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 engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / 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)	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).

B → See step   4 

C → CHECK FOR INTERMITTENT PROBLEMS 

A: Go to next step 

1. Disconnect the E83 MAF meter connector.
   Fig 1: Connecting Terminals THA And E2 Of MAF Meter Wire Harness Side Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect terminals THA and E2 of the MAF meter wire harness side connector.
3. Connect the Techstream to the DLC3.
4. Turn the engine switch on (IG).
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

   140°C (284°F)

8. 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 E83 MAF meter connector.
2. Disconnect the E6 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Specified Condition
   E83-1 (THA) - E6-18 (THA)	Below 1 Ω
   E83-2 (E2) - E6-19 (ETHA)	Below 1 Ω

4. Reconnect the MAF connector.
5. Reconnect the ECM connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

1. Disconnect the E83 MAF meter connector.
   Fig 2: Identifying E83 MAF Meter Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the 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 / Intake Air.
6. Read the value displayed on the Techstream.

   Standard

   -40°C (-40°F)

7. Reconnect the MAF meter connector.

OK → REPLACE MASS AIR FLOW METER 

NG: Go to next step 

1. Disconnect the E83 MAF meter connector.
2. Disconnect the E6 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for short)

   Tester Connection	Specified Condition
   E83-1 (THA) or E6-18 (THA) - Body ground	10 kΩ or higher

4. Reconnect the MAF connector.
5. Reconnect the ECM connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE ECM