Question about Mitsubishi Montero

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2001 montero anti lock light and red light are "on". pushing the brake pedal has no effect, no brake at all. no dtc code for anti lock or brake. do i need to remove 4 tires to bleed the brake sys to loosen the brake pads. after the bleed is the lights will turn off. please help.

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  • Rudy Cordova
    Rudy Cordova Aug 02, 2010

    again thank you very much

  • Rudy Cordova
    Rudy Cordova Aug 02, 2010

    WHERE IS THE SOUND COMING FROM. IS THAT FROM PUMP,MODULATOR , ABS SYS BEING BAD OR A WARNING SOUND BECAUSE THE ANTI LOCK BRAKES IS LIT OR THE RED LIGHT IS ON OR NO BRAKE WHAT SO EVER. WHAT CAUSE THE BRAKE TO LOCK OR TO TURN ON WHEN YOU JUST DRIVING 30 MPH. THE BRAKE DISSAPPEARD WHEN THE ANTI LIGHT COME ON. THANK YOU FOR YOUR HELP.

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  • Mitsubishi Master
  • 6,826 Answers

OK, anytime the anti lock and the red light go on you're looking at a pretty serious failure in the brake system.

Brake Fluid Bleeding the Brake System Conventional Brake Bleeding NOTE: Perform the following if the brake fluid level in the HBB reservoir is between the "MIN" and "MAX" lines after any brake servicing at the wheels.
NOTE: Keep the brake fluid reservoir above the MIN lever during the entire procedure. Check the level frequently and add fluid as needed.
NOTE: If a large quantity of brake fluid is drained during the bleeding procedure, the accumulator pressure will decrease abnormally. Do not bleed more than 0.11quart (0.1 liter) from each wheel at a time.
NOTE: Confirm that the pump motor stops after each air-bleeding step.

  1. Bleed the rear brake system as follows;
    1. Attach the clear hose to the right caliper.
    2. Turn the ignition switch to the "ON" position.
    3. Open bleeder valve 1/4 turn.
    4. With the bleeder valve open, pump the brake pedal 3 times and hold.
    5. Close the bleeder valve.
    6. Pump the brake pedal 3 times and hold.
    7. Open the bleeder valve 1/8 turn briefly to allow any remaining air to escape, and then close the bleeder valve.
    8. Repeat steps (F) and (G) as many times as necessary to eliminate all air in the line.
    9. Repeat steps (A) - (H) at the left caliper.
  2. Perform the following to bleed the front brake system;
  3. Attach the clear hose to the right caliper.
  4. Turn the ignition switch to the "ON" position.
  5. Open bleeder valve 1/4 turn.
  6. With the bleeder valve open, pump the brake pedal 3 times and hold.
  7. Close the bleeder valve.
  8. Pump the brake pedal 3 times and hold.
  9. Open the bleeder valve 1/8 turn briefly to allow any remaining air to escape, and then close the bleeder valve.
  10. Repeat steps (F) and (G) as many times as necessary to eliminate all air in the line.
  11. Repeat steps (A) - (H) at the left caliper.
Perform the following to adjust the brake fluid level; Turn the ignition switch to the "LOCK" (OFF) position. Depress the brake pedal repeatedly (up to 40 times or more) until its depressing force suddenly feels very heavy (no pedal travel). Release the brake pedal. Adjust the brake fluid level between the "MIN" and "MAX" lines on the reservoir.

Posted on Aug 02, 2010

  • Duane Wong
    Duane Wong Aug 02, 2010

    Hydraulic Brake Booster (HBB) System Bleeding
    NOTE: Keep the brake fluid reservoir above the MIN lever during the entire procedure. Check the level frequently and add fluid as needed.

    NOTE: If a large quantity of brake fluid is drained during the bleeding procedure, the accumulator pressure will decrease abnormally. Do not bleed more than 0.11quart (0.1 liter) from each wheel at a time.


    1. Perform the following to fill the front brake system with fluid;

      1. Attach a clear hose to the right caliper bleeder valve. This helps to monitor air/fluid flow.
      2. Be sure the fluid level is between the "MIN" and "MAX" lines.
      3. Turn the ignition switch to the "LOCK" (OFF) position. Pump the brake pedal 3 - 4 times and hold it depressed.
      4. Open the right caliper bleeder valve 1/4 turn.
      5. With the bleeder valve still open, pump the brake pedal repeatedly to fill the line with fluid until no obvious air bubbles are seen. When no more obvious air bubbles are seen, and while the brake pedal is still being pumped, close the bleeder valve.
      6. Repeat steps (A) - (E) for the left caliper.
      7. Release the brake pedal when both sides are filled.

    2. Perform the following to fill the pump motor;

      1. Turn the ignition switch to the "ON" position to operate the pump motor.
      2. If the pump motor operates normally (normal operation sound), go to step 3.
      3. If the pump motor operation sound is dry and high-pitched, depress the brake pedal 3 or 4 times to introduce fluid into the pump motor. Then go to step 3.

    3. Perform the following to fill the accumulator with fluid;

      1. Wait for the pump motor to stop from step 2.
      2. Depress the brake pedal slowly 3 or 4 times with the ignition switch at the "ON" position. Observe the condition of the brake fluid in the reservoir.
      3. If the fluid is cloudy, leave it for 2 or 3 minutes until it becomes clear.
      4. Repeat the above procedure until no bubbles appear while pumping the brake pedal.

    4. Perform the following to fill the rear brake system with fluid;

      1. Attach a clear hose to the right caliper bleeder valve. This helps to monitor air/fluid flow.
      2. Be sure the fluid level is between the "MIN" and "MAX" lines.
      3. Turn the ignition switch to the "LOCK" (OFF) position. Pump the brake pedal 3 - 4 times and hold it depressed.
      4. Open the right caliper bleeder valve 1/4 turn.
      5. With the bleeder valve still open, pump the brake pedal repeatedly to fill the line with fluid until no obvious air bubbles are seen. When no more obvious air bubbles are seen, and while the brake pedal is still being pumped, close the bleeder valve.
      6. Repeat steps (A) - (E) for the left caliper.
      7. Release the brake pedal when both sides are filled.

    5. Perform the following to supply brake fluid into the power supply system;

      1. To release the pressure in the HBB power supply system, turn the ignition switch to the "LOCK" (OFF) position and depress the brake pedal repeatedly until its depressing force suddenly feels heavy (no pedal travel).
      2. Turn the ignition switch to the "ON" position and at the same time quickly depress the brake pedal approximately 20 times. Then confirm that the pump motor has stopped. This can take up to 2 minutes.
      3. Turn the ignition switch to the "LOCK" (OFF) position and depress the brake pedal repeatedly until its depressing force suddenly feels heavy (no pedal travel).
      4. Turn the ignition switch to the "ON" position to operate the pump motor. Confirm that the pump motor stops within 25 seconds. If the pump motor does not stop, repeat steps (A) through (C) above.

    6. Perform the following to supply fluid into the ABS system;

      1. Ensure that the ignition switch is at the "LOCK" (OFF) position.
      2. Start up the personal computer.
      3. Connect special tool MB991827 to special tool MB991824 and the personal computer.
      4. Connect special tool MB991911 to special tool MB991824.
      5. Connect special tool MB991911 to the data link connector.
      6. Turn the power switch of special tool MB991824 to the "ON" position.





        Vehicle Communication Interface (VCI) connection




        NOTE: When special tool MB991824 is energized, the indicator light in the tool will be illuminated in a green color.

      7. Start the MUT-III system on the personal computer.
      8. Turn the ignition switch to the "ON" position. Select from scan tool menu screen as follows:
        [SYSTEM SELECT ► ABS ► ACTUATOR TEST ► AIR BLEED]
      9. Depress and hold the brake pedal.
      10. Activate the actuator test [AIR BLEED (1)]. When the scan tool flashes confirmation that the AIR BLEED (1) operation is completed, proceed with AIR BLEED (2).
      11. Depress and hold the brake pedal.
      12. Select and activate [AIR BLEED (2)] on the scan tool screen. When the scan tool flashes confirmation that the AIR BLEED (2) operation is completed, go to step 7.

    7. Perform the following to bleed the rear brake system;

      1. Attach the clear hose to the right caliper to monitor air/fluid flow.
      2. Turn the ignition switch to the "ON" position.
      3. Open bleeder valve 1/4 turn.
      4. With the bleeder valve open, pump the brake pedal 3 times and hold.
      5. Close the bleeder valve.
      6. Pump the brake pedal 3 times and hold.
      7. Open the bleeder valve 1/8 turn briefly to allow any remaining air to escape, and then close the bleeder valve.
      8. Repeat steps (F) and (G) as many times as necessary to eliminate all air in the line.
      9. Repeat steps (A) - (H) at the left caliper.

    8. Perform the following to bleed the front brake system;

      1. Attach the clear hose to the right caliper to monitor air/fluid flow.
      2. Turn the ignition switch to the "ON" position.
      3. Open bleeder valve 1/4 turn.
      4. With the bleeder valve open, pump the brake pedal 3 times and hold.
      5. Close the bleeder valve.
      6. Pump the brake pedal 3 times and hold.
      7. Open the bleeder valve 1/8 turn briefly to allow any remaining air to escape, and then close the bleeder valve.
      8. Repeat steps (F) and (G) as many times as necessary to eliminate all air in the line.
      9. Repeat steps (A) - (H) for the left caliper.

    9. Perform the following to adjust the brake fluid level;

      1. Turn the ignition switch to the "LOCK" (OFF) position.
      2. Depress the brake pedal repeatedly (up to 40 times or more) until its depressing force suddenly feels very heavy (no pedal travel).
      3. Release the brake pedal.
      4. Adjust the brake fluid level between the "MIN" and "MAX" lines on the reservoir.

  • Rudy Cordova
    Rudy Cordova Aug 02, 2010

    thank you very much for your assistant. this will help me a lot. i have more quesstion. one is that noise a very sharp continous sound with key on only or when the eng. running. is this came from an empty pump or empty modulator or empty abs system. or just a warning sound because the brake is missing. 2 is the anti lock light and the red brake light will turn off if i just disconnect the battery for 3 to 10 minute and reconnect the battery. the brake is called integral abs all four sys are together with master cyl unlike my montero sport. are all separated. montero not sport --abs 40 amp fuse near the battery is working find but the fuse 10amp under the steering is hard to find. the picture does not match the fuse box. therefor i dont know if this is the cause of the problem. the fluid is bet max and min. i am not sure if bleeding will fix the problem since i have no special tool like the instruction said. i have a lot of experience on bleeding brakes but removing light and sound never. again thank you very much for your help

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1 Answer

What is anti lock


If you are referring to "anti-lock brakes", or "ABS", it means that when you depress the brake pedal hard enough, your computer recognizes the pressure and pulsates the brakes to prevent your wheels from locking up and the traditional skidding you see in movies.

ABS stops you quicker in emergency situations.

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ABS = Anti-lock Brake System.
TC = Traction Control System (Engine Control Module).
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I suspect bad brake pedal switch, but you should scan the ABS & TC ECU's.

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