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

READ VALUE USING TECHSTREAM (INTAKE AIR TEMPERATURE)

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
140°C (284°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 140°C (284°F).

C → See step 6

B → See step 4

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
  
  140°C (284°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 And ECM Circuit With ECM Connectors Terminals
  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
  
  140°C (284°F)
8. Reconnect the mass air flow meter connector.
NG → See step 8

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR
READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS)

Fig 3: Identifying Mass Airflow Meter And ECM 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 And ECM Circuit With ECM Connectors Terminals
  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
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