DAF 95XF. Manual - part 195

©

 200438

1-3

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

©

 200438

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

©

 200438

2-1

System inspection with DAVIE XD

AIRTRONIC (ACH-EA)

DAVIE XD diagnostics manual 

9

2. SYSTEM INSPECTION WITH DAVIE XD

2.1 GENERAL

Communication between DAVIE XD and the cab 

heater can only be established if the cab heater is 

switched on.

AIRTRONIC (ACH-EA)

2-2

©

 200438

System inspection with DAVIE XD

9

DAVIE XD diagnostics manual