Circuit/System Testing

Ignition OFF, disconnect the connector at the K5 Automatic Level Control Module, ignition ON/Vehicle in Service Mode.
Test for less than 1 V between the K5 Automatic Level Control Module connector terminal 30 and ground.
- If 1 V or greater
  Repair the short to voltage on the circuit.
- Go to next step: If less than 1 V
Ignition OFF.
Disconnect harness connector at the G3 Air Suspension Compressor.
Test for infinite resistance between K5 Automatic Level Control Module connector terminals listed below and ground.
- Terminal 30
- Terminal 46
- If less than infinite resistance
  Repair the short to ground on the circuit.
- Go to next step: If Infinite resistance
Test for less than 2 Ω between G3 Air Suspension Compressor connector terminal 1 and K5 Automatic Level Control Module connector terminal 30.
- If 2 Ω or greater
  Repair the open/high resistance in the circuit.
- Go to next step: If less than 2 Ω
Test for less than 2 Ω between G3 Air Suspension Compressor connector terminal 2 and K5 Automatic Level Control Module connector terminal 46.
- If 2 Ω or greater
  Repair the open/high resistance in the circuit.
- Go to next step: If less than 2 Ω
Test for less than 2 Ω between the G3 Air Suspension Compressor connector terminal 2 and G3 Air Suspension Compressor connector terminal 1.
- If 2 Ω or greater
  Replace the G3 Air Suspension Compressor
- Go to next step: If less than 2 Ω
Replace the K5 Automatic Level Control Module.