DTC P0112: Intake Air Temperature Circuit Low Input; DTC P0113: Intake Air Temperature Circuit High Input [08/2017 - 08/2018]: 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 / All Data / Intake Air.
5. Read the value displayed on the Techstream.

   Standard

   Same as actual Intake Air Temperature (IAT).

   RESULT
   
   

   Temperature Displayed	Proceed to
   -40°C (-40°F)	A
   140°C (284°F) or higher	B
   Same as actual IAT	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) or higher.

Result: 

B 

See step  4

Result: 

C 

CHECK FOR INTERMITTENT PROBLEMS 

(Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2015 - 08/2018] )

Result: 

A 

See step  2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the D3 MAF meter connector.
2. Connect terminals 4 (THA) and 5 (E2) of the MAF meter wire harness side connector.
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 / All Data / Intake Air.
7. Read the value displayed on the Techstream.

   Standard value

   140°C (284°F) or higher

   HINT: 

   Perform "Inspection After Repair" after replacing the mass air flow meter (Refer to INITIALIZATION [08/2017 - 08/2018] ).

Result: 

OK 

CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE MASS AIR FLOW METER 

(Refer to REMOVAL [08/2015 - 08/2018] )

Result: 

NG 

See step  3

1. Disconnect the D3 MAF meter connector.
2. Disconnect the D56 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D3-4 (THA) - D56-71 (THA)	Always	Below 1 Ω
   D3-5 (E2) - D56-74 (EAIP)	Always	Below 1 Ω

Result: 

OK 

CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM 

(Refer to REMOVAL [08/2015 - 08/2018] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the D3 MAF meter connector.
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 / All Data / 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 [08/2017 - 08/2018] ).

Result: 

OK 

REPLACE MASS AIR FLOW METER 

(Refer to REMOVAL [08/2015 - 08/2018] )

Result: 

NG 

See step  5

1. Disconnect the D3 MAF meter connector.
2. Disconnect the D56 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D3-4 (THA) or D56-71 (THA) - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [08/2015 - 08/2018] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR