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

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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)