Jonn recently inspected an ABS fault on our 1994 Toyota Land Cruiser, beginning with a visual check of all wheel speed sensors to ensure they were properly connected. He then disconnected the front sensors, measured their resistance, and repeated the process for the rear sensors. All sensors registered readings between 0.6 and 1k ohm, indicating they were within specification.
The vehicle was then placed on a four-post ramp, with each axle lifted in turn. A multimeter was connected to each sensor while the wheels were spun to confirm that they were registering wheel speed. This test was repeated for the rear axle, with all sensors performing as expected.
Next, Jonn obtained the ABS wiring diagram to trace the wiring and its colour codes. He followed the wiring from the rear sensors into the loom, tracking it to the rear nearside quarter multiplug. A continuity check confirmed a proper connection from the sensors to the multiplug. The loom was then traced further inside the vehicle, leading to the removal of the nearside rear trim for access. Upon inspection, Jonn found a disconnected multiplug. A continuity check between the sensors and this multiplug confirmed an intact connection.
After reconnecting the sensors and the multiplug, the vehicle was started, and the ABS light successfully went out upon ignition. The rear trim was refitted, the ABS module was reinstalled in the offside footwell along with its trims, and the spare wheel was secured back onto its carrier.
