Description

NORMAL OPERATION
With the vehicle at rest, the antilock brake control module monitors all sensors for coil integrity.

FAULT DESCRIPTION
Code is generated by the antilock brake control module's detection of an open rear axle speed sensor or an open in Circuits 523 (R/PK) or 519 (LG/BK) between the rear axle speed sensor and the antilock brake control module. If this fault is detected during the antilock brake control module's self-check after key on, the amber ABS warning lamp will come on immediately. This is generally an indication of a constant wiring or component fault. However, the code is not written to the antilock brake control module's memory until vehicle speed exceeds 6 km/h (4 mph). If the amber ABS warning lamp proves out normally and comes on later when the vehicle is driven, this is generally an indication of an intermittent wiring or component fault.






POSSIBLE CONTRIBUTING COMPONENT/VEHICLE WIRING CONCERNS
- Poor connection at rear axle speed sensor.
- Terminal damage or backout in antilock brake control module connector pins 9 or 22.
- Terminal damage or backout in rear axle speed sensor connector.
- Open or shorted rear axle speed sensor.
- Open or shorted Circuit 523 (R/PK) or 519 (LG/BK).
- Improper rear axle speed sensor cable routing leading to above.
- Defective rear axle speed sensor electrical test circuit in antilock brake control module.