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Home >> Jeep >> 1993 >> Wrangler Base, 2.5 P >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Test 14A >> Pedal Travel Sensor Circuit
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Pedal Travel Sensor Circuit

  1. Inspect pedal travel sensor connector. Sensor is located on right side of brake booster. If connector is disconnected and/or damaged, repair connector as necessary and perform VERIFICATION TEST VER-1A. If connector is properly connected and NOT damaged, go to next step.
  2. Turn ignition off. Disconnect and inspect CAB 55-pin connector. Repair connector as necessary. Turn ignition on. Disconnect and inspect pedal travel sensor connector. Repair connector as necessary. With DRB-II in voltmeter mode, probe Gray/Light Blue wire at sensor connector. If no voltage is present, go to next step. If voltage is present, repair Gray/Light Blue wire for a short to battery voltage. Perform VERIFICATION TEST VER-1A.
  3. Turn ignition off. With DRB-II in ohmmeter mode, probe Gray/Light Blue wire at pedal travel sensor connector. If resistance is less than 5 ohms, repair Gray/Light Blue wire for a short to ground. Perform VERIFICATION TEST VER-1A. If resistance is more than 5 ohms, go to next step.
  4. Using an external ohmmeter, measure resistance between CAB connector terminal No. 16 and pedal travel sensor connector Gray/Light Blue wire. If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open Gray/Light Blue wire to pedal travel sensor. Perform VERIFICATION TEST VER-1A.
  5. Using an external ohmmeter, measure resistance between CAB connector terminal No. 41 and pedal travel sensor connector Red/Black wire. If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open Red/Black wire to pedal travel sensor. Perform VERIFICATION TEST VER-1A.
  6. Remove pedal travel sensor from brake booster. Check if sensor plunger cap color matches color dot on booster (near sensor). If colors match, go to next step. If colors do not match, replace pedal travel sensor. Perform VERIFICATION TEST VER-1A.
  7. Using an external ohmmeter, measure resistance of pedal travel sensor while slowly depressing sensor plunger. If sensor resistance is as specified, replace CAB. See PEDAL TRAVEL SENSOR RESISTANCE table. Perform VERIFICATION TEST VER-1A. If sensor resistance is not as specified, replace pedal travel sensor. Perform VERIFICATION TEST VER-1A.
PEDAL TRAVEL SENSOR RESISTANCE

Plunger Position Ohms
Step 1 (Rest) 236-262
Step 2 414-458
Step 3 534-592
Step 4 655-725
Step 5 776-858
Step 6 980-1084
Step 7 Infinity
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