Hino P0113 Fault Code: Intake Air Temperature Sensor (Air Flow Sensor Built-In) – Out Of Range (Out Of Range High)

Technical description

The intake air temperature sensor built in the air flow sensor consistently measures intake air temperature.

Description of malfunction

The intake air temperature cannot be correctly recognized.

Dtc set condition

DTC Detection Condition:

• Starter switch ON.
• Battery voltage is in the range of 10 V to 16 V.

The conditions described above remain for 5 seconds or longer.

Judgment Criteria:

Output of the intake air temperature sensor remains less than 4.55 V (-40°C {-40°F}) for 3 seconds or longer.

Reset condition

After restoration to normal condition.

Indication, warning or system control regulation when the dtc is set

• MIL: ON
• SVS light: OFF

Pre-inspection work

Check that the battery voltage is in the normal range.

After-inspection work

• Clear all past DTCs.
• Check that no DTC is stored after test drive.

Possible causes

• Abnormality in resistance of sensor.
• Failure in engine ECU sensor power supply, internal circuit failure.
• Disconnection or short-circuit in sensor harness.
• Faulty connector contact or fit.
• Internal sensor short-circuits.

Inspection procedure

Troubleshooting steps

Step 1) Inspect the intake air temperature sensor connector.

Check the connection of the intake air temperature sensor (air flow sensor) connector (Looseness and poor contact).

Were any failures found?

Step 2) Inspect the intake air temperature sensor.

1. Check the installation of the intake air temperature sensor (air flow sensor).
2. Make sure there is no dirt or damage to the intake air temperature sensor (air flow sensor).

Were any failures found?

Step 3) Inspect the intake air temperature sensor unit.

1. Set the starter switch to the “LOCK” position.
2. Disconnect the connector of intake air temperature sensor (air flow sensor built-in).
3. Measure the resistance between the terminals of the intake air temperature sensor (air flow sensor built-in).

Do the measurements meet the standard value?

Step 4) Inspect the intake air temperature sensor power supply.

1. Set the starter switch to the “ON” position.
2. Measure the voltage between the terminals of the intake air temperature sensor (air flow sensor built-in) (vehicle-side connector).

Do the measurements meet the standard value?

Step 5) Inspect for short-circuit in wire harness of intake air temperature sensor.

1. Set the starter switch to the “LOCK” position.
2. Connect the signal check harness to the engine ECU vehicle-side harness. (Do not connect the harness to the ECU).
3. Use the electrical tester to measure the resistance between each terminal in the engine ECU (signal check harness) and ground.

Do the measurements meet the standard value?

Step 6) Inspect for disconnection in wire harness of intake air temperature sensor.

1. Connect the intake air temperature sensor connector.
2. Use the electrical tester to measure the resistance between the terminals of the engine ECU (signal check harness).

Do the measurements meet the standard value?

Step 7) Check the DTC detected (Engine ECU) [Diagnostic Tool].

1. Warm-up the engine. (Engine coolant temperature: 60°C {140°F} or more).
2. Stop the engine and set the starter switch to the “LOCK” position.
3. Connect the vehicle to the diagnostic tool.
4. Set the starter switch to the “ON” position.
5. Select [Engine] and check if the DTC P0113 has been detected

Has DTC P0113 been detected?

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