DAF 95XF. Manual - part 216

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ECS-DC3 fault codes

ECS-DC3

DAVIE XD diagnostics manual 

17

1. ECS-DC3 FAULT CODES

1.1 INTRODUCTION

If the electronic unit detects a system fault, this 

fault is usually stored in the memory of the 

electronic unit as a fault code.

Most system faults will also generate a warning.

ECS-DC3

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ECS-DC3 fault codes

17

DAVIE XD diagnostics manual

1.2 EXPLANATORY NOTES TO ECS-DC3 FAULT CODES

Fault code

Fault code description with possible cause

Symptom

84 - 2

No CAN message from VIC (D900) relating to 
vehicle speed signal present due to:
-

faulty vehicle speed sensor (F533)

-

communication problems with VIC (D900)

-

faulty MTCO (B525)

Maximum engine speed is limited to a lower 
value.
Vehicle speed limiter, engine speed control and 
cruise control cannot be activated.

91 - 3

Voltage on pin B83 of the ECU for accelerator 
pedal sensor (F671) is too high due to:
-

faulty accelerator pedal sensor

-

short circuit to supply on pin B83 of the ECU

-

interruption on pin B81 of the ECU

-

short circuit between pin B83 and pin B55 of 
the ECU

Indistinct response to accelerator pedal.
When the accelerator pedal is depressed the 
idling speed of the engine increases gradually. 

91 - 4

Voltage on pin B83 of the ECU for accelerator 
pedal sensor (F671) is too low due to:
-

faulty accelerator pedal sensor

-

interruption on pin B55 and/or pin B83 of the 
ECU

-

short circuit to earth on pin B55 and/or pin 
B83 of the ECU

-

short circuit between pin B55 and pin B81 of 
the ECU

-

short circuit between pin B83 and pin B81 of 
the ECU

Indistinct response to accelerator pedal.
When the accelerator pedal is depressed the 
idling speed of the engine increases gradually. 

94 - 0

As a result of the output signal of the fuel pump 
control solenoid valve (B334) the fuel rail 
pressure sensor (F648) pressure signal is 
considerably higher than the calculated fuel rail 
pressure due to:
-

faulty/jammed fuel pump control solenoid 
valve (B334)

-

faulty rail pressure sensor

Possibly reduced engine output.

94 - 16

Fuel rail pressure sensor (F648) pressure signal 
on pin A27 of the ECU is too high for the 
calculated engine load due to:
-

faulty/jammed fuel pump control solenoid 
valve (B334)

-

faulty rail pressure sensor

Limitation of maximum engine torque and 
maximum engine speed. Possibly loud 
combustion knocking.

94 - 18

Fuel rail pressure sensor (F648) pressure signal 
on pin A27 of the ECU is too low for the calculated 
engine load due to:
-

internal/external fuel rail fuel leakage/high-
pressure line/injector lines

-

high resistance in wiring of fuel rail pressure 
sensor (F648)

Possibly reduced engine output.

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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

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ECS-DC3 fault codes

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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