DTC P0112: Intake Air Temperature Circuit Low Input; DTC P0113: Intake Air Temperature Circuit High Input: Procedure

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / 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
   Higher than 128°C (262°F)	B
   Same as actual IAT	C

   HINT: 

   • If there is an open circuit, Techstream indicates -40°C (-40°F).
   • If there is a short circuit, Techstream indicates higher than 128°C (262°F).

B → See step   4 

C → See step   6 

A: Go to next step 

1. Confirm good connection of the mass air flow meter.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the E29 Mass Air Flow (MAF) meter connector.
3. Connect terminals THA and E3 of the MAF meter wire harness side connector.
4. Connect Techstream to the DLC3.
5. Turn the engine switch on (IG).
6. Turn the Techstream on.
7. Enter the following menus: Powertrain / Engine / Data List / All Data / Intake Air.
8. Read the value displayed on the Techstream.

   Standard

   Higher than 128°C (262°F)

9. Reconnect the MAF meter connector.

OK → See step   7 

NG: Go to next step 

1. Confirm good connection of the ECM.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the E29 MAF meter connector.
3. Connect terminals THA and E3 of the E5 ECM connector.

   HINT: 

   Before checking, do visual and contact pressure checks on the ECM connector.

4. Connect Techstream to the DLC3.
5. Turn the engine switch on (IG).
6. Turn the Techstream on.
7. Enter the following menus: Powertrain / Engine / Data List / All Data / Intake Air.
8. Read the value displayed on the Techstream.

   Standard

   Higher than 128°C (262°F)

9. Reconnect the MAF meter connector.

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR 

NG → See step   8 

1. Disconnect the E29 MAF meter connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard

   -40°C (-40°F)

7. Reconnect the MAF meter connector.

OK → See step   9 

NG: Go to next step 

1. Disconnect the E5 ECM connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard

   -40°C (-40°F)

7. Reconnect the ECM connector.

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR 

NG → See step   10