DTC P161B Immobilizer Wrong Response (4JJ3 without DPD)

1. Engine control system check

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) Diagnostic system check-engine controls".

2. Prioritized DTC check

1) Connect the scan tool.

2) Turn OFF the ignition switch for 1 minute or more.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool. Is DTC P0633, U0001, or U0167 set at the same time?

Yes

Go to the applicable DTC diagnosis.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC P0633 Immobilizer Key Not Programmed - ECM/PCM".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC U0001 High Speed CAN Communication Bus".

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC U0167 Lost Communication With Vehicle Immobilizer Control Module".

No

=>Go to Immobilizer-related DTC check.

3. Immobilizer-related DTC check

1) Observe the immobilizer-related DTC with a scan tool. Is the immobilizer-related DTC set?

Yes

Go to the applicable DTC diagnosis.

No

=>Go to Immobilizer security information check.

4. Immobilizer security information check

1) Program the immobilizer security information into the ECM. Is it programmed?

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

Yes

=>Go to Repair verification.

No

=>Go to ECM replacement.

5. ECM replacement

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".

Procedure completion

=>Go to Repair verification.

6. Repair verification

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch for 1 minute or more.

3) Start the engine.

4) Operate the vehicle under the conditions for running the DTC.

5) Observe the DTC information with a scan tool.