Test F: The Air Suspension Module Does Not Respond To The Scan Tool

PINPOINT TEST F: THE AIR SUSPENSION MODULE DOES NOT RESPOND TO THE SCAN TOOL

Normal Operation
The air suspension module communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the network connection to the air suspension module. The air suspension module shares the HS-CAN with the PCM, the transmission control module (TCM), the ABS module, the restraints control module (RCM), the 4X4 control module (if equipped) and the instrument cluster (IC). Voltage for the air suspension module is provided by circuits CBB65 (WH/OG) and SBB47 (WH/RD). Circuits GD120 (BK/GN) and GD133 (BK) provide ground.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Air suspension module

F1-F3:

F3-F4: