L-TT-0255-19

Tech Tip
L-TT-0255-19
January 16, 2019
Subject
Market
USA
Injection Active Test Remedy
Service Category
Section
Engine/Hybrid System
Engine Control
Applicability
All current vehicles with FKS engine
APPLICABLE VEHICLES
2018-2020
2018-2020
2017-2020
2016-2017
2016-2017
2019-2020
RC300
GS300
GS350
GS200T
IS200T
UX200
2018-2020
2018-2020
2018-2020
2016-2020
2019-2020
2016-2017
LS500
NX300
IS300
RX350
ES350
RC200T
CONDITION
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.
Use the recommended procedure below to avoid this concern while testing injection mode of FKS
equipped vehicles.
NOTE: If the active test is used multiple times without using this procedure to raise engine RPM, it
may be necessary to reset learning values for fuel trim and Air to Fuel ratio before returning vehicle to
customer.
RECOMMENDATIONS


Using Techstream navigate to Active Test  Control the Injection Mode.
Verify the Execute conditions are met to perform the active test.
NOTE: Vehicle must be stopped and the engine idling, Coolant Temperature must be above
176F (80C).
Expires on
Ver. 2.9 01/01/2018 L
01/16/2020
© 2018, Lexus, a Division of Toyota Motor Sales, USA
Page 1 of 4
Tech Tip L-TT-0255-19
January 16, 2019
Subject
Market
Injection Active Test Remedy
USA
Applicability
All current vehicles with FKS engine
RECOMMENDATIONS

After selecting the criteria desired for monitoring, the following screen will appear:
NOTE: 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.
o Injection Mode
o STFT (for all banks)
o LTFT (for all banks)
o Misfire count for all cylinders and individual cylinders
o Misfire margin
o Knock correct learn value
Expires on
Ver. 2.9 01/01/2018 L
01/16/2020
© 2018, Lexus, a Division of Toyota Motor Sales, USA
Page 2 of 4
Tech Tip L-TT-0255-19
January 16, 2019
Subject
Market
Injection Active Test Remedy
USA
Applicability
All current vehicles with FKS engine
RECOMMENDATIONS

Utilize the active test control window to command direct
injectors or port injectors to “Start” and “Stop.”
Key Point:
When switching the direct injection active test, to port injection active test, raise engine RPM
to 2,000 RPM prior to pressing “Start” and
for 30 seconds after as shown. Perform the
same when switching from port injection
active test to direct injection
Expires on
Ver. 2.9 01/01/2018 L
01/16/2020
© 2018, Lexus, a Division of Toyota Motor Sales, USA
Page 3 of 4
Tech Tip L-TT-0255-19
January 16, 2019
Subject
Market
Injection Active Test Remedy
USA
Applicability
All current vehicles with FKS engine
RECOMMENDATIONS

Utilizing the data list confirm the switch occurs when commanded with the Injection Mode
parameter
LINK REFERENCES
This Tech Tip does not contain any link references
Expires on
Ver. 2.9 01/01/2018 L
01/16/2020
© 2018, Lexus, a Division of Toyota Motor Sales, USA
Page 4 of 4