DTC P0112: Intake Air Temperature Circuit Low Input; DTC P0113: Intake Air Temperature Circuit High Input [06/2016 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Intake Air.
5. Read the value displayed on the Techstream.

   OK

   Same as actual intake air temperature.

   RESULT
   
   

   Result	Proceed to
   -40°C (-40°F)	A
   120°C (248°F)	B
   Same as actual intake air temperature	C

   HINT: 

   • If there is an open circuit, the Techstream indicates -40°C (-40°F).
   • If there is a short circuit, the Techstream indicates 120°C (248°F).

Result: 

B 

See step  4

Result: 

C 

CHECK FOR INTERMITTENT PROBLEMS 

(Refer to CHECK FOR INTERMITTENT PROBLEMS [06/2016 - ] )

Result: 

A 

See step  2

1. Disconnect the mass air flow meter connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Connect terminals 1 and 2 of the mass air flow meter connector on the wire harness side.
3. Connect the Techstream to the DLC3.
4. Turn the ignition switch to ON.
5. Turn the Techstream on.
6. Enter the following menus: Powertrain / Engine / Data List / Intake Air.
7. Read the value displayed on the Techstream.

   Standard value

   120°C (248°F)

   TEXT IN ILLUSTRATION
   
   

   *1	Mass Air Flow Meter
   *2	ECM
   *a	Front view of wire harness connector (to Mass Air Flow Meter)

Result: 

OK 

REPLACE MASS AIR FLOW METER 

(Refer to REMOVAL [06/2016 - ] )

Result: 

NG 

See step  3

1. Disconnect the mass air flow meter connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   A33-12 (THA) - C16-1 (THA)	Always	Below 1 Ω
   A36-29 (E1) - C16-2 (E2)	Always	Below 1 Ω

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [06/2016 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the mass air flow meter connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Connect the Techstream to the DLC3.
3. Turn the ignition switch to ON.
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Engine / Data List / Intake Air.
6. Read the value displayed on the Techstream.

   Standard value

   -40°C (-40°F)

   TEXT IN ILLUSTRATION
   
   

   *1	Mass Air Flow Meter
   *2	ECM

Result: 

OK 

REPLACE MASS AIR FLOW METER 

(Refer to REMOVAL [06/2016 - ] )

Result: 

NG 

See step  5

1. Disconnect the mass air flow meter connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   A33-12 (THA) or C16-1(THA) - Body ground	Always	10 kΩ or higher
   A36-29 (E1) or C16-2 (E2) - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [06/2016 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR