Hino Motors HINO 155 series Workshop Manual page 224

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7. After-inspection work
• Clear all past DTCs.
• Check that no DTC is stored after test drive.
8. Estimated failure factors
• Disconnection or short-circuit in sensor harness
• Poor connector contact or faulty connector fit.
• Intake air temperature sensor (intake manifold):
- Loose/disconnected sensor or failure in sensing area (contamination, clogging or breakage)
- Abnormality in resistance of sensor
• Failure in engine ECU sensor power supply, malfunction of internal circuit.
ENGINE (J05E)/TROUBLESHOOTING