DTC P0112: Intake Air Temperature Circuit Low Input; DTC P0113: Intake Air Temperature Circuit High Input [10/2017 - 12/2021]: 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 and ECT / Data List / All Data / Intake Air.

   Powertrain > Engine and ECT > Data List 

   Tester Display
   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
   140°C (284°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 140°C (284°F).

Result: 

B 

See step  4

Result: 

C 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [10/2017 - 12/2021] 

Result: 

A 

See step  2

1. Disconnect the mass air flow meter.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Connect terminals 4 (THA) and 2 (E2G) 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 and ECT / Data List / All Data / Intake Air.

   Powertrain > Engine and ECT > Data List 

   Tester Display
   Intake Air

7. Read the value displayed on the Techstream.

   Standard value

   140°C (284°F)

   HINT: 

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

   Refer to INITIALIZATION [10/2017 - 12/2021]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MASS AIR FLOW METER. Refer to  REMOVAL [10/2017 - 12/2021] 

Result: 

NG 

See step  3

1. Disconnect the C5 mass air flow meter connector.
2. Disconnect the C63 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C5-4 (THA) - C63-138 (THA)	Always	Below 1 Ω
   C5-2 (E2G) - C63-104 (E2G)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the mass air flow meter connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Mass Air Flow Meter
   *2	ECM

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 and ECT / Data List / All Data / Intake Air.

   Powertrain > Engine and ECT > Data List 

   Tester Display
   Intake Air

6. Read the value displayed on the Techstream.

   Standard value

   -40°C (-40°F)

   HINT: 

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

   Refer to INITIALIZATION [10/2017 - 12/2021]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MASS AIR FLOW METER. Refer to  REMOVAL [10/2017 - 12/2021] 

Result: 

NG 

See step  5

1. Disconnect the C5 mass air flow meter.
2. Disconnect the C63 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C5-4 (THA) or C63-138 (THA) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [10/2017 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR