Двигатели Scania четвёртой серии. Руководство — часть 146

22

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03:04-06

Fault code 1202

Fault

Open circuit in the signal from engine speed
sensor 2.

Cause

The signal from engine speed sensor 2 has
indicated an implausible engine speed increase
during the time the control unit waited for the
space in the pulse pattern to pass. If the fault
code for no signal, fault code 1107, has been
generated at the same time, then the signal
must have been absent for several engine
rotations, otherwise the fault is due to a
temporary disturbance.

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

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.

If both engine speed sensors are faulty the
engine will shut down.

Action

Check the engine speed sensors, connectors
and wiring.

Fault codes

03:04-06

ã

23

Fault code 1203

Fault

Disturbance of the signal from engine speed
sensor 2.

Cause

The signal from engine speed sensor 2 has
indicated an implausible engine speed increase
during the time the control unit waited for the
space in the pulse pattern to pass. If the fault
code for no signal, fault code 1107, has been
generated at the same time, then the signal
must have been absent for several engine
rotations, otherwise the fault is due to a
temporary disturbance.

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

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.

If both engine speed sensors are faulty the
engine will shut down.

Action

Check the engine speed sensors, connectors
and wiring.

Fault codes

24

ã

03:04-06

Fault code 1204

Fault

The signal from engine speed sensor 2 is faulty.

Cause

The signal from engine speed sensor 2 has
indicated an implausible engine speed increase
between two subsequent pulses. If the fault
code for no signal, fault code 1107, has been
generated at the same time, then the signal
must have been absent for several engine
rotations, otherwise the fault is due to a
temporary disturbance.

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

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.

If both engine speed sensors are faulty the
engine will shut down.

Action

Check the engine speed sensors, connectors
and wiring.

Fault codes

03:04-06

ã

25

Fault code 1205

Fault

Open circuit in the signal from engine speed
sensor 2.

Cause

The signal from engine speed sensor 2 has
indicated an implausible engine speed decrease
between two subsequent pulses. If the fault
code for no signal, fault code 1107, has been
generated at the same time, then the signal
must have been absent for several engine
rotations, otherwise the fault is due to a
temporary disturbance.

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

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.

If both engine speed sensors are faulty the
engine will shut down.

Action

Check the engine speed sensors, connectors
and wiring.

Fault codes