ENGINE (J05E)/TROUBLESHOOTING
2–534
DTC: P0489 and P0490
EN01H02127030602016083
P0489: EGR valve controller motor (open circuit) (EGR actuator motor open circuit)
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 actual current applied to the motor built-in the EGR actuator is 0.6 A or less remains for
2 seconds or more.
3.
Reset condition
•
After normal status is resumed and the starter key is turned "LOCK".
YM5
YM6
(CAN+)
(CAN-)
NF
A
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
SHTS021270300491
