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 9 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.
Test for infinite resistance between K5 Automatic Level Control Module connector terminals listed below and ground.
- Terminal 7
- Terminal 9
- If less than infinite resistance
  Repair the short to ground on the circuit.
- Go to next step: If Infinite resistance
Disconnect harness connector at the Q4 Vehicle Level Control Solenoid Valve.
Test for less than 2 Ω between Q4 Vehicle Level Control Solenoid Valve connector terminal 1 and K5 Automatic Level Control Module connector terminal 9.
- 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 Q4 Vehicle Level Control Solenoid Valve connector terminal 2 and K5 Automatic Level Control Module connector terminal 7.
- If 2 Ω or greater
  Repair the open/high resistance in the circuit.
- Go to next step: If less than 2 Ω
Test for 11.4 - 12.6 Ω between Q4 Vehicle Level Control Solenoid Valve connector terminal 1 and Q4 Vehicle Level Control Solenoid Valve connector terminal 2.
- If not 11.4 - 12.6 Ω
  Replace the Q4 Vehicle Level Control Solenoid Valve
- Go to next step: If 11.4 - 12.6 Ω
Replace the K5 Automatic Level Control Module.