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) |