DTC    P0097    Intake Air Temperature Sensor 2 Circuit Low

DTC    P0098    Intake Air Temperature Sensor 2 Circuit High

DTC    P0112    Intake Air Temperature Circuit Low Input

DTC    P0113    Intake Air Temperature Circuit High Input

для подготовки Нажмите здесь


DESCRIPTION

A067628E26
  1. The Intake Air Temperature (IAT) sensor, mounted on the Mass Air Flow (MAF) meter, monitors the IAT. The IAT sensor has a built-in thermistor with a resistance that varies according to the temperature of the intake air. When the IAT is low, the resistance of the thermistor increases. When the temperature is high, the resistance drops. These variations in resistance are transmitted to the ECM as voltage changes (See Fig. 1).
  2. The IAT sensor is powered by a 5 V supply from the THA and THAR terminal of the ECM, via resistor R.
  3. Resistor R and the IAT sensor are connected in series. When the resistance value of the IAT sensor changes, according to changes in the IAT, the voltage at terminal THA and THAR also varies. Based on this signal, the ECM increases the fuel injection volume when the engine is cold to improve drivability.

    УКАЗАНИЕ:
    When any of DTCs P0097, P0098, P0112 and P0113 are set, the ECM enters fail-safe mode. During fail-safe mode, the IAT is estimated to be 20°C (68°F) by the ECM. Fail-safe mode continues until a pass condition is detected.


DTC No.
DTC Detection Condition
Trouble Area
P0097
Short in Intake Air Temperature (IAT) sensor 2 circuit for 0.5 seconds
(1 trip detection logic)
  1. Short in IAT sensor 2 circuit
  2. IAT sensor 2 (built into MAF meter)
  3. ECM
P0098
Open in Intake Air Temperature (IAT) sensor 2 circuit for 0.5 seconds
(1 trip detection logic)
  1. Open in IAT sensor 2 circuit
  2. IAT sensor 2 (built into MAF meter)
  3. ECM
P0112
Short in Intake Air Temperature (IAT) sensor 1 circuit for 0.5 seconds
(1 trip detection logic)
  1. Short in IAT sensor 1 circuit
  2. IAT sensor 1 (built into MAF meter)
  3. ECM
P0113
Open in Intake Air Temperature (IAT) sensor 1 circuit for 0.5 seconds
(1 trip detection logic)
  1. Open in IAT sensor 1 circuit
  2. IAT sensor 1 (built into MAF meter)
  3. ECM

УКАЗАНИЕ:
When any of these DTCs are set, check the IAT by entering the following menus on the intelligent tester: Powertrain / Engine / Data List / Intake Air Bank 1 or Intake Air Bank 2.

Temperature Displayed
Malfunction
-40°C (-40°F)
Open circuit
140°C (284°F) or higher
Short circuit


MONITOR DESCRIPTION

The ECM monitors the sensor voltage and uses this value to calculate the Intake Air Temperature (IAT). When the sensor output voltage deviates from the normal operating range, the ECM interprets this as a malfunction in the IAT sensor and sets a DTC.
Example:
If the sensor output is less than -40°C (-40°F) for 0.5 seconds or more, the ECM determines that there is an open in the IAT sensor circuit, and sets DTC P0098 or P0113. Conversely, if the output is more than 140°C (284°F) for 0.5 seconds or more, the ECM determines that there is a short in the sensor circuit, and sets DTC P0097 or P0112.
If the malfunction is not repaired successfully, a DTC is set 0.5 seconds after the engine is next started.

WIRING DIAGRAM


A147855E02


INSPECTION PROCEDURE

УКАЗАНИЕ:
  1. If other DTCs relating to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
  1. Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1.READ VALUE USING INTELLIGENT TESTER (INTAKE AIR TEMPERATURE)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the tester ON.

  1. Enter the following menus: Powertrain / Engine / Data List / Intake Air Bank 1 or Intake Air Bank 2.

  1. Read the value displayed on the tester.

    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

    УКАЗАНИЕ:
    1. If there is an open circuit, the intelligent tester indicates -40°C (-40°F).
    1. If there is a short circuit, the intelligent tester indicates 140°C (284°F) or higher.



B
Перейдите к шагу 4

C
CHECK FOR INTERMITTENT PROBLEMS (Нажмите здесь)
A


2.READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN WIRE HARNESS)
A127961E08

  1. Disconnect the E13 or E22 MAF meter connector.

  1. Connect terminals THA and E2 or THAR and E2R of the MAF meter wire harness side connector.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the tester ON.

  1. Enter the following menus: Powertrain / Engine / Data List / Intake Air Bank 1 or Intake Air Bank 2.

  1. Read the value displayed on the tester.

    Standard:
    140°C (284°F) or higher



OK
CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE MASS AIR FLOW METER (Нажмите здесь)
NG


3.READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN ECM)
A107688E33

  1. Disconnect the E13 or E22 MAF meter connector.

  1. Connect terminals THA and E2 or THA2 and E2 of the E1 ECM connector.

    УКАЗАНИЕ:
    Before checking, do visual and contact pressure checks on the ECM connector.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the tester ON.

  1. Enter the following menus: Powertrain / Engine / Data List / Intake Air Bank 1 or Intake Air Bank 2.

  1. Read the value displayed on the tester.

    Standard:
    140°C (284°F) or higher



OK
REPAIR OR REPLACE HARNESS OR CONNECTOR
NG

CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM (Нажмите здесь)  

4.READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS)
A084869E74

  1. Disconnect the E13 or E22 MAF meter connector.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the tester ON.

  1. Enter the following menus: Powertrain / Engine / Data List / Intake Air Bank 1 or Intake Air Bank 2.

  1. Read the value displayed on the tester.

    Standard:
    -40°C (-40°F)



OK
REPLACE MASS AIR FLOW METER (Нажмите здесь)
NG


5.READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN ECM)
A110902E04

  1. Disconnect the E13 or E22 MAF meter connector.

  1. Disconnect the E1 ECM connector.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the tester ON.

  1. Enter the following menus: Powertrain / Engine / Data List / Intake Air Bank 1 or Intake Air Bank 2.

  1. Read the value displayed on the tester.

    Standard:
    -40°C (-40°F)



OK
REPAIR OR REPLACE HARNESS OR CONNECTOR
NG

REPLACE ECM (Нажмите здесь)