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

1. Connect the Techstream to the DTC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
4. Read the DTCs.

   Result

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

B → See step   5 

C → See step   3 

A: Go to next step 

1. Put the engine in inspection mode. Refer to INSPECTION MODE PROCEDURE .
2. Connect the Techstream to the DLC3.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / 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) or higher	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) or higher.

B → See step   5 

C → CHECK FOR INTERMITTENT PROBLEMS 

A: Go to next step 

Fig 1: Connecting Terminals THA And E2 Of MAF Meter Wire Harness Side Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the E42 Mass Air Flow (MAF) meter connector.
2. Connect terminals THA and E2 of the MAF meter wire harness side connector.
3. Connect the Techstream to the DLC3.
4. Turn the power switch on (IG).
5. Turn the Techstream on.
6. Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air.
7. Read the value displayed on the Techstream.

   Standard

   140°C (284°F) or higher

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 E42 MAF meter connector.
2. Disconnect the E83 ECM connector.
3. Measure the resistance.

   Standard resistance

   Tester Connection	Specified Condition
   THA (E42-4) - THA (E83-55)	Below 1 Ω
   E2 (E42-5) - E3 (E83-97)	Below 1 Ω

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   7 

Fig 2: Checking Short In Wire Harness

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the E42 MAF meter connector.
2. Connect the Techstream to the DLC3.
3. Turn the power switch on (IG).
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Engine and ECT / 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 E42 MAF meter connector.
2. Disconnect the E83 ECM connector.
3. Measure the resistance.

   Standard resistance

   Tester Connection	Specified Condition
   THA (E42-4) or THA (E83-55) - Body ground	10 kΩ or higher

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8