Двигатели Scania четвёртой серии. Руководство — часть 151

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03:04-06

Fault code 2601

Fault

The voltage has been below 4.8 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 between the voltage supply to the
sensor and the sensor earthing point.

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

03:04-06

ã

43

Fault code 2700

Fault

The voltage has been above 5.2 V for one of
the sensors in sensor group 2, which includes
the sensor for charge air temperature and
charge air pressure, the fuel supply pressure
sensor and the fuel pressure sensor for the rear
bank, cylinder 4-6.

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 sensor for charge air
temperature and charge air pressure, the fuel
supply pressure sensor and the fuel pressure
sensor for the rear bank, cylinder 4-6.

Check for any visible faults on the sensor for
charge air temperature and charge air pressure,
the fuel supply pressure sensor, the fuel
pressure sensor, connectors and wiring.

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

Fault codes

44

ã

03:04-06

Fault code 2701

Fault

The voltage has been below 4.8 V for one of
the sensors in sensor group 2, which includes
the charge air temperature and charge air
pressure sensor, the fuel supply pressure sensor
and the fuel pressure sensor for the rear bank,
cylinder 4-6.

Cause

Short circuit between the voltage supply to the
sensor and the sensor earthing point.

Remarks

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

Action

Check the signal from the sensor for charge air
temperature and charge air pressure, the fuel
supply pressure sensor and the fuel pressure
sensor for the rear bank, cylinder 4-6.

Check for any visible faults on the sensor for
charge air temperature and charge air pressure,
the fuel supply pressure sensor, the fuel
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

45

Fault code 3003

Fault

The CAN message from the coordinator, about
the brake pedal switches and the accelerator
pedal sensor potentiometer, has indicated an
implausible value.

Cause

A CAN message from the coordinator to the
EDC control unit has indicated that there is a
fault in the signals to the brake pedal switches
and the accelerator pedal sensor potentiometer.

Remarks

The CAN communication wiring is probably
not faulty.

The coordinator has probably received signals
about the accelerator and brake pedals being in
depressed position simultaneously for more
than 20 consecutive brake applications.

The purpose of the fault code is to detect
whether the accelerator pedal fails to return as
it should, e.g. because of a faulty return spring.

Action

First check that there is 0% acceleration when
the accelerator pedal is released.

If this is the case, check that the brake signal is
inactive when the brake pedal is released.

Check the message from the coordinator about
the positions of the brake pedal switches and
the position of the accelerator pedal.

Erase the fault code memory and check
whether the fault code is generated again.

Carry out troubleshooting of the coordinator.

Check the wiring for CAN communication and
the connectors.

Do not forget to clear any fault codes in the
coordinator!

Fault codes