ENGINE (J05E)/TROUBLESHOOTING2–790
P14B4: Battery voltage (low) (EGR actuator power supply too low)
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 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 actuator power supply voltage is less than 7 V remains for 1.06 seconds 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
• Engine output is restricted.
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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