DAF 95XF. Manual — part 216

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200438

1-1

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

1-2

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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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200438

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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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200438

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