DAF CF65, CF75, CF85 Series . Manual - part 63

 

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DAF CF65, CF75, CF85 Series . Manual - part 63

 

 

©

1-3

ECS-DC3 fault codes

ECS-DC3

DAVIE XD diagnostics manual 

17

100 - 1

In the case of engine oil pressure and 
temperature sensor (F647):
Engine oil pressure signal on pin A33 of the ECU 
is too low due to:
-

incorrect supply voltage on engine oil 
pressure and temperature sensor

-

too little engine oil in the oil sump

-

wrong/faulty engine oil pressure and 
temperature sensor

-

high engine load with low engine speeds; if 
this is the case the oil pressure may fall 
below the threshold value of the engine 
protection system if the engine is in poor 
mechanical condition

Limitation of maximum engine torque and 
maximum engine speed.

In the case of control switch for engine oil 
pressure (F011):
Engine oil pressure signal on pin A15 of the ECU 
is too high (engine oil pressure is low) due to:
-

faulty control switch for engine oil pressure

-

short circuit between pin A09 and pin A15 of 
the ECU

-

short circuit to supply on pin A15 of the ECU

-

too little engine oil in the oil sump

Limitation of maximum engine torque and 
maximum engine speed.

100 - 3

Voltage on signal pin A33 of the ECU for the 
engine oil pressure and temperature sensor 
(F647) is higher than expected due to:
-

faulty engine oil pressure and temperature 
sensor

-

short circuit to supply on pin 33 of the ECU

-

interruption on pin A19 of the ECU

-

short circuit between pin A09 and pin A33 of 
the ECU

-

wrong/faulty engine oil pressure and 
temperature sensor

The ECU continues its calculations with a default 
replacement value for the lubricating oil pressure.

Fault code

Fault code description with possible cause

Symptom

ECS-DC3

1-4

©

ECS-DC3 fault codes

17

DAVIE XD diagnostics manual

100 - 4

In the case of engine oil pressure and 
temperature sensor (F647):
Low voltage on signal pin A33 of the ECU for the 
engine oil pressure and temperature sensor due 
to:
-

faulty engine oil pressure and temperature 
sensor

-

interruption on pin A09 and/or pin A33 of the 
ECU

-

short circuit to earth on pin A09 and/or pin 
A33 of the ECU

-

short circuit between pin A09 and pin A19 of 
the ECU

-

short circuit between pin A33 and pin A19 of 
the ECU

-

wrong/faulty engine oil pressure and 
temperature sensor (F647)

The ECU continues its calculations with a default 
replacement value for the lubricating oil pressure.

In the case of control switch for engine oil 
pressure (F011):
Voltage on signal pin A15 of the ECU for control 
switch for engine oil pressure is low (engine oil 
pressure is high) while the engine is not running, 
due to:
-

faulty control switch for engine oil pressure

-

incorrect supply voltage on control switch for 
engine oil pressure (F011)

-

interruption on pin A09 and/or A15 of the 
ECU

-

short circuit to earth on pin A09 and/or pin 
A15 of the ECU

No noticeable system limitation in ECS-DC3.

100 - 18

In the case of engine oil pressure and 
temperature sensor (F647):
Engine oil pressure signal on pin A33 of the ECU 
is below the threshold value of the engine 
protection system due to:
-

incorrect supply voltage on engine oil 
pressure and temperature sensor

-

high engine load with low engine speeds; if 
this is the case the oil pressure may fall 
below the threshold value of the engine 
protection system if the engine is in poor 
mechanical condition

-

too little engine oil in the oil sump

Limitation of maximum engine output and 
maximum engine speed.

In the case of control switch for engine oil 
pressure (F011):
Engine oil pressure signal on pin A15 of the ECU 
is too high (engine oil pressure is low) due to:
-

faulty control switch for engine oil pressure

-

short circuit between pin A09 and pin A15 of 
the ECU

-

short circuit to supply on pin A15 of the ECU

-

too little engine oil in the oil sump

Limitation of maximum engine torque and 
maximum engine speed.

Fault code

Fault code description with possible cause

Symptom

©

1-5

ECS-DC3 fault codes

ECS-DC3

DAVIE XD diagnostics manual 

17

102 - 2

Boost pressure sensor signal (F649), the signal 
on pin A28 of the ECU, is high while other engine 
parameters (e.g. speed and load) indicate that it 
should be low, due to:
-

incorrect supply voltage on inlet air boost 
pressure and temperature sensor

-

interruption(s) or contact resistance(s) in the 
wiring between the inlet air boost pressure 
and temperature sensor and the ECU

-

oil in intercooler and/or defective 
turbocompressor oil seals

Reduced engine output.

102 - 3

Voltage on pin A28 of the ECU for boost pressure 
sensor (F649) is too high due to:
-

incorrect supply voltage on inlet air boost 
pressure and temperature sensor

-

short circuit to supply on pin A28 of the ECU

-

interruption on pin A21 of the ECU

-

short circuit between pin A10 and pin A28 of 
the ECU

-

incorrectly installed turbocompressor

Reduced engine output.

102 - 4

Voltage on signal pin A28 of the ECU for boost 
pressure sensor (F649) is too low due to:
-

incorrect supply voltage on inlet air boost 
pressure and temperature sensor

-

interruption on pin A10 and/or A28 of the 
ECU

-

short circuit to earth on pin A10 and/or A28 
of the ECU

-

short circuit between pin A10 and pin A21 of 
the ECU

-

short circuit between pin A28 and pin A21 of 
the ECU

-

incorrectly installed turbocompressor

Possibly reduced engine output.

105 - 0

Inlet air temperature signal, the signal on pin A29 
of the ECU, indicates that the inlet air 
temperature is above the threshold value of the 
engine protection system due to:
-

contaminated intercooler

-

wrong/faulty inlet air boost pressure and 
temperature sensor (F649)

Limitation of maximum engine output and 
maximum engine speed.

105 - 3

Voltage on pin A29 of the ECU for inlet air 
temperature is too high due to:
-

wrong/faulty inlet air boost pressure and 
temperature sensor (F649)

-

interruption in wiring on pin A21 and/or pin 
A29 of the ECU

-

short circuit between pin A10 and pin A29 of 
the ECU

The ECU continues its calculations with a default 
replacement value for the inlet air temperature.

105 - 4

Low voltage or short circuit to earth on signal pin 
A29 of the ECU for inlet air temperature due to:
-

wrong/faulty inlet air boost pressure and 
temperature sensor (F649)

-

short circuit to earth on pin A29 of the ECU

-

short circuit between pins A21 and A29 of 
the ECU

ECU switches to default replacement value.

Fault code

Fault code description with possible cause

Symptom

ECS-DC3

1-6

©

ECS-DC3 fault codes

17

DAVIE XD diagnostics manual

105 - 16

Inlet air temperature value, the signal on pin A29 
of the ECU, is above the threshold value of the 
engine protection system due to:
-

contaminated intercooler

-

wrong/faulty inlet air boost pressure and 
temperature sensor (F649)

Limitation of maximum engine torque and 
maximum engine speed.

108 - 11

Incorrect atmospheric air pressure sensor signal 
due to:
-

internal fault in ECU (D903); the 
atmospheric air pressure sensor is in the 
ECU

Blacker exhaust smoke. Limitation of maximum 
engine torque and maximum engine speed. 

110 - 0

Coolant temperature signal, the signal on pin A36 
of the ECU, is above the threshold value of the 
engine protection system due to:
-

fouled radiator

-

faulty thermostat

Possible limitation of maximum engine torque 
and maximum engine speed.

110 - 3

Voltage on pin A36 of the ECU for engine coolant 
temperature sensor (F566) is too high due to:
-

faulty engine coolant temperature sensor

-

interruption in wiring of pin A18 and/or A36 
of the ECU

Longer start time before engine fires.
No temperature indication on coolant 
temperature gauge on DIP.

110 - 4

Voltage on signal pin A36 of the ECU for engine 
coolant temperature sensor (F566) is too low due 
to:
-

faulty engine coolant temperature sensor

-

short circuit to earth on pin A36 of the ECU

-

short circuit between pin A36 and pin A18 of 
the ECU

Longer start time before engine fires.
No temperature indication on coolant 
temperature gauge on DIP.

110 - 16

Engine coolant temperature signal (F566), via pin 
A36 of the ECU, is way above the threshold value 
of the engine protection system due to:
-

faulty engine coolant temperature sensor

-

fouled radiator

-

faulty thermostat

Limitation of maximum engine output and 
maximum engine speed.

157 - 3

Voltage on signal pin A27 of the ECU for fuel rail 
pressure sensor (F648) is too high due to:
-

faulty rail pressure sensor

-

short circuit to supply on pin A27 of the ECU

-

interruption on pin 20 of the ECU

-

short circuit between pin A12 and pin A27 of 
the ECU

Limitation of maximum engine output and 
maximum engine speed. Loud combustion 
knocking.

157 - 4

Low voltage or short circuit to earth on signal pin 
A27 of the ECU for fuel rail pressure sensor 
(F648) due to:
-

faulty rail pressure sensor

-

interruption on pin A12 and/or A27 of the 
ECU

-

short circuit to earth on pin A12 and/or A27 
of the ECU

-

short circuit between pin A12 and pin A20 of 
the ECU

-

short circuit between pin A27 and pin A20 of 
the ECU

Limitation of maximum engine output and 
maximum engine speed. Loud combustion 
knocking.

Fault code

Fault code description with possible cause

Symptom

 

 

 

 

 

 

 

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