DAF LF45, LF55 Series. Manual — part 41
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1-1
Airtronic (ACH-EA) fault codes
AIRTRONIC (ACH-EA)
DAVIE XD diagnostics manual
9
1. AIRTRONIC (ACH-EA) 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.
AIRTRONIC (ACH-EA)
1-2
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Airtronic (ACH-EA) fault codes
9
DAVIE XD diagnostics manual
1.2 EXPLANATORY NOTES TO AIRTRONIC D2/D4 (ACH-EA) FAULT CODES
Fault code
Fault code description with possible cause
Symptom
0-0
Internal fault in ECU (D871) due to:
-
defective ECU (D871)
-
insufficient battery voltage
-
Cab heater does not start or fails during
operation
0-1
Internal fault in ECU (D871) due to:
-
defective internal temperature sensor in
ECU (D871)
-
Cab heater does not start or fails during
operation
1-0
Fault when starting ACH-EA, no flame is detected
within the start time due to:
-
no or insufficient supply of fuel
-
insufficient supply of inlet air
-
clogged exhaust
-
defective flame sensor (combisensor F691)
-
defective glow filament (B168)
-
Cab heater does not start or fails during
operation
1-4
Too many failed start attempts
(activation cut-off)
-
Cab heater does not start. The cab heater
shuts down after a maximum of 255 failed
starts and the electronic unit will block.
-
Electronic unit released by erasing faults
using DAVIE XD
2-0
Flame extinguishes repeatedly during operation
due to:
-
no or insufficient supply of fuel
-
insufficient supply of inlet air
-
clogged exhaust
-
defective flame sensor (combisensor F691)
-
Cab heater fails or emits smoke and
supplies insufficient heat
3-1
Voltage (>30 V for at least 20 seconds) on pin 1
of the ECU (D871) is too high due to:
-
excessive alternator/battery voltage
-
Cab heater fails during operation
3-2
Voltage (<20 V for at least 20 seconds) on pin 1
of the ECU (D871) is too low due to:
-
insufficient alternator/battery voltage
-
interruption on pin 1 of the ECU (D871)
-
Cab heater fails during operation
4-0
Flame signalling when switching on due to:
-
defective flame sensor (combisensor F691)
-
defective ECU (D871)
-
Cab heater does not start
5-1
Short circuit to earth or short circuit to supply of
flame sensor (combisensor F691) on pins FF1
and FF2 of the ECU (D871)
-
Cab heater does not start or fails during
operation
5-2
Interruption of flame sensor (combisensor F691)
on pins FF1 and/or FF2 of the ECU (D871)
-
Cab heater does not start or fails during
operation
5-3
The flame sensor signal (combisensor F691) is
out of range
-
Cab heater does not start or fails during
operation
6-1
Short circuit to earth or short circuit to supply of
thermostat unit (E566) temperature sensor on pin
13 and/or 10 of the ECU (D871)
-
Cab heater does not start or fails during
operation
6-2
Interruption of thermostat unit (E566)
temperature sensor on pin 13 and/or 10 of the
ECU (D871)
-
Cab heater does not start or fails during
operation
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Airtronic (ACH-EA) fault codes
AIRTRONIC (ACH-EA)
DAVIE XD diagnostics manual
9
7-1
Short circuit to earth or short circuit to supply of
fuel metering pump (B122) on pin 4 and/or 9 of
the ECU (D871)
-
Cab heater does not start
Internal fault in fuel metering pump (B122)
7-2
Interruption on pin 4 and/or 9 of the ECU (D871),
fuel metering pump (B122)
-
Cab heater does not start
Internal fault in fuel metering pump (B122)
8-1
Short circuit to earth or short circuit to supply of
cab heater fan (B305) on pins BM1 and BM2 of
the ECU (D871)
-
Cab heater does not start
Internal fault in fan (B305)
8-2
Interruption of cab heater fan (B305) on pins BM1
and/or BM2 of the ECU (D871)
-
Cab heater does not start
Internal fault in fan (B305)
8-3
Cab heater fan (B305) speed deviation due to:
-
blocked vent
-
missing solenoid in electric motor
-
defective ECU (D871)
-
Cab heater fails during operation
9-1
Short circuit to earth or short circuit to supply of
glow filament (B168) on pin GS1 and/or GS2 of
the ECU (D871)
-
Cab heater does not start
9-2
Interruption of glow filament (B168) on pin GS1
and/or GS2 of the ECU (D871)
-
Cab heater does not start
10-0
Cab heater gets overheated too often due to:
-
clogged hot air pipes
-
defective overheating sensor (combisensor
F691)
-
insufficient supply of inlet air
-
Cab heater fails during operation
10-4
ACH-EA safety function switched on as a result
of:
-
too many overheatings
-
The ECU is blocked
12-1
Short circuit to earth or short circuit to supply of
thermostat unit (E566) on pin 10, 11 and/or 13 of
the ECU (D871)
-
Cab heater does not start
-
Cab heater does not switch on or off at the
desired temperature
Internal fault in thermostat unit (E566) or timer
unit (E581)
12-2
Interruption of temperature unit (F566) on pin 10
and/or 11 of the ECU (D871)
-
Cab heater does not start
-
Cab heater does not switch on or off at the
desired temperature
Internal fault in thermostat unit (E566) or timer
unit (E581)
13-1
Short circuit to earth or short circuit to supply of
overheating sensor (combisensor F691) on pins
UF1 and FF2 of the ECU (D871)
-
Cab heater does not start or fails during
operation
Fault code
Fault code description with possible cause
Symptom
AIRTRONIC (ACH-EA)
1-4
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Airtronic (ACH-EA) fault codes
9
DAVIE XD diagnostics manual
13-2
Interruption of overheating sensor (combisensor
F691) on pins UF1 and/or FF2 of the ECU (D871)
-
Cab heater does not start or fails during
operation
13-3
Combisensor (F691) value is out of measuring
range due to:
-
clogged hot air pipes
-
defective overheating sensor (combisensor
F691)
-
insufficient supply of inlet air
-
defective flame sensor (combisensor)
-
Cab heater does not start or fails during
operation
Fault code
Fault code description with possible cause
Symptom
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