Test E: DTC's C1725/C1736 - Air Suspension Front/Rear Pneumatic Failure

Pinpoint Test E: DTC's C1725/C1736 - Air Suspension Front/Rear Pneumatic Failure
Normal Operation
The vehicle dynamic module (VDM) will command the air compressor and air solenoid valves to either fill or vent the air springs depending on the input from the 3 height sensors. The air compressor sends the air to the air springs first through the drier, then along the air lines, passing through several T-fittings and connections, through the air solenoid valves and finally to the air springs.

Possible Causes
^ Air leak(s)
^ Airline blockage(s)
^ Air line(s)
^ Mounting bracket(s)
^ Air compressor drier
^ Air spring solenoid valve(s)
^ Height sensor(s)
^ Air compressor
^ VDM
^ Air spring(s)

PINPOINT TEST E: DTC's C1725/C1726 - AIR SUSPENSION FRONT REAR PNEUMATIC FAILURE

E1-E3:

E4-E8:

E9-E14:

E15:

NOTE: It may be necessary to vent air from the front air suspension air springs during this pinpoint test.