Test I: The Air Compressor is Inoperative

Pinpoint Test I: The Air Compressor is Inoperative
Refer to Vehicle/Diagrams, Vehicle Dynamic Suspension for schematic and connector information.

Normal Operation
When the air suspension module engages the air suspension relay, fused battery voltage is supplied from battery junction box (BJB) fuse 112 (30A) to the relay along circuit 1053 (LB/PK), the voltage travels through the relay and to the air suspension compressor along circuit 538 (PK). The compressor is provided a ground path along circuit 57 (BK).

This pinpoint test is intended to diagnose the following:
^ Fuse
^ Wiring, terminals or connectors
^ Air compressor relay
^ Air compressor assembly
^ Air suspension module

I1-I2:

I2 (Continued)-I5:

I5 (Continued):