DTC P0072: Ambient Air Temperature Sensor Circuit Low Input; DTC P0073: Ambient Air Temperature Sensor Circuit High Input [06/2016 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Trouble Codes.
5. Read DTCs.
   RESULT
   
   

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2016 - 03/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - ] )

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Trouble Codes.
5. Read DTCs.
   RESULT
   
   

   Result	Proceed to
   DTC is not output	A
   DTC B1509 is output	B

Result: 

B 

GO TO METER / GAUGE SYSTEM 

(Refer to DTC B1509: Open in Ambient Temperature Sensor Circuit [06/2016 - ] )

Result: 

A 

See step  3

1. Disconnect the ambient air temperature sensor connector.
2. Disconnect the combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   A48-1 - D7-24 (TAM)	Always	Below 1 Ω
   A48-2 - D7-25 (SG-)	Always	Below 1 Ω

   Standard Resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   A48-1 or D7-24 (TAM) - Body ground	Always	10 kΩ or higher
   A48-2 or D7-25 (SG-) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Inspect the ambient air temperature sensor (Refer to INSPECTION [06/2016 - ] ).

Result: 

NG 

REPLACE AMBIENT AIR TEMPERATURE SENSOR 

(Refer to REMOVAL [06/2016 - ] )

Result: 

OK 

See step  5

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Clear the DTCs (Refer to DTC CHECK / CLEAR [06/2016 - ] ).
5. Turn the ignition switch off and wait for at least 30 seconds.
6. Turn the ignition switch to ON and turn the Techstream on.
7. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
8. Enter the following menus: Powertrain / Engine / Trouble Codes.
9. Read DTCs.
   RESULT
   
   

   Result	Proceed to
   DTC is not output	A
   DTC P0072 or P0073 is output	B

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS 

(Refer to CHECK FOR INTERMITTENT PROBLEMS [06/2016 - ] )

Result: 

B 

REPLACE ECM 

(Refer to REMOVAL [06/2016 - ] )