DAF LF45IV, LF55IV, CF65IV, CF75 IV, CF85 IV, XF95, XF105 – Comments on fault codes in HYDRONIC 10

Fault codes DFF LF45IV, LF55IV, CF65IV, CF75 IV, CF85 IV, XF95, XF105 – TROUBLESHOOTING COMMENTS for HYDRONIC 10 (ACH-EW) with electronic unit D901

The following explains the fault codes for the HYDRONIC 10 (ACH-EW) system with the D901 electronic unit. This electronic unit can be recognized by the built-in cable with a connector.

Note

Applicable to DAF XF95 with chassis numbers up to 0E621373, issued before July 2003.

Code

malfunction

Fault code description and possible causes Symptoms
0-0 Internal communication failures in the electronic control unit (D901) due to the electronic control unit -Cabin heater does not run or runs erratically
0-1 Internal communication failures in the electronic control unit (D901) due to the electronic control unit -Cabin heater does not run or runs erratically
1-0 Launch failure ACH-EW, the flame is not detected during startup. Flame sensor value remains below 80° c voltage at pins 10 and 12 18-pin connector at the bottom of the electronic

control unit below the 2.23 in:

-The absence or insufficient fuel supply

-Insufficient air supply

-A clogged exhaust

-Pollution or damage the igniter

-Too high or too low voltage spark

-Cabin heater does not start. After two failed launches of the cabin heater shuts down and throws a fault code.
1-4 Too many runs without flame detection:

-The absence or insufficient fuel supply

-Insufficient air supply

-A clogged exhaust

-Pollution or damage the igniter

-Too high or too low voltage spark

-Cabin heater shuts down after 10 unsuccessful launches (20 launch attempts) and the electronic control unit is blocked
2-0 Flame goes out often during work:

-The absence or insufficient fuel supply

-Insufficient air supply

-Low or high voltage

-Excessively high temperature flame sensor

-Excessively high temperature sensor overheating

-Faulty combustion device

-Pollution or damage the igniter

-Clogging or contamination of exhaust

-Cabin heater does not work or works, highlighting the lack of heat
3-1 Too high voltage (above 30 in over 20 seconds) on the findings of the A5 and Jsb electronic control unit (D901) due to excessive voltage generator/accumulator

battery

-CAB heater malfunction
3-2 Too low voltage (below 20 in over 20 seconds) on the findings of the A5 and Jsb electronic control unit (D901) due to insufficient supply, such as during engine start -CAB heater malfunction
4-0 Alarm flame when turned on. Flame sensor value above 80° c, despite the four-minute ventilation cold air; voltage at pins 10 and 12 18-pin connector at the bottom of the electronic control unit above 2.23 in flame sensor malfunction as a result. -Cabin heater won’t start
5-1 Flame sensor short circuit at pins 10 and 12 18-pin connector at the bottom of the electronic control unit -Cabin heater does not run or runs erratically
5-2 Flame sensor open circuit on the findings of the 10 and 12 18-pin connector at the bottom of the electronic control unit -Cabin heater does not run or runs erratically
6-1 A short circuit in the engine coolant temperature sensor

on the findings of the 9 and 11 18-pin connector at the bottom of the electronic control unit

-Cabin heater does not run or runs erratically
6-2 Open circuit coolant temperature sensor on the findings

9 and 11 18-pin connector at the bottom of the electronic control unit

-Cabin heater does not run or runs erratically
7-1 Shorted fuel pump module with level sensor (122) on the findings of the A1 and A2 electronic control unit -Cabin heater does not run or runs erratically
7-2 Open circuit fuel pump module with level sensor (122) on the findings of the A1 and A2 electronic control unit -Cabin heater does not run or runs erratically
8-3 Deviation speed combustion devices:

-Faulty combustion devices

-Faulty electronic unit (D901)

-Cabin heater during the work refuses delay in 60 seconds
9-1 Shorted filament on the findings of the 3 and 4 18-pin connector at the bottom of the electronic control unit -Cabin heater won’t start
9-2 Open circuit of filament on the findings of the 3 and 4 18-pin connector at the bottom of the electronic control unit -Cabin heater won’t start
10-0 Too rapid growth of coolant temperature:

-Poor fluid flow

-Lack of coolant

-Use intardera

-Cabin heater refuse during operation
10-4 Included safety function ACH-EW as a result of too many overheats -Cabin heater not working. The electronic control unit is locked after three failed launches
11-1 Short circuit the coolant circulation pump on the findings of 6 and 7 18-pin connector at the bottom of the electronic control unit -Cabin heater does not run or runs erratically
11-2 Open circuit the coolant circulation pump on the findings

6 and 7 18-pin connector at the bottom of the electronic control unit

-Cabin heater does not run or runs erratically
13-1 Short circuit sensor overheating on the findings of 5 and 8 18-pin connector at the bottom of the electronic control unit -Cabin heater does not run or runs erratically
13-2 Open circuit sensor overheating on the findings of 5 and 8 18-pin connector at the bottom of the electronic control unit -Cabin heater does not run or runs erratically
13-3 Too much difference between the values in the sensor overheating and coolant temperature sensor:

-Poor fluid flow

-Lack of coolant

-Use intardera

-Cabin heater does not run or runs erratically
15-1 Short circuit in wiring “signal at the output” ACHEW A9 ALS-electronic control unit S (D911) -No detection alarm systems (ALS-S)