Step # 1 Low Fluid In Booster Pump Reservoir Due to External Leak

STEP # 1 - LOW FLUID IN BOOSTER PUMP RESERVOIR DUE TO EXTERNAL LEAK.





A. Make ten medium to high effort brake applies with ignition off to de-pressurize the system. Check fluid level in booster pump reservoir by observing if level falls between the two gauge marks located on the inside of the pump reservoir. See Component Identification (Figure 2).

Note:
If pressure switch has a black plastic body, the and must be refitted with the updated pressure switch which has a gray plastic body (P/N 18018141).

B. Inspect the pressure switch and adjacent areas for external leaks. This may require wiping those areas dry and observing for fluid leakage during and after the pump motor run time. If fluid is observed, replace appropriate component.
C. With unit removed from vehicle, check for leakage at rear. Rubber boot should not have excess amounts of fluid inside. If fluid is observed, repair Powermaster with Seal Repair Kit 18020067.
D. Bleed and refill und to proper gauge level in reservoir with system in the de-pressurized state.