Двигатели Scania четвёртой серии. Руководство - часть 151

42

ã

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