ENGINE (J05E)/TROUBLESHOOTING 2–501
P0406: Valve position sensor magnet lost (EGR actuator position sensor signal too high)
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}).
• DTC is issued when failure message is received from EGR actuator unit.
<Description of malfunction>
• EGR actuator system is malfunctioning.
2. DTC set condition
(1) DTC detection condition
• Starter key is turned "ON".
• Battery voltage is in the range of 10 V to 16 V.
• The engine is stopped, or the engine speed remains at 500 r/min or more for 5 seconds or more.
(2) Judgement criteria
• The condition that the magnetic flux of the position sensor is less than 35kA/m remains for 1 second or more.
3. Reset condition
• After normal status is resumed and accelerator opening is fully closed.
4. Indication, warning or system control regulation when the DTC is set.
• MIL: ON
• SVS light: OFF
• Fuel injection limit
YM5
YM6
(CAN+)
(CAN-)
NFA
NFB
(CANH)
(CANL)
Y4K
Y4J
(GND)
#XG
#XV
(CANH)
(CANL)
Z90
Y2E
Z90
$4
Y4J
X36
(E)
(+B)
(+B)
X36
(L)
Y2E
NAT
Actuator power
relay
EGR
actuator
VNT
controller
Engine ECU Resistor
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