DTC P0112: Intake Air Temperature Circuit Low Input; DTC P0113: Intake Air Temperature Circuit High Input [08/2014 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Intake Air.
5. Read the value displayed on the Techstream.

   OK

   Same as actual intake air temperature.

   RESULT
   
   

   Result	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).

Result:  B

B 

See step  4

Result:  C

C 

CHECK FOR INTERMITTENT PROBLEMS 

(See article. Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2014 - ] )

Result:  A

A 

See step  2

1. Disconnect the mass air flow meter sub-assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1	Mass Air Flow Meter Sub-assembly	*2	ECM
   *a	Front view of wire harness connector (to Mass Air Flow Meter Sub-assembly)	-	-

2. Connect terminals 1 (THA) and 2 (E2) of the mass air flow meter sub-assembly connector on the wire harness side.
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 / Primary / Intake Air.
7. Read the value displayed on the Techstream.

   Standard value

   Higher than 128°C (262°F)

   HINT: 

   Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly (See article. Refer to INITIALIZATION [08/2014 - ] ).

Result:  OK

OK 

REPLACE MASS AIR FLOW METER SUB-ASSEMBLY 

(See article. Refer to REMOVAL [08/2014 - ] )

Result:  NG

NG 

See step  3

1. Disconnect the mass air flow meter sub-assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D5-1 (THA) - D27-116 (THA)	Always	Below 1 Ω
   D5-2 (E2) - D27-93 (ETHA)	Always	Below 1 Ω

Result:  OK

OK 

REPLACE ECM 

(See article. Refer to REMOVAL [08/2014 - ] )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the mass air flow meter sub-assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1	Mass Air Flow Meter Sub-assembly
   *2	ECM

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 / Primary / Intake Air.
6. Read the value displayed on the Techstream.

   Standard value

   -40°C (-40°F)

   HINT: 

   Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly (See article. Refer to INITIALIZATION [08/2014 - ] ).

Result:  OK

OK 

REPLACE MASS AIR FLOW METER SUB-ASSEMBLY 

(See article. Refer to REMOVAL [08/2014 - ] )

Result:  NG

NG 

See step  5

1. Disconnect the mass air flow meter sub-assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D5-1 (THA) or D27-116 (THA) - Body ground	Always	10 kΩ or higher

Result:  OK

OK 

REPLACE ECM 

(See article. Refer to REMOVAL [08/2014 - ] )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR