Reading ABS Trouble Codes

When the engine is started, the ABS warning lamp on the instrument cluster should come on briefly and go off almost immediately. If the lamp remains on after the engine has started due to a fault, the ABS control module stores the corresponding diagnostic trouble code in the self-diagnostic memory. Codes are read using a special scan tool connected to the 16-pin diagnostic connector located under the front trim panel of the driver's door sill. If a scan tool is not available, take the vehicle to a service station to read the memory and perform the necessary corrective repairs.

The ABS trouble code identification chart is provided below.

Any corrective repair should be entrusted to qualified service specialists.

Code

Possible Source of Malfunction

11

Right front wheel sensor (open or short circuit in circuit)

12

Right front wheel sensor (electrical interference or unstable signal)

13

Left front wheel sensor (open or short circuit in circuit)

14
Left front wheel sensor (electrical interference or unstable signal)
15
Right rear wheel sensor (open or short circuit in circuit)
16
Right rear wheel sensor (electrical interference or unstable signal)
17
Left rear wheel sensor (open or short circuit in circuit)
18
Left rear wheel sensor (electrical interference or unstable signal)
21
Right front wheel sensor tone ring
22
Left front wheel sensor tone ring
23
Right rear wheel sensor tone ring
24
Left rear wheel sensor tone ring
31
Right front wheel sensor inlet solenoid valve
32
Right front wheel sensor outlet solenoid valve
33
Left front wheel sensor inlet solenoid valve
34
Left front wheel sensor outlet solenoid valve
35
Right rear wheel sensor inlet solenoid valve
36
Right rear wheel sensor outlet solenoid valve
37
Left rear wheel sensor inlet solenoid valve
38
Left rear wheel sensor outlet solenoid valve
41
Right front wheel lock
42
Left front wheel lock
43
Right rear wheel lock
44
Left rear wheel lock
51
Motor lock
52
Motor remains off
53
Motor remains on
54
Fail-safe relay
61
Excessively low ignition voltage
62
Excessively high ignition voltage
71
Tires of different diameters
81
Diagnosis of central processor and ROM/RAM units

Clearing ABS Control Module Memory
After the detected faults have been corrected, the control module memory must be cleared. A scan tool is again required to clear the memory; if one is not available, take the vehicle to a service station. For more detailed information on scan tool reading, refer to the Engine Control section.