Rail Pressure M/V 1 (Over Load) Troubleshooting; Rail Pressure M/V 1 (Long Short) Troubleshooting; Rail Pressure M/V 2 (Over Load) Troubleshooting - Mitsubishi 6M70 Workshop Manual

TROUBLESHOOTING <DIAGNOSIS USING Multi-Use Tester>
P1259: Common Rail Pressure M/V 2 (warning lamp flashes: 63)
Generation condition
Recoverability
Control effected by electronic control unit
Actuator test
Electronic control unit connector
Inspection
Electrical equipment
Electric circuit diagram
P125A: Rail Pressure M/V 1 (Over load) (warning lamp flashes: 63)
Generation condition
Recoverability
Control effected by electronic control unit
Service data
Actuator test
Inspection Electronic control unit connector
Electrical equipment
Electric circuit diagram
P125B: Rail Pressure M/V 1 (Long Short) (warning lamp flashes: 63)
Generation condition
Recoverability
Control effected by electronic control unit
Service data
Actuator test
Inspection Electronic control unit connector
Electrical equipment
Electric circuit diagram
P125C: Rail Pressure M/V 2 (Over Load) (warning lamp flashes: 63)
Generation condition
Recoverability
Control effected by electronic control unit
Service data
Actuator test
Inspection Electronic control unit connector
Electrical equipment
Electric circuit diagram
13-46
MPROP2 (rail pressure control valve) circuit shorted to ground or open-circuited
(low level when turned OFF) as detected for 0.3 second.
System recovers (power is re-supplied to electronic control unit) if signal becomes
normal when starter switch is turned OFF (2 minutes or more) → ON.
• Injection quantity is limited. (Output is reduced, and exhaust emissions wors-
en.)
• Exhaust gas recirculation control is stopped.
• Auto cruise control is stopped.
B9: Fuel Leak Check
: MPROP2 (rail pressure control valve)
14
#574: MPROP2 (rail pressure control valve)
MPROP2 (rail pressure control valve) system
MPROP1 (rail pressure control valve) driving current value remains higher than
2A for 10 seconds.
System recovers (power is re-supplied to electronic control unit) if signal becomes
normal when starter switch is turned OFF (2 minutes or more) → ON.
• Injection quantity is limited. (Output is reduced, and exhaust emissions wors-
en.)
• Exhaust gas recirculation control is stopped.
• Auto cruise control is stopped.
0C: Difference Common Rail Pressure
B9: Fuel Leak Check
: MPROP1 (rail pressure control valve)
14
#574: MPROP1 (rail pressure control valve)
MPROP1 (rail pressure control valve) system
MPROP1 (rail pressure control valve) circuit remains shorted to ground as detect-
ed for 10 seconds.
System recovers (power is re-supplied to electronic control unit) if signal becomes
normal when starter switch is turned OFF (2 minutes or more) → ON.
Engine is stopped 50 seconds after the diagnosis code is generated.
0C: Difference Common Rail Pressure
B9: Fuel Leak Check
14 : MPROP1 (rail pressure control valve)
#574: MPROP1 (rail pressure control valve)
MPROP1 (rail pressure control valve) system
MPROP2 (rail pressure control valve) driving current value remains higher than
2A for 10 seconds.
System recovers (power is re-supplied to electronic control unit) if signal becomes
normal when starter switch is turned OFF (2 minutes or more) → ON.
• Injection quantity is limited. (Output is reduced, and exhaust emissions wors-
en.)
• Exhaust gas recirculation control is stopped.
• Auto cruise control is stopped.
0C: Difference Common Rail Pressure
B9: Fuel Leak Check
: MPROP2 (rail pressure control valve)
14
#574: MPROP2 (rail pressure control valve)
MPROP2 (rail pressure control valve) system