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Home >> Acura >> 1994 >> Integra GS-R, 4D Sedan >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Trouble Codes >> Code 4-1, Right Front Wheel Speed Sensor
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Code 4-1, Right Front Wheel Speed Sensor

  1. Disconnect right front wheel speed sensor 2-pin connector. Measure resistance between speed sensor harness connector terminals. If resistance is not 600-900 ohms, replace speed sensor. If resistance is 600-900 ohms, go to next step.
  2. Check continuity between Green/Black wire terminal of sensor harness connector and ground. If continuity exists, replace sensor. If continuity does not exist, disconnect control unit 22-pin connector. Check continuity between Green/Black wire terminal of control unit 22-pin connector and ground.
  3. If continuity exists, Green/Black wire between control unit and speed sensor is shorted to ground. If continuity does not exist, check continuity between Green wire terminal of control unit 22-pin connector and ground.
  4. If continuity exists, Green wire between control unit and speed sensor is shorted to ground. If continuity does not exist, reconnect speed sensor 2-pin connector. Measure resistance between Green wire and Green/Black wire terminals of control unit 22-pin connector.
  5. If resistance is 600-900 ohms, go to step 7). If resistance is not 600-900 ohms, connect jumper wire between Green/Black wire terminal of control unit 22-pin connector and ground. Disconnect right front speed sensor 2-pin connector.
  6. Check continuity between speed sensor Green/Black wire terminal and ground. If continuity exists, repair open Green wire between control unit and speed sensor. If continuity does not exist, repair open Green/Black wire between control unit and speed sensor.
  7. Check right front speed sensor air gap and correct if necessary. See WHEEL SENSOR AIR GAP SPECIFICATIONS table under REMOVAL & INSTALLATION. If gap is okay, go to next step if ABS tester is available, or step 10) if ABS tester is not available.
  8. Connect ABS tester to inspection 6-pin connector. See Figure . Start engine. Turn mode selector on ABS tester to mode 5. Firmly depress and hold brake pedal down. Push START TEST switch.
  9. Have assistant manually rotate right front wheel. If wheel cannot be rotated, replace modulator. If wheels can be rotated, problem is intermittent. Test drive vehicle. If symptom reappears, replace control unit.
  10. Disconnect modulator 14-pin connector. Connect battery positive terminal to Red/Black wire and Yellow/Black wire terminals of modulator 14-pin connector. Connect battery negative terminal and an on-off switch to White/Black wire and Green/Black wire terminals of 14-pin connector.
  11. Firmly depress brake pedal, and momentarily turn on switch to apply ABS function to right front wheel. Have assistant manually rotate right front wheel. If wheel cannot be rotated, replace modulator. If wheel can be rotated, problem is intermittent. Test drive vehicle. If symptom reappears, replace control unit.
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