ENGINE (J05E)/TROUBLESHOOTING
2–806
DTC: P14BF
EN01H02127030602016135
P14BF: EGR valve controller temperature sensor 1, 2 - rationality
(EGR actuator temp. sensor 1 performance invalid)
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".
•
The temperature sensor in the actuator 1 (FET side) is in the range of -20 to 170
C {-4 to 338
F}.
•
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.
(2)
Judgement criteria
•
The condition that the difference between the temperature sensor 1 in the actuator (FET side) and the tem-
perature sensor in the actuator 2 (CPU side) is 30
C {86
F} or more remains for 2 seconds or more.
3.
Reset condition
•
After normal status is resumed and accelerator opening is fully closed.
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
SHTS021270300728
