Air Heater (Glow) Relay Driving Circuit Abnormality (Dtc P0380 / 523544-3 / 523544-4) - Kubota 07-CR-E5 Manual

07-CR-E5,07-CR-TE5,07-CR-TIE5, DM
(22) Air Heater (Glow) Relay Driving Circuit Abnormality (DTC P0380 /
523544-3 / 523544-4)
NOTE
• This item is a check related to the air heater (glow) relay control. Even if it is normal, air heating may not
work. If this happens, look for the malfunction in accordance with the following procedure.
P0380 / 523544-3: +B short of air heater (glow) relay driving circuit
Behaviour during malfunction (At low temperature):
• Faulty starting
• Increase in white smoke
Detection item:
[Engine ECU (Denso)]
• +B short of air heater (glow) relay driving circuit
[Engine ECU (Kubota)]
• +B short or open circuit of air heater (glow) relay driving circuit
DTC set preconditions:
• Battery voltage is normal
• During air heater (glow) relay drive command is activated
DTC set parameter:
[Engine ECU (Denso)]
• +B short circuit of harness
[Engine ECU (Kubota)]
• +B short or open circuit of harness
Engine warning light:
• ON
Limp home action by engine ECU (system action):
• None
Recovery from error:
• Key switch turn OFF
P0380 / 523544-4: Ground short of air heater (glow) relay driving circuit
Behaviour during malfunction (At low temperature):
• Faulty starting
• Increase in white smoke
Detection item:
[Engine ECU (Denso)]
• Ground short or open circuit of air heater (glow) relay driving circuit
[Engine ECU (Kubota)]
• Ground short circuit of air heater (glow) relay driving circuit
DTC set preconditions:
• Battery voltage is normal
• Other than during air heater (glow) relay drive command is activated
DTC set parameter:
[Engine ECU (Denso)]
• Ground short or open circuit of harness
[Engine ECU (Kubota)]
• Ground short circuit of harness
Engine warning light:
• ON
Limp home action by engine ECU (system action):
• None
Recovery from error:
• Key switch turn OFF
1-S200
COMMON RAIL SYSTEM
9Y3200007CRS0287US0
9Y3200007CRS0288US0
KiSC issued 03, 2022 A