DTC P0602 Control Module Programming Error (4JJ3 with DPD)

1. Engine control system check

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) Diagnostic system check-engine controls".

2. Current DTC check

1) Verify that all the tool connections are securely connected.

2) Verify that the programming device operates properly.

3) Connect the scan tool.

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

5) Turn ON the ignition switch.

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

Yes

=>Go to Injector ID Code verification.

No

=>Go to Repair verification.

3. Injector ID Code verification

1) Confirm that the correct Injector ID Code is input into the ECM with a scan tool.

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

2) If the injector ID code is correctly input, clear the DTC with a scan tool.

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

4) Turn ON the ignition switch.

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

Yes

=>Go to ECM replacement.

No

=>Go to Repair verification.

4. ECM replacement

Note

  • Perform programming after replacing the ECM.

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".

Procedure completion

=>Go to Repair verification.

5. Repair verification

1) Clear the DTC with a 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.