Mitsubishi Fuso CANTER FE85DE6SLGP, Shop Manual

Page: 223 / 336

13E-36
P0478: Exhaust Brake PWR (High) (warning lamp flashes: 93)
P0500: Vehicle Speed Sensor (warning lamp flashes: 25)
P0508: Idle Volume & Idle Acc (Low) (warning lamp flashes: 31)
P0509: Idle Volume & Idle Acc (High) (warning lamp flashes: 31)
P0562: Power Supply Voltage (Low) (warning lamp flashes: 33)
Generation condition Exhaust shutter 3-way magnetic valve circuit is shorted to power supply.
Recoverability
System recovers if any valid signal is input when starter switch is turned from
OFF to ON (the warning lamp does not extinguish unless 3 consecutive valid sig-
nals are input).
Control effected by electronic control unit
• Control of auxiliary brake function is deactivated.
• White smoke reduction control is deactivated if idling condition is held for an
extended period of time.
Possible causes
• Short-circuited harness between engine electronic control unit and exhaust
shutter 3-way magnetic valve
• Malfunction of each connector
• Malfunction of exhaust shutter 3-way magnetic valve
• Malfunction of engine electronic control unit
Generation condition No vehicle speed sensor signals are received.
Recoverability
System recovers if any valid signal is input when starter switch is turned from
OFF to ON (the warning lamp does not go out unless 3 consecutive valid signals
are input).
Control effected by electronic control unit Engine speed is limited.
Possible causes
• Open-circuited or short-circuited harness between engine electronic control
unit and pulse divider (built in meter cluster)
• Malfunction of each connector
• Malfunction of pulse divider (built in meter cluster)
• Malfunction of engine electronic control unit
Generation condition
Idling speed adjustment potentiometer voltage is at or below the specified value
(0.7 V).
Recoverability
System recovers if any valid signal is input when starter switch is turned from
OFF to ON (the warning lamp does not go out unless 3 consecutive valid signals
are input).
Control effected by electronic control unit Engine idling speed control is fixed to automatic control.
Possible causes
• Open-circuited or short-circuited harness between engine electronic control
unit and idling speed adjustment potentiometer
• Malfunction of each connector
• Malfunction of idling speed adjustment potentiometer
• Malfunction of engine electronic control unit
Generation condition
Idling speed adjustment potentiometer voltage is at or above the specified value
(4.6 V).
Recoverability
System recovers if any valid signal is input when starter switch is turned from
OFF to ON (the warning lamp does not go out unless 3 consecutive valid signals
are input).
Control effected by electronic control unit Engine idling speed control is fixed to automatic control.
Possible causes
• Open-circuited or short-circuited harness between engine electronic control
unit and idling speed adjustment potentiometer
• Malfunction of each connector
• Malfunction of idling speed adjustment potentiometer
• Malfunction of engine electronic control unit
Generation condition Battery voltage is too low.
Recoverability
System recovers if any valid signal is input when starter switch is turned from
OFF to ON (the warning lamp does not go out unless 3 consecutive valid signals
are input).
Control effected by electronic control unit Control of engine is stopped.
Possible causes • Malfunction of electronic control unit (Replacement of electronic control unit)
TROUBLESHOOTING