Bleeding After Changing Hydraulic Unit

1993 Saab 9000 CD, 2.3 B, StandardSECTION Bleeding After Changing Hydraulic Unit
  1. Remove brake fluid reservoir cover. Connect topping-up bottle to topping-up fitting (contained in Brake Bleeder Unit 88 19 096) and clamp topping-up fitting onto brake fluid reservoir. This will avoid the possibility of draining fluid reservoir.
  2. Disconnect ECU connector. Connect Breakout Box (86 11 06) and Breakout Box Lead (86 11 006) to ECU. See Fig 1 . Connect Jumper Harness (86 11 212) to breakout box as shown in illustration. See
  3. Bleed system using bleeder unit in following sequence: right front, left rear, left front, and right rear. When changing brake fluid, contents of brake fluid reservoir must be siphoned off and each brake caliper must be drained of correct amount of fluid. Front brake calipers should drain .006 qt. (.1 L). Rear brake calipers should drain .003 qt. (.05 L.)
  4. Disconnect breakout box and reconnect ECU. Turn ignition on and ensure ABS warning light goes out.

Fig 2 . Turn ignition on and run pump for one minute. Connect jumper harness clamp to ground 20 seconds after pump has started so outlet valves are opened. Disconnect clamp after 20 seconds.

Fig 1: Identifying Breakout Box & Breakout Box Lead
G93H84084Courtesy of SAAB-SCANIA OF AMERICA, INC.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.