Test V: Unable To Detect Pumping

Check Compressor Hook-up New Generation Star (NGS) tester. See EQUIPMENT HOOK-UP under TESTING & DIAGNOSIS. Rotate dial (on scan tester) to menu item DIAGNOSTIC DATA LINK, and press trigger to select. Select VDM-VEHICLE DYNAMICS MODULE. Select ACTIVE COMMAND MODES. Select AIR SUSPENSION CONTROLS. Command COMPRESSOR ON and OFF. Compressor should turn on and off. If compressor operates as specified, go to next step. If compressor does not operate as specified, go to TEST W.
Check Solenoid Function Ensure compressor is off. On same screen, select PIDs. On 1996 models, select ASLFSOL, ASRFSOL, ASRRSOL or ASLRSOL. On 1997 models, select ASRRSOL or ASLRSOL. On all models, press start (button 3). Command COMPRESSOR: ON. If corner of vehicle raises, go to next step. If corner of vehicle does not raise, go to TEST X .
Check Mounting Points Check all height sensor mounting points. Check for proper height sensor installation and for damaged mounting points. If installation and mounting points are okay, go to next step. If installation and/or mounting points are worn or damaged, repair as necessary and repeat ON-DEMAND SELF-TEST and PNEUMATIC TEST under DIAGNOSTIC TEST MODE .
Check For Parameter Identification (PID) Output Change -Rotate dial (on scan tester) to menu item DIAGNOSTIC DATA LINK, and press trigger to select. Select VDM-VEHICLE DYNAMICS MODULE. Select ACTIVE COMMAND MODES. Select AIR SUSPENSION CONTROLS. Select PID/DATA MONITOR and RECORD. On 1996 models, select LF-HGT, RF-HGT, LR-HGT or RR-HGT. On 1997 models, select LR_HGT or RR_HGT. On all models, remove appropriate height sensor from ball stud. Monitor PID and collapse and extend height sensor. If PID changes as height sensor is collapsed and extended, perform accurate trim test. See ACCURATE TRIM TEST under DIAGNOSTIC TEST MODES . If PID does not change, go to TEST D .