DTC P0110: Intake Air Temperature Circuit; DTC P0112: Intake Air Temperature Circuit Low Input; DTC P0113: Intake Air Temperature Circuit High Input: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to the ON position and turn the Techstream on.
3. Select the following menu items: Powertrain / Engine and ECT / Trouble Codes.
4. Read the DTCs.

   Result

   Display (DTC Output)	Proceed to
   P0110	A
   P0112	B
   P0113	C

C → See step   4 

B → See step   5 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to the ON position.
3. Turn the Techstream on.
4. On the Techstream, select the following menu items: Powertrain / Engine and ECT / Data List / All Data / Intake Air.
5. Read the value displayed on the Techstream.

   Standard

   Same as the actual Intake Air Temperature (IAT).

   Result

   Temperature Displayed	Proceed to
   -40°C (-40°F)	A
   140°C (284°F)	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).

C → See step   7 

B → See step   5 

A: Go to next step 

1. Disconnect the M1 MAF meter connector.
   Fig 1: MAF Meter - Circuit Diagram & Connector End View

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect terminal THA of the MAF meter wire harness side connector.
3. Connect the Techstream to the DLC3.
4. Turn the ignition switch to the ON position and turn the Techstream on.
5. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Intake Air.
6. Read the value.

   Standard temperature

   140°C (284°F)

7. Reconnect the MAF meter connector.

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

NG: Go to next step 

1. Disconnect the M1 MAF meter connector.
   Fig 2: MAF Meter Connector - Circuit Diagram

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect terminals THA and E2 of the E7 and E8 ECM connectors.
   Fig 3: Identifying THA And E2 Terminals Of E8 And E7 ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT: 

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

3. Connect the Techstream to the DLC3.
4. Turn the ignition switch to the ON position.
5. Turn the Techstream on.
6. On the Techstream, select the following menu items: Powertrain / Engine and ECT / Data List / All Data / Intake Air.
7. Read the value displayed on the Techstream.

   Standard temperature

   140°C (284°F)

8. Reconnect the MAF meter connector.

NG → CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the M1 MAF meter connector.
2. Connect the Techstream to the DLC3.
   Fig 4: MAF Meter - Circuit Diagram

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Turn the ignition switch to the ON position.
4. Turn the Techstream on.
5. On the Techstream, select the following menu items: Powertrain / Engine and ECT / Data List / All Data / Intake Air.
6. Read the value displayed on the Techstream.

   Standard temperature

   -40°C (-40°F)

7. Reconnect the MAF meter connector.

OK → See step   8 

NG: Go to next step 

1. Disconnect the E7 and E8 ECM connectors.
   Fig 5: Checking For Short In ECM

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the Techstream to the DLC3.
   Fig 6: Identifying E8 And E7 ECM Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Turn the ignition switch to the ON position.
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Intake Air.
6. Read the value displayed on the Techstream.

   Standard temperature

   -40°C (-40°F)

7. Reconnect the ECM connectors.

NG → See step   9 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR