DTC P0110: Intake Air Temperature Circuit; 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 ignition switch to ON and turn the Techstream on.
Enter the following menus: Powertrain / Engine / Data List / Intake Air.

Read the values.

Same value as the actual IAT

Result

Result	Proceed to
-40°C (-40°F)	A
140°C (284°F) or more	B
OK (same as present 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) or more.

C → See step 4

B → See step 7

A: Go to next step

READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS)

Fig 1: Identifying THA And E2 Of MAF Meter Wire Harness Side Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the M1 MAF meter connector.
2. Connect terminal THA and E2 of the MAF meter's wire harness side connector.
3. Connect the Techstream to the DLC3.
4. Turn the ignition switch to ON and turn the Techstream on.
5. Enter the following menus: Powertrain / Engine / Data List / Intake Air.
6. Read the value.
  Standard
  
  Temperature value is 140°C (284°F) or more
NG → See step 3

OK → See step 5
READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN ECM)

Fig 2: Identifying THA Of E4 ECM And E2 Of E2 ECM Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the M1 MAF meter connector.
2. Connect terminal THA of the E4 ECM connector and terminal E2 of the E2 ECM connector.
  HINT:
  
  Before checking, perform a visual and contact pressure check for the ECM connector.
3. Connect the Techstream to the DLC3.
4. Turn the ignition switch to ON and turn the Techstream on.
5. Enter the following menus: Powertrain / Engine / Data List / Intake Air.
6. Read the value.
  Standard
  
  Temperature value is 140°C (284°F) or more
NG → See step 6

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
READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS)

Fig 3: Checking M1 MAF Meter And ECM Wire Harness
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the M1 MAF meter connector.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch to ON and turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Intake Air.
5. Read the value.
  Standard
  
  Temperature value is -40°C (-40°F)
NG → See step 8

OK → See step 9
READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN HARNESS OR ECM)

Fig 4: Disconnecting E2 And E4 ECM Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the M1 MAF meter connector.
2. Disconnect the E2 and E4 ECM connectors.
3. Connect the Techstream to the DLC3.
4. Turn the ignition switch to ON and turn the Techstream on.
5. Enter the following menus: Powertrain / Engine / Data List / Intake Air.
6. Read the value.
  Standard
  
  Temperature value is -40°C (-40°F)
NG → See step 10

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - INTAKE AIR TEMPERATURE SENSOR)
REPLACE MASS AIR FLOW METER. Refer to REMOVAL
REPLACE ECM. Refer to REMOVAL