Air Heater Relay Driving Circuit Abnormality (Dtc P0380 / 523544-3 / 523544-4) - Kubota V3800-CR-TE4 Diagnosis Manual

V3800-CR-TE4,V3800-CR-TIE4, DM
(20) Air Heater Relay Driving Circuit Abnormality (DTC P0380 / 523544-3 /
523544-4)
NOTE
• This item is a check related to the air heater (pre) 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 relay driving circuit
Behaviour during malfunction (At low temperature):
• Faulty starting
• Increase in white smoke
Detection item:
• +B short of air heater relay driving circuit
DTC set preconditions:
• Battery voltage is normal
• During air heater relay drive command is activated
DTC set parameter:
• +B short circuit of harness
Engine warning light:
• ON
System action:
• None
Recovery from error:
• Key switch turn OFF
P0380 / 523544-4: Ground short of air heater relay driving circuit
Behaviour during malfunction (At low temperature):
• Faulty starting
• Increase in white smoke
Detection item:
• Ground short or open circuit of air heater relay driving circuit
DTC set preconditions:
• Battery voltage is normal
• Other than during air heater relay drive command is activated
DTC set parameter:
• Open circuit of harness, Ground short circuit
Engine warning light:
• ON
System action:
• None
Recovery from error:
• Key switch turn OFF
1-S187
COMMON RAIL SYSTEM
9Y1200192CRS0729US0
9Y1200192CRS0730US0
KiSC issued 05, 2012 A