Двигатели Scania четвёртой серии. Руководство - часть 150

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03:04-06

Fault code 2401

Fault

The voltage has been below 0.147 V (below 
0.2 bar relative pressure), i.e. below the lower 
limit for oil pressure.

Cause

The voltage between pin 3 and 4 in connector 
A9 is too low.

Remarks

The oil pressure gauge in the instrument panel 
indicates 2,5 bar, irrespective of engine speed.

If the voltage is outside the permitted range, the 
control unit uses a pre-programmed pressure 
value (2.5 bar relative pressure).

Action

Check the signal from the oil pressure sensor.

Check any visible faults on the oil pressure 
sensor, connectors and wiring.

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

Fault codes

03:04-06

ã

39

Fault code 2402

Fault

Internal fault in the control unit.

Cause

The control unit could not process (convert) the 
signal from the oil pressure sensor.

Remarks

The oil pressure gauge in the instrument panel 
indicates 2,5 bar, irrespective of engine speed.

If the voltage is outside the permitted range, the 
control unit uses a pre-programmed pressure 
value (2.5 bar relative pressure).

Action

Clear the fault code memory. Start the engine 
and accelerate the engine to full speed.

If the fault code is regenerated, renew the 
control unit.

Fault codes

40

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03:04-06

Fault code 2403

Fault

The control unit does not rely on the oil 
pressure sensor signal even though it is within 
the tolerances.

Cause

The voltage from the oil pressure sensor has 
been implausible when compared with other 
pressure sensors, or there has been an 
implausible pressure change in relation to the 
current operating conditions.

Remarks

The oil pressure gauge in the instrument panel 
indicates 2,5 bar, irrespective of engine speed.

If the voltage is outside the permitted range, the 
control unit uses a pre-programmed pressure 
value (2.5 bar relative pressure).

Action

Check the signal from the oil pressure sensor.

Check any visible faults on the oil pressure 
sensor, connectors and wiring.

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

Fault codes

03:04-06

ã

41

Fault code 2600

Fault

The voltage has been above 5.2 V for one of 
the sensors in sensor group 1, which includes 
the oil pressure sensor and the fuel pressure 
sensor for the front bank, cylinder 1-3.

Cause

Short circuit to battery voltage.

Remarks

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

Action

Check the signal from the oil pressure sensor 
and the fuel pressure sensor for the front bank, 
cylinder 1-3.

Check for any visible faults in the oil pressure 
sensor, the fuel pressure sensor, the connectors 
and the wiring.

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

Fault codes