the DTC information with a scan tool.