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Home >> Jeep >> 1993 >> Wrangler Sahara, Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Test 12A >> Left Rear Sensor
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Left Rear Sensor

  1. Inspect left rear wheel speed sensor. If speed sensor is damaged, contaminated or loose, repair or replace speed sensor as necessary. Perform VERIFICATION TEST VER-1A. If speed sensor is okay, inspect left rear tone (pulse) ring for damaged teeth or excessive runout. Runout should not exceed .003" (.08 mm). Repair or replace tone ring as necessary. Perform VERIFICATION TEST VER-1A.
  2. If tone ring is okay, using a feeler gauge, check left rear wheel sensor-to-tone ring clearance. If clearance is not .036-.050" (.91-1.27 mm), repair as necessary. If clearance is .036-.050" (.91-1.27 mm), inspect left rear wheel speed sensor inspect left front wheel speed sensor wiring harness for damage.
  3. Repair or replace wiring as necessary. If wiring harness is okay, disconnect and inspect left rear wheel speed sensor connector. Repair connector as necessary. Using an external ohmmeter, check resistance between left rear wheel speed sensor connector terminals.
  4. If resistance is not 900-1300 ohms, replace wheel speed sensor. Perform VERIFICATION TEST VER-1A. If resistance is 900-1300 ohms, replace CAB. Perform VERIFICATION TEST VER-1A.
NOTE: If excessive axle deflection occurs on extremely bumpy surfaces or during off road use, it is possible for a wheel speed sensor to set a code.
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