GM 3123 Manuel Du Propriétaire page 38

3
Code Service Code Definition
55 4 Wheel Anti-Lock (4WAL) control unit fault
56 4 Wheel Anti-Lock (4WAL) control unit fault
57 4 Wheel Anti-Lock (4WAL) control unit fault
58 4 Wheel Anti-Lock (4WAL) control unit fault
59 4 Wheel Anti-Lock (4WAL) control unit fault
60 4 Wheel Anti-Lock (4WAL) control unit fault
61 4 Wheel Anti-Lock (4WAL) control unit fault
62 4 Wheel Anti-Lock (4WAL) control unit fault
63 4 Wheel Anti-Lock (4WAL) control unit fault
64 4 Wheel Anti-Lock (4WAL) control unit fault
65 4 Wheel Anti-Lock (4WAL) control unit fault
66 4 Wheel Anti-Lock (4WAL) control unit fault
67 Open motor circuit or shorted ECU output
68 Locked motor or shorted motor circuit
71 4 Wheel Anti-Lock (4WAL) control unit fault
72 4 Wheel Anti-Lock (4WAL) control unit fault
73 4 Wheel Anti-Lock (4WAL) control unit fault
74 4 Wheel Anti-Lock (4WAL) control unit fault
81 Brake switch circuit shorted or open
85 Open anti-lock warning lamp
86 Shorted anti-lock warning lamp
88 Shorted brake warning lamp
3.5.4 Bosch 2S System Service Codes
Code Service Code Definition
12 Diagnostic system operational
21 Right front speed sensor fault
22 Right front toothed wheel frequency error
25 Left front speed sensor fault
26 Left front toothed wheel frequency error
31 Right rear speed sensor fault
32 Right rear toothed wheel frequency error
35 Left rear speed sensor fault
36 Left rear toothed wheel frequency error
3-13 GM