DTC    P0095/23    Intake Air Temperature Sensor 2 Circuit

DTC    P0097/23    Intake Air Temperature Sensor 2 Circuit Low

DTC    P0098/23    Intake Air Temperature Sensor 2 Circuit High

for Preparation Click here


DESCRIPTION

G036559E03
The diesel turbo Intake Air Temperature (IAT) sensor is built into the charge air cooler and senses the IAT. A built-in thermistor of the sensor changes the resistance value according to the intake air temperature. The lower the IAT is, the greater the thermistor resistance value becomes, and the higher the temperature is, the lower the resistance value becomes (see Fig. 1).
The sensor is connected to the ECM. The 5 V power source voltage in the ECM is applied to the sensor from terminal THIA via resistor R. Resistor R and the sensor are connected in series. When the resistance value of the sensor changes in accordance with changes in the IAT, the potential at terminal THIA also changes. Based on this signal, the ECM corrects the fuel injection volume to improve the driveability with a cold engine.

DTC No.
DTC Detection Condition
Trouble Area
P0095/23
Open or short in diesel turbo IAT sensor circuit for 0.5 seconds
(1 trip detection logic)
  1. Open or short in diesel turbo IAT sensor circuit
  2. Diesel turbo IAT sensor
  3. ECM
P0097/23
Short in diesel turbo IAT sensor circuit for 0.5 seconds
(sensor resistance value less than 25 Ω [sensor output voltage less than 0.05 V])
(1 trip detection logic)
  1. Open or short in diesel turbo IAT sensor circuit
  2. Diesel turbo IAT sensor
  3. ECM
P0098/23
Open in diesel turbo IAT sensor circuit for 0.5 seconds
(sensor resistance value more than 156 kΩ [sensor output voltage more than 4.9 V])
(1 trip detection logic)
  1. Open or short in diesel turbo IAT sensor circuit
  2. Diesel turbo IAT sensor
  3. ECM

WIRING DIAGRAM


A099771E03


INSPECTION PROCEDURE

HINT:
  1. If DTCs related to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit.
  2. Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, and other data from the time the malfunction occurred.

NOTICE:
If the ECM is replaced, the new ECM needs initialization (Click here).

1.CHECK ECM (THIA VOLTAGE)
A053763E30

  1. Turn the ignition switch ON.

  1. Measure the voltage of the ECM connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E8-20 (THIA) - E8-28 (E2)
    		20°C (68°F)
    		0.5 to 3.4 V



OK
CHECK FOR INTERMITTENT PROBLEMS
NG


2.INSPECT DIESEL TURBO INTAKE AIR TEMPERATURE SENSOR
A111100E01

  1. Remove the sensor.

  1. Measure the resistance of the sensor.

    Standard resistance:
    Connection
    		Specified Condition
    20°C (68°F)
    		2.21 to 2.65 kΩ

    NOTICE:
    When checking the IAT sensor in the water, keep the terminals dry. After the check, wipe the sensor dry.



NG
REPLACE DIESEL TURBO INTAKE AIR TEMPERATURE SENSOR
OK


3.CHECK WIRE HARNESS (ECM - DIESEL TURBO INTAKE AIR TEMPERATURE SENSOR)
A096606E02

  1. Disconnect the I4 diesel turbo IAT sensor connector.

  1. Disconnect the E8 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    E8-20 (THIA) - I4-2
    		Below 1 Ω
    E8-28 (E2) - I4-1
    		Below 1 Ω
    E8-20 (THIA) or I4-2 - Body ground
    		10 kΩ or higher
    E8-28 (E2) or I4-1 - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ECM