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Home >> Chevrolet >> 1998 >> Tracker 2D Utility, 4WD, Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> System Tests >> Solenoid Test

Solenoid Test

  1. Turn ignition off. Connect Tech 2. Turn ignition on. Select SPECIAL FUNCTIONS, MANUAL CONTROL. Release motor for channel being tested. Select solenoid for channel being tested. With no brake pressure applied, turn solenoid ON.
  2. Depress brake pedal. It should be high and firm. If pedal goes to floor, solenoid and/or check ball is leaking.
  3. With brake pressure still applied, turn solenoid OFF. Pedal shop drop immediately. If pedal does not drop and motor is moving, solenoid is stuck on or off. To verify which solenoid is stuck, apply motor for channel being tested.
  4. If brake pedal rises, solenoid is stuck open. If pedal falls, solenoid is stuck closed. If pedal slowly drops, or rises when applying motor, physically switch the 2 solenoids. Repeat test for channel in question.
  5. If pedal continues to drop, check ball is leaking. Replace modulator unit. If test works properly, test other channel. If pedal drops or rises, replace affected solenoid. If test fails for same channel, check valve is leaking. Replace modulator unit.
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