Grand Cherokee 4WD V8-5.2L VIN Y (1998)
Vacuum Reservoir HVAC: Description and Operation
Vacuum Reservoir
The vacuum reservoir is mounted in the engine compartment on the underside of the battery tray. The battery and battery tray must be removed
from the vehicle to access the vacuum reservoir for service.
Engine vacuum is stored in the vacuum reservoir. The stored vacuum is used to operate the vacuum-controlled vehicle accessories during periods
of low engine vacuum such as when the vehicle is climbing a steep grade, or under other high engine load operating conditions.
The vacuum reservoir cannot be repaired and, if faulty or damaged, it must be replaced.
