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A pressure retaining valve (PRV) is located in each air spring which retains sufficient pressure to protect the air spring membrane during service and handling.
NOTE:
De-pressurization and re-pressurization of the air suspension system should be performed using the Jaguar approved diagnostic system prior to, and after, any work being carried out.
Solenoid Valve Block The solenoid valve block contains five individual solenoid valves (one per air spring and one for the vehicle reservoir). A pressure sensor is incorporated into the solenoid valve block and monitors air spring and reservoir pressure. The solenoid valve block is mounted on isolators to reduce valve operation noise. Pipe connections are provided for the front and rear air spring assemblies and also the reservoir and compressor. The compressor to valve block port and the rear air spring ports are 4 mm in diameter with the front air spring ports being 6 mm in diameter. Each of the solenoid valve block ports and air pipes are color coded (pink, blue, white, yellow, red and brown) for correct connection. Reservoir The reservoir has a volume of 4.5 liters with a maximum design pressure of 15 bar (218 psi). Dependent on load conditions, this store of reserve air is sufficient for two full lifts. The system automatically replenishes the reservoir by way of the compressor. Air Suspension Module The air suspension module (ASM) is accessed from the right-hand side of the vehicle, behind the back of the rear seat. The ASM can be recognized by the 4 individually colored connectors (gold, grey, yellow and pink) and the 'WABCO' logo on the front of the module. ASM calibration is required when either a replacement module is fitted, or if any height sensors have been removed/refitted or replaced.
NOTE:
When installing a new air suspension module it will be necessary to configure the module into the customer mode using the Jaguar approved diagnostic system.
Compressor The air compressor is located in the left-hand front wheel arch behind the bumper beam assembly. It contains an air filter, an integral regenerative air drier element plus an air exhaust solenoid valve. The compressor is isolated from the main body structure by 3 mounts, each incorporating a rubber bush and metal spring. The maximum pressure developed by the system is 15 bar (218 psi) with a compressor pressure relief valve fitted, set to relieve pressures above 17 Bar (247 psi). The |