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Home >> Isuzu >> 1996 >> Oasis LS >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Diagnosis & Testing >> Abs Function Test >> Preliminary Procedure
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Preliminary Procedure

  1. Raise and support vehicle. Ensure brakes do not drag. Turn ignition switch to ON position and ensure ABS indicator light comes on. If ABS indicator light does not come on, go to appropriate flow chart. See ABS SELF-DIAGNOSTIC FLOW CHARTS .
  2. Turn ignition switch to OFF position. Connect ABS Tester (07HAJ-SG0010B) to Orange 6-pin ABS test connector, located under glove box. Put transmission in Park (A/T) or Neutral (M/T).
  3. Start engine and release parking brake. Place mode selector to "1" position. Push START TEST button. See Fig 1. TEST IN PROGRESS light should come on. ABS indicator light should not come on when TEST IN PROGRESS light is on. If ABS indicator light comes on, confirm DTC and perform appropriate self-diagnostic flow chart. If tester lights do not illuminate, ABS tester is faulty.
    CAUTION: DO NOT move mode selector switch while TEST IN PROGRESS light is on. ABS tester could be damaged.
    NOTE: Kickback on brake pedal should occur approximately 20 seconds after START TEST button is pushed. Wheel sensors and sensor wiring harnesses are not checked by ABS tester.
    Fig 1: Identifying ABS Tester Lights & Functions
    G91H02795Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Turn mode selector to "2" position. Firmly depress brake pedal. Push START TEST button. ABS warning light should not come on while TEST IN PROGRESS light is on. Kickback should be felt on brake pedal. Have an assistant ensure controlled wheel can be rotated when there is kickback on brake pedal.
  5. If ABS indicator light comes on during test, confirm DTC and perform appropriate self-diagnostic flow chart. If ABS indicator light does not come on and controlled wheel cannot be rotated, check modulator wiring harness connectors. If connectors are okay, replace modulator.
  6. Place mode selector in "3", "4" and then "5" positions. Repeat steps 4) and 5) for each test mode. Breakdown of each test mode is as follows:

    • Mode 1

      Sends simulated driving signal (zero MPH to 113 MPH to zero MPH) of each wheel to control unit to check self-diagnostic circuit. No kickback should be felt in brake pedal.

    • Mode 2

      Sends driving signal of each wheel, and then sends lock signal of left rear wheel to control unit. Kickback should be felt in brake pedal.

    • Mode 3

      Sends driving signal of each wheel, and then sends lock signal of right rear wheel to control unit. Kickback should be felt in brake pedal.

    • Mode 4

      Sends driving signal of each wheel, and then sends lock signal of left front wheel to control unit. Kickback should be felt in brake pedal.

    • Mode 5

      Sends driving signal of each wheel, and then sends lock signal of right front wheel to control unit. Kickback should be felt in brake pedal.

    • Mode 6

      Not used on these models.
  7. If brake pedal does not kickback in Modes 2-5 as indicated and ABS indicator light does not come on, repeat function test. If test results remain unchanged, check for pressure switch stuck in ON position, clogged or stuck solenoid outlet valve or poor connections in modulator wiring harness.
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