Blink Code | Location | Type of Fault | Possible causes / Action |
00 | N/A | No faults | System fully operational. No faults detected |
01 | Sensor 1A or wiring open or short circuit | Sensor output loss | Sensor connector loose, cable damaged or sensor faulty |
02 | Sensor 1B or wiring open or short circuit |
03 | Sensor 2A or wiring open or short circuit |
04 | Sensor 2B or wiring open or short circuit |
05 | Sensor 3A or wiring open or short circuit |
06 | Sensor 3B or wiring open or short circuit |
07 | System O.K. but all sensors have no output | Drive above 6mph (10km/h), sensor bars will appear if sensors are O.K. |
08 | Retarder relay or wiring open circuit |  |
09 | Retarder relay or wiring open circuit | |
11 | Sensor 1A, low output | Low sensor output group | Sensor worn, sensor connector loose, poorly adjusted sensor, wiring open or short circuit, short across conductors in cable |
12 | Sensor 1B, low output |
13 | Sensor 2A, low output |
14 | Sensor 2B, low output |
15 | Sensor 3A, low output |
16 | Sensor 3B, low output |
20 | Incorrect exciter ring fitted | Exciter group | Check teeth on exciter ring (i.e. 80 tooth instead of 100 tooth and vice versa) |
21 | Sensor 1A, intermittent low output | Intermittent low sensor output group | Loose or incorrectly adjusted sensor, sensor connector loose, bracket or exciter ring loose, damaged exciter ring, worn sensor cable insulation |
22 | Sensor 1B, intermittent low output |
23 | Sensor 2A, intermittent low output |
24 | Sensor 2B, intermittent low output |
25 | Sensor 3A, intermittent low output |
26 | Sensor 3B, intermittent low output |
41 | Slow recovery of sensed wheel(s): red channel | Sensed wheel slow recovery group | Slow brake release, check foundation brake for mechanical faults, dry bearings, broken springs, restricted piping. Check for kinks and blockages etc. Check for incorrectly wired sensors and modulator solenoids, incorrect piping or modulator fault |
42 | Slow recovery of sensed wheel(s): blue channel |
43 | Slow recovery of sensed wheel(s): yellow channel |
61 | Red channel, hold solenoid or wiring | Open circuit solenoid or wiring | |
62 | Blue channel, hold solenoid or wiring | |
63 | Yellow channel, hold solenoid or wiring | |
67 | Red channel, dump solenoid or wiring | |
68 | Blue channel, dump solenoid or wiring | |
69 | Yellow channel, dump solenoid or wiring | |
71 | Red channel, hold solenoid or wiring | Short circuit modulator solenoid or wiring | |
72 | Blue channel, hold solenoid or wiring | |
73 | Yellow channel, hold solenoid or wiring | |
77 | Red channel, dump solenoid or wiring | |
78 | Blue channel, dump solenoid or wiring | |
79 | Yellow channel, dump solenoid or wiring | |
80 | Poor insulation is solenoid or wiring | Solenoid wiring short to B+ or low sol. resistance | |
81 | Hold solenoid, red channel | |
82 | Hold solenoid, blue channel | |
83 | Hold solenoid, yellow channel | |
87 | Dump solenoid red channel | |
88 | Dump solenoid blue channel | |
89 | Dump solenoid yellow channel | |
90 | ECU supply voltage <18V (<9V on 12V system) when solenoid energised | Supply voltage group | |
91 | Faulty supply from ISO 7638 Pin 1 or fuse blown | |
92 | ECU supply voltage >32V (<16V on 12V system) | |
