P0404: Valve Position Control Failure - Dc Motor Out Of Range; Dtc: P0404 - Hino Motors HINO 155 series Workshop Manual

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DTC: P0404

P0404: Valve position control failure - DC motor out of range, functional
(EGR valve stick failure)
INFORMATION
1. Technical description
• EGR valve is a butterfly type.
• EGR valve opening is controlled by engine speed and amount of intake air.
• EGR valve opening is adjusted by engine ECU and CAN communication.
• EGR valve will not operate when engine coolant temperature is low (≤ 40 C {104 F}).
• Wiping operation from "fully open  fully closed" is conducted as an EGR valve surface cleaning operation when
the key is LOCK.
<Description of malfunction>
• Failure message is received from EGR controller.
2. DTC set condition
(1) DTC detection condition
• Starter key "ON".
• A target EGR valve opening is 10 C {50 F} or more.
• The battery voltage is in the range of 10 to 16 V.
• The engine is stopped, or the engine speed remains at 500 r/min or more for 5 seconds or more.
• The intercooler temperature sensor is -15 C {5 F} or more.
(2) Judgement criteria
• The condition that Duty is 40% or more during motor control mode remains for 3 seconds or more.
The above content is judged if any of the following conditions is met:
• When 600 seconds elapses if the intercooler temperature sensor is -15 C {5 F}.
• When 360 seconds elapses if the intercooler temperature sensor is 0 C {32 F}.
• Instant if the intercooler temperature sensor is higher than 0 C {32 F}.
ENGINE (J05E)/TROUBLESHOOTING
Engine ECU
VNT EGR
controller actuator
Resistor
Actuator power
relay
Y2E Y4J Z90
NAT X36 $4
EN01H02127030602016076
SHTS021270300460