On-Vehicle Inspection [09/2014 - 11/2017]: Procedure

WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

Refer to INITIALIZATION [09/2014 - 11/2017]

Read the value using the Techstream (MAF).

NOTE:

Perform the inspection with the vehicle indoors and on a level surface.
Perform the inspection of the mass air flow meter sub-assembly while it is installed to the air cleaner cap sub-assembly (installed to the vehicle).
During the test, do not use an exhaust air duct on the exhaust pipe.

Connect the Techstream to the DLC3.
Turn the engine switch on (IG) (do not start the engine).
Turn the Techstream on.

Enter the following menus: Powertrain / Engine / Data List / MAF.

Powertrain > Engine > Data List

Tester Display
MAF

Wait for 30 seconds, and read the value on the Techstream.

Standard Condition

Tester Display	Condition	Specified Condition
MAF	Engine not running 30 seconds after engine switch turned on (IG)	0.54 gm/sec or less

If the result is not as specified, clean the mass air flow meter sub-assembly.

Refer to INSPECTION [09/2014 - 11/2017]

If the result is within the specified range, check the intake air temperature sensor (thermistor) resistance.

Refer to INSPECTION [09/2014 - 11/2017]

PERFORM INITIALIZATION
1. Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.
  Refer to INITIALIZATION [09/2014 - 11/2017]