This bulletin applies to 2017-2010 Toyota Highlander, 2019-2020 Avalon, 2020 RAV4 and 2019-2020 Corolla Hatchback models. The current engine active test “Control the Injection Mode” is not operating as desired when controlling the direct injectors manually on 2GR-FKS engines.
When direct injection is started and then stopped using the active test, current ECU logic does not turn off the direct injectors and can cause DTCs P017200, P017500 and P0160300.
To avoid this condition, technicians should raise engine rpm when changing back and forth between the Direct Injection and Port Injection active tests.
If the active test is used multiple times without using the procedure to raise engine rpm, it may be necessary to reset learning values for fuel trim and air to fuel ratio before returning the vehicle to the customer.
Using Techstream, navigate to Active Test > Control the injection mode. Verify that the Execute conditions are met to perform the Active Test. The vehicle must be stopped with the engine idling. Coolant temperature must be above 176 degrees Fahrenheit.