Двигатели Scania четвёртой серии. Руководство - часть 156

62

ã

03:04-06

Fault code 4404

Fault

Internal fault in the control unit.

Cause

A memory fault has occurred in the control 
unit.

Remarks

The vehicle cannot be started or driven as long 
as the fault is active.

Action

Clear the fault code memory and try to start the 
vehicle. If the fault code is regenerated and the 
vehicle does not start, renew the control unit.

If the vehicle starts, drive the vehicle for 
approximately 10 minutes.

Check if the fault code has been generated 
again. If the fault code has been regenerated, 
renew the control unit.

Fault code 4405

Fault

Internal fault in the control unit.

Cause

A memory fault has occurred in the control 
unit.

Remarks

The vehicle cannot be started or driven as long 
as the fault is active.

Action

Clear the fault code memory and try to start the 
vehicle. If the fault code is regenerated and the 
vehicle does not start, renew the control unit.

If the vehicle starts, drive the vehicle for 
approximately 10 minutes.

Check if the fault code has been generated 
again. If the fault code has been regenerated, 
renew the control unit.

Fault codes

03:04-06

ã

63

Fault code 4406

Fault

Internal fault in the control unit.

Cause

A memory fault has occurred in the control 
unit.

Remarks

The vehicle cannot be started or driven as long 
as the fault is active.

Action

Clear the fault code memory and try to start the 
vehicle. If the fault code is regenerated and the 
vehicle does not start, renew the control unit.

If the vehicle starts, drive the vehicle for 
approximately 10 minutes.

Check if the fault code has been generated 
again. If the fault code has been regenerated, 
renew the control unit.

Fault code 4407

Fault

Internal fault in the control unit.

Cause

A memory fault has occurred in the control 
unit.

Remarks

The vehicle cannot be started or driven as long 
as the fault is active.

Action

Clear the fault code memory and try to start the 
vehicle. If the fault code is regenerated and the 
vehicle does not start, renew the control unit.

If the vehicle starts, drive the vehicle for 
approximately 10 minutes.

Check if the fault code has been generated 
again. If the fault code has been regenerated, 
renew the control unit.

Fault codes

64

ã

03:04-06

Fault code D000

Fault

The voltage has been above 4.79 V (above 
25.9 bar absolute pressure), i.e. the fuel supply 
pressure was above its upper limit.

Cause

The voltage between the control unit pins 9 and 
10 in connector B2 is too high, or there is a 
fault with the voltage supply to sensor group 1 
(pin 2 in connector A1 or pin 2 in connector 
A9).

Remarks

If the voltage is outside the permitted range, the 
control unit uses a pre-programmed value 
(21,4 bar absolute pressure).

Engine torque is limited by approximately 30% 
as long as the fault is active.

If a fault is indicated on the oil pressure sensor 
at the same time, it is probably the shared 
voltage supply which is faulty.

Action

Check the signal from the fuel supply pressure 
sensor.

Check for any visible faults on the sensor and 
the wiring.

Clean the connectors.

Then, erase the fault code memory and check 
whether the fault code is generated again.

Fault codes

03:04-06

ã

65

Fault code D001

Fault

The voltage has been below 0.147 V (below -
2.1 bar absolute pressure), i.e. the fuel supply 
pressure was below its lower limit.

Engine torque is limited by approximately 30% 
as long as the fault is active.

Cause

The voltage between the control unit pins 9 and 
10 in connector B2 is too low, or there is a fault 
with the voltage supply to sensor group 1 (pin 2 
in connector A1 or pin 2 in connector A9).

Remarks

If the voltage is outside the permitted range, the 
control unit uses a pre-programmed value 
(21,4 bar absolute pressure).

If the oil pressure sensor value is incorrect at 
the same time, it is probably the shared voltage 
supply for the sensors which is faulty.

Action

Check the signal from the fuel supply pressure 
sensor.

Check for any visible faults on the sensor and 
the wiring.

Clean the connectors.

Then, erase the fault code memory and check 
whether the fault code is generated again.

Fault codes