Equus 3123 - GM Code Reader (1982 - 1995) - Manual (Page 36)

3
3-11 GM
3.5.2 Kelsey-Hayes RWAL System Service Codes
Code Service Code Definition
61 Electronic Brake Control Module loop circuit
71 Left front outlet valve
72 Right front outlet valve
73 Rear outlet valve
74 Rear outlet valve
75 Left front Wheel Speed Sensor
76 Right front Wheel Speed Sensor
77 Right rear Wheel Speed Sensor
78 Left rear Wheel Speed Sensor
Code Service Code Definition
1 Rear Wheel Anti-Lock (RWAL) Electronic Control Unit
(ECU) malfunction or improper voltage
2 Open isolation valve or faulty ECU
3 Open dump valve or faulty ECU
4 Grounded anti-lock valve reset switch circuit
5 Excessive actuation of the dump valve during an anti-lock
stop
6 Erratic speed signal
7 Shorted isolation valve circuit or faulty ECU
8 Shorted dump valve circuit or faulty ECU
9 Open or grounded circuit to the vehicle speed sensor
10 Brake lamp switch circuit fault
11 Rear Wheel Anti-Lock (RWAL) Electronic Control Unit
(ECU) malfunction or improper voltage
12 Rear Wheel Anti-Lock (RWAL) Electronic Control Unit
(ECU) malfunction or improper voltage
13 Rear Wheel Anti-Lock (RWAL) Electronic Control Unit
(ECU) malfunction
14 Rear Wheel Anti-Lock (RWAL) Electronic Control Unit
(ECU) malfunction
15 Rear Wheel Anti-Lock (RWAL) Electronic Control Unit
(ECU) malfunction