DAF LF45, LF55 Series. Manual - part 62

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Contents

ECS-DC3

DAVIE XD diagnostics manual 

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17 ECS-DC3

CONTENTS

Page

Date

1.

1.2

2.

2.2

3.

ECS-DC3

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Contents

17

DAVIE XD diagnostics manual

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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

1-2

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ECS-DC3 fault codes

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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.