Двигатели Scania четвёртой серии. Руководство - часть 147

 

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Двигатели Scania четвёртой серии. Руководство - часть 147

 

 

26

ã

03:04-06

Fault code 1206

Fault

The signal from engine speed sensor 2 has been 
faulty from the beginning.

Cause

The control unit has not been able to locate a 
plausible signal from engine speed sensor 2.

This fault code can be generated when starting 
in extreme cold or when starting with a poor 
battery

Remarks

The engine will not start if the fault is active on 
both engine speed sensors.

Action

Check the engine speed sensors, connectors 
and wiring.

Fault code 1207

Fault

The signal from engine speed sensor 2 is 
missing.

Cause

The signal from the engine speed sensor has 
been missing for some time.

Remarks

If one of the engine speed sensors is faulty the 
maximum torque is reduced by approximately 
30% (as long as the fault is active) and the high 
idling speed is reduced.

Action

Check the engine speed sensors, connectors 
and wiring.

Fault codes

03:04-06

ã

27

Fault code 2000

Fault

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

Cause

The voltage between pin 1 and 2 in connector 
A7 is too high.

Remarks

If the voltage is outside the permitted range, the 
control unit uses a pre-programmed 
temperature value (60°C).

The idle speed cannot be adjusted as long as 
the fault is active.

A cold engine results in poor starting and 
uneven idle speed.

Action

Check the signal from the coolant temperature 
sensor.

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

Measure the resistance of the coolant 
temperature sensor.

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

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

Fault codes

28

ã

03:04-06

Fault code 2001

Fault

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

Cause

The voltage between pin 1 and 2 in connector 
A7 is too low.

Remarks

If the voltage is outside the permitted range, the 
control unit uses a pre-programmed 
temperature value (60°C).

The idle speed cannot be adjusted as long as 
the fault is active.

A cold engine results in poor starting and 
uneven idle speed.

Action

Check the signal from the coolant temperature 
sensor.

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

Measure the resistance of the coolant 
temperature sensor.

Check any visible faults on the coolant 
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

29

Fault code 2002

Fault

Internal fault in the control unit.

Cause

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

Remarks

If the fault arises, the control unit uses a pre-
programmed temperature value (60°C).

The idle speed cannot be adjusted as long as 
the fault is active.

A cold engine results in poor starting and 
uneven idle speed.

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

 

 

 

 

 

 

 

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