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Home >> Acura >> 1995 >> Integra GS-R, 4D Sedan >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock >> Circuit Tests >> Code 4-2: Left Front Wheel Speed Sensor
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Code 4-2: Left Front Wheel Speed Sensor

  1. Disconnect left front wheel speed sensor 2-pin connector. Measure resistance between speed sensor 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/Blue wire terminal of speed sensor connector and ground. If continuity exists, replace sensor. If continuity does not exist, disconnect ABS control unit 22-pin connector. Check continuity between Green/Blue wire (Green/Orange wire on hatchback) terminal of ABS control unit 22-pin connector and ground.
  3. If continuity exists, Green/Blue wire (Green/Orange wire on hatchback) between ABS control unit and speed sensor is shorted to ground. If continuity does not exist, check continuity between Brown wire (Light Green/Black wire on hatchback) terminal of ABS control unit 22-pin connector and ground.
  4. If continuity exists, Brown wire (Light Green/Black wire on hatch back) between ABS control unit and speed sensor is shorted to ground. If continuity does not exist, reconnect speed sensor 2-pin connector. Measure resistance between Brown wire (Light Green/Black wire on hatchback) and Green/Blue wire (Green/Orange wire on hatchback) terminals of ABS 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/Blue wire (Green/Orange wire on hatchback) terminal of ABS control unit 22-pin connector and ground. Disconnect left front speed sensor 2-pin connector.
  6. Check continuity between speed sensor harness connector Green/Blue wire (Green/Orange wire on hatchback) terminal and ground. If continuity exists, repair open Brown wire (Light Green/Black wire on hatch back) between ABS control unit and speed sensor. If continuity does not exist, repair open Green/Blue wire (Green/Orange wire on hatchback) between ABS control unit and speed sensor.
  7. Check left 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.
  8. Connect ABS tester to inspection 6-pin connector. See Figure . Start engine. Turn mode selector on ABS tester to mode 4. Firmly depress and hold brake pedal down. Push START TEST switch.
  9. Have assistant manually rotate left front wheel. If wheel cannot be rotated, replace modulator. If wheels can be rotated, problem is intermittent. Test drive vehicle. If symptom reappears, replace ABS control unit.
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