Abs-III Function Check "B": Hold Function Check
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 1991 Pontiac Grand Prix, 1991 Oldsmobile Cutlass Supreme, 1991 Buick Regal, 1990 Pontiac Grand Prix, and 1990 Oldsmobile Cutlass Supreme. However, it is still accessible from the selected car via links, so may be relevant.
- Attach Tech I (94-00101-A) scanner. Raise vehicle with assistant in driver's seat. Turn ignition on and put transmission in Neutral. Instruct assistant to energize the rear hold solenoids with scanner (Rear Hold Function on ABS-III function check menu). Apply medium pressure to service brake.
- Note pedal travel and pump operational pattern while solenoid is energized. Rear wheel should turn freely for 6 seconds before brake begins application. If brake applies in 5 seconds or less, brake pedal fades to floor, or pump runs excessively, replace Powermaster-III rear solenoid. If problem persists, replace Powermaster-III. If okay, proceed to next step.
- Instruct assistant to moderately apply brakes. Energize front HOLD solenoids with scanner (Front Hold Function on ABS-III function check menu). Brake fluid spraying within reservoir should not be heard. Apply medium pressure to service brake.
- Wheel should turn freely for 6 seconds before brake begins application with only driveline resistance. If brake applies in 5 seconds or less, brake pedal fades to floor, or pump runs unacceptably, replace appropriate solenoid in Powermaster-III. If condition continues, replace Powermaster-III.