Двигатели Scania четвёртой серии. Руководство - часть 148

30

ã

03:04-06

Fault code 2100

Fault

The voltage has been above 4.90 V (below - 
40°C), i.e. the charge air temperature was 
below its lower limit.

Cause

The voltage between pin 3 and 4 in connector 
A10 is too high.

Remarks

If the voltage is outside the permitted range, the 
control unit uses a pre-programmed 
temperature value (40°C).

As long as the fault is present, the engine 
responds more slowly than normal to throttle 
actuation in cold conditions. This is because 
the smoke limiter is not operating correctly.

Action

Check the signal from the charge air 
temperature sensor.

Check that the coolant and charge air are about 
the same temperature when the engine is cold.

Measure the resistance of the charge air 
temperature sensor.

Check any visible faults on the charge air 
temperature 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

31

Fault code 2101

Fault

The voltage has been below 0.44 V (above 
130°C), i.e. the charge air temperature was 
above its upper limit.

Cause

The voltage between pin 3 and 4 in connector 
A10 is too low.

Remarks

If the voltage is outside the permitted range, the 
control unit uses a pre-programmed 
temperature value (40°C).

As long as the fault is present, the engine 
responds more slowly than normal to throttle 
actuation in cold conditions. This is because 
the smoke limiter is not operating correctly.

Action

Check the signal from the charge air 
temperature sensor.

Check that the coolant and charge air are about 
the same temperature when the engine is cold.

Measure the resistance of the charge air 
temperature sensor.

Check any visible faults on the charge air 
temperature sensor, connectors and wiring.

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

Fault codes

32

ã

03:04-06

Fault code 2102

Fault

Internal fault in the control unit.

Cause

The control unit could not process (convert) the 
signal from the charged air temperature sensor.

Remarks

If the fault arises, the control unit uses a pre-
programmed temperature value (40°C).

As long as the fault is present, the engine 
responds more slowly than normal to throttle 
actuation in cold conditions. This is because 
the smoke limiter is not operating correctly.

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

03:04-06

ã

33

Fault code 2200

Fault

The voltage has been above 4.66 V (greater 
than 4.0 bar absolute pressure), i.e. above the 
upper limit for charge air pressure.

Cause

The voltage between pin 2 and 3 connector 
A10 is too high.

Remarks

If the voltage is outside the permitted range, the 
control unit uses a pre-programmed pressure 
value (approximately 1.7 bar absolute 
pressure).

The charge pressure sensor detects the absolute 
pressure in the intake manifold (the barometric 
pressure plus the positive pressure provided by 
the turbo).

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

In addition, the engine responds more slowly 
than normal to throttle actuation. This is 
because the smoke limiter is not operating 
correctly.

Action

Check the signal from the charge air pressure 
sensor.

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

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

Fault codes