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Fault codes and their meaning
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9 Fault codes and their meaning
On the pages below you will fi nd explanations of the system messages displayed on your device. Please note that the
meanings of the stored messages may vary depending on the braking system and generation.
Towing vehicle and bus ABS
SPN Aff ected component
1 Wheel sensor front axle left (A1L)
2 Wheel sensor front axle right (A1R)
3 Wheel sensor drive axle left (A2L)
4 Wheel sensor drive axle right (A2R)
5 Wheel sensor additional axle left (A3L)
6 Wheel sensor additional axle right (A3R)
7 Pressure modulator front axle left (A1L)
8 Pressure modulator front axle right (A1R)
9 Pressure modulator drive axle left (A2L)
10 Pressure modulator drive axle right (A2R)
11 Pressure modulator additional axle left (A3L)
12 Pressure modulator additional axle right (A3R)
13 Relay, endurance brake deactivation
14 Power supply axles 1+2 or supply for diff . valve or ground 2
15 Power supply axle 3,or ground line diff . valve, or AUX
16 Pressure sensor
18 3/2 solenoid valve rear axle(s)
19 Diff erential lock or 3/2 solenoid valve front axle(s) or power supply for ESC module
20 Prop. valve or centre diff erential lock
21 Electric engine interface
22 Speed signal input
23 ABS warning lamp or warning lamp relay
55 Brake light switch 1 (SPN: 1045 - Brake Light Switch 1)
79 Tire pressure monitoring
81 Trailer warning lamp
88 VDC, ESC data connection / ESC module
89 Data connection SAS (steering-wheel angle sensor)
94 Hill Start Aid system
102 Status diff erential lock (transfer box)
151 Status diff erential lock (transfer box diff erential lock)
231 SAE J1939 vehicle CAN data connection
248 SAE J1939 port
249 SAE J1922 port
251 Supply voltage
253 Calibration memory / parameter setting
254 ECU / System component
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