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