Allante V8-273 4.5L (1991)
Wheel Speed Sensor: Testing and Inspection
PURPOSE OF TEST
The wheel speed sensor output test measures the relative signal strength of the front and rear wheel speed sensors. Signal strength is measured by reading
the WSS OUTPUT meter while spinning the selected wheel. In order to measure output consistently, output should be read from the meter only when the
SPEED RANGE indicator is on and not flickering.
HOW TO PERFORM TEST
The test procedure for performing the Wheel Speed Sensor Output test is described below and is summarized in the above illustration.
1. Ignition must be on when performing this and all other tests with the J 36210 tester.
2. Raise car on a frame contact hoist so that the wheel to be tested is off of the ground. Install the J 36210 tester and J 36210-90 adapter; turn ignition
on. The READY Light Emitting Diode (LED) must be ON.
3. Select WHEEL SPEED SENSOR test mode on the test selector buttons.
4. Specify wheel to be tested with the SELECT switch.
5. Have an assistant spin the selected wheel until the SPEED RANGE indicator (red) remains on without flickering. The wheel should be turned at a
constant speed.
6. Read wheel speed sensor output on the WSS OUTPUT meter. As the wheel is turned, watch the meter needle and note any excessive bounce or
flutter which would indicate variations in signal strength.
POSSIBLE RESULTS
Normal Operation
As the wheel is spun, the needle should remain steady at a relatively constant value. Acceptable output ranges are included in the Diagnostic Trouble
Trees.
Low Output
A low output condition is encountered when the needle remains steady at a value less than the acceptable minimums specified in the diagnostic
information
Excessive Needle Bounce
