TSB's

Toyota Injection Test

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.

After selecting the criteria desired for monitoring, this screen will appear. When selecting a Data List for the injection mode active test, be sure to have the following parameters in the primary data list to aid in diagnosis. You may have to add the following to the primary data list on Techstream version 13.30.018:
  • Injection mode
  • STFT (for all banks)
  • LTFT (for all banks)
  • Misfire count for all cylinders and individual cylinders
  • Misfire margin
  • Knock correct learn value
<p>After selecting the criteria desired for monitoring, this screen will appear. When selecting a Data List for the injection mode active test, be sure to have the following parameters in the primary data list to aid in diagnosis. You may have to add the following to the primary data list on Techstream version 13.30.018:&nbsp;</p><ul><li>Injection mode</li><li>STFT (for all banks)</li><li>LTFT (for all banks)</li><li>Misfire count for all cylinders and individual cylinders</li><li>Misfire margin</li><li>Knock correct learn value</li></ul>

Utilize the active test control window to command direct injectors or port injectors to “Start” and “Stop.”
<p>Utilize the active test control window to command direct injectors or port injectors to &ldquo;Start&rdquo; and &ldquo;Stop.&rdquo;&nbsp;</p>

When switching the direct injection active test to port injection active test, raise engine rpmM to 2,000 rpm prior to pressing “Start” and for 30 seconds after. Perform the same when switching from port to direct injection test.
<p>When switching the direct injection active test to port injection active test, raise engine rpmM to 2,000 rpm prior to pressing &ldquo;Start&rdquo; and for 30 seconds after. Perform the same when switching from port to direct injection test.&nbsp;</p>

Utilizing the data list to confirm that the switch occurs when commanded with the injection mode parameter.
<p>Utilizing the data list to confirm that the switch occurs when commanded with the injection mode parameter.</p>

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