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

READ VALUE USING TECHSTREAM (INTAKE AIR)

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Enter the following menus: Powertrain / Engine / Data List / Intake Air.

Read the value displayed on the Techstream.

Standard

Same as actual intake air temperature.

Result

Temperature Displayed	Proceed to
-40°C (-40°F)	A
Higher than 128°C (262°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 higher than 128°C (262°F).

B → See step 4

C → See step 6

A: Go to next step

READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS)
1. Disconnect the mass air flow meter connector.
  
  Fig 1: Identifying Mass Air Flow Meter Circuit & Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect terminals THA and E2 of the mass air flow meter wire harness 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
  
  Higher than 128°C (262°F)
8. Reconnect the mass air flow meter connector.
NG → See step 3

OK → See step 7
READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN ECM)
1. Disconnect the mass air flow meter connector.
  
  Fig 2: Identifying Mass Air Flow Meter Circuit & ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect terminals THA and E2 of the ECM connector.
  HINT:
  
  Before checking, do visual and contact pressure checks on the ECM 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
  
  Higher than 128°C (262°F)
8. Reconnect the mass air flow meter connector.
NG → See step 8

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER - ECM)
READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS)

Fig 3: Identifying Mass Airflow Meter Circuit
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the mass air flow meter connector.
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 mass air flow meter connector.
NG → See step 5

OK → See step 9
READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN ECM)
1. Disconnect the mass air flow meter connector.
  
  Fig 4: Identifying Mass Air Flow Meter Circuit & ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the ECM 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
  
  -40°C (-40°F)
8. Reconnect the mass air flow meter connector.
NG → See step 10

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER - ECM)
CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS
REPLACE MASS AIR FLOW METER. Refer to REMOVAL
REPLACE ECM. Refer to REMOVAL
REPLACE MASS AIR FLOW METER. Refer to REMOVAL
REPLACE ECM. Refer to REMOVAL