Dtc P1115 Coolant Temperature Sensor Circuit For Coolant Heat Storage System / Intake Air Temperature Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
READ VALUE USING GTS (INTAKE AIR TEMPERATURE)
CHECK HARNESS AND CONNECTOR (CHECK FOR OPEN)
CHECK HARNESS AND CONNECTOR (ECM - INTAKE AIR TEMPERATURE SENSOR)
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT)
CHECK HARNESS AND CONNECTOR (ECM - INTAKE AIR TEMPERATURE SENSOR)
DTC P1115 Coolant Temperature Sensor Circuit for Coolant Heat Storage System / Intake Air Temperature Circuit |
DESCRIPTION
The intake air temperature sensor senses the intake air temperature. A thermistor built in this sensor changes the resistance value according to the intake air temperature as shown in the illustration. This resistance value of intake air temperature sensor is one of the factors used to decide the fuel injection volume.
DTC No.
| DTC Detection Condition
| Trouble Area
|
P1115
| Open or short in intake air temperature sensor circuit for 0.5 seconds or more.
| - Open or short in intake air temperature sensor circuit
- Intake air temperature sensor
- ECM
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
| 1.READ VALUE USING GTS (INTAKE AIR TEMPERATURE) |
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air.
Read the value.
- Result:
Display
| Proceed
|
-40°C (-40°F)
| A
|
140°C (284°F) or more
| B
|
The same as actual engine coolant temperature
| C
|
- HINT:
- If there is an open circuit, the GTS indicates -40°C (- 40°F).
- If there is a short circuit, the GTS indicates 140°C (284°F) or more.
| 2.CHECK HARNESS AND CONNECTOR (CHECK FOR OPEN) |
Disconnect the intake air temperature sensor connector.
Connect terminals 1 and 2 of the intake air temperature sensor harness side connector.
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air.
Read the value.
- Temperature:
- 140°C (284°F) or more
Text in Illustration*1
| Intake Air Temperature Sensor
|
*2
| ECM
|
*a
| Front view of wire harness connector
(to Intake Air Temperature Sensor)
|
| OK |
|
|
|
| REPLACE INTAKE AIR TEMPERATURE SENSOR |
|
| 3.CHECK HARNESS AND CONNECTOR (ECM - INTAKE AIR TEMPERATURE SENSOR) |
Disconnect the intake air temperature sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
C104-2 - C162-22 (THA)
| Always
| Below 1 Ω
|
C104-1 - C162-30 (ETHA)
| Always
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 4.CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT) |
Disconnect the intake air temperature sensor connector.
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air.
Read the value.
- Temperature:
- -40°C (-40°F) or more
Text in Illustration*1
| Intake Air Temperature Sensor
|
*2
| ECM
|
| OK |
|
|
|
| REPLACE INTAKE AIR TEMPERATURE SENSOR |
|
| 5.CHECK HARNESS AND CONNECTOR (ECM - INTAKE AIR TEMPERATURE SENSOR) |
Disconnect the intake air temperature sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
C104-2 or C162-22 (THA) - Body ground
| Always
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
