LL5 Recheck Front Left Speed Sensor Output

LL5 RECHECK THE LEFT FRONT SPEED SENSOR OUTPUT

- Spin the left front wheel and maintain a constant speed of 60 rpm (1 revolution per second).

- set the meter to the frequency counter (Hz) setting. Measure and record the frequency between the two pins of the sensor component connector.

NOTE: Measurements of BOTH the frequency and the voltage output must be taken. The actual speed the wheels are turning is not important - the result of voltage output divided by the frequency will not change with wheel speed. However, it is crucial that both the frequency measurement and the voltage measurement be taken at the same wheel speed.

- Change the meter to the A/C mV setting. Measure and record the voltage output between the two pins of the speed sensor component connector.

- Determine the sensor output in mV/Hz:
Output = A/C voltage/Frequency

Is the sensor output greater than 5.0 mV/Hz?

> Yes
Output is now OK. Concern is most likely resolved. A drive test is recommended to verify the sensor output is OK for customer driving conditions.

> No
Verify the tone ring is pressed straight and fully onto the rotor hub. Correct as needed. Repeat Pinpoint Test LL5. LL5 Recheck Front Left Speed Sensor Output

If no resolution, replace the speed sensor. Do not leave this test until the output is OK.