Test D: DTC C1724 - Air Suspension Height Sensor Power Circuit Failure

Pinpoint Test D: DTC C1724 - Air Suspension Height Sensor Power Circuit Failure
Normal Operation
The 2 front height sensors receive a 5-volt reference voltage from the vehicle dynamic module (VDM) along circuit 426 (RD/BK) and ground along circuit 432 (BK/PK). The rear height sensor receives a 5-volt reference voltage from the VDM along circuit 429 (VT/LG) and ground along circuit 432 (BK/PK).
The air suspension service switch is a normally-closed switch that is used to turn the vehicle dynamic suspension system ON and OFF. The vehicle dynamic module (VDM) sends voltage along circuit 429 (VT/LG) into the switch and looks for that voltage to return along circuit 418 (DG/YE). If the VDM does not receive voltage along circuit 418 (DG/YE) it will deactivate the vehicle dynamic suspension system.

Possible Causes
^ Circuit open
^ Circuit shorted
^ Height sensor(s)
^ VDM

PINPOINT TEST D: DTC C1724 - AIR SUSPENSION HEIGHT SENSOR POWER CIRCUIT FAILURE

D1:

D2-D6:

CAUTION: The Flex Probe Kit must be used for all test connections. Use of standard multimeter probes may damage wiring terminals.