2003 Infiniti FX45FACTORY OEM SERVICE PROCEDURE

Diagnostic Procedure (I35)

  1. Turn ignition switch to OFF position. Disconnect VIAS control solenoid valve harness connector. See Fig 1. Turn ignition switch to ON position. Check voltage between terminal No. 1 and ground with CONSULT-II or tester. Battery voltage should exist. If voltage is as specified, go to step  3. If voltage is not as specified, go to next step.
  2. Check the following:
    • Harness connectors M229 and F66.
    • Fuse block (J/B) connector M19.
    • 15-amp fuse.
    • Harness continuity between fuse and VIAS control solenoid valve.

      Repair harness or connectors.

  3. Turn ignition switch to OFF position. Disconnect ECM harness connectors. Check harness continuity between ECM terminal No. 27 and terminal No. 2. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Continuity should exist. Also check harness for short to ground and short to power. If results are as specified, go to next step. If results are not as specified, repair open circuit or short to ground or short to power in harness or connectors.
  4. Check VIAS control solenoid valve accordingly.
    • With CONSULT-II  - Reconnect disconnected harness connector. Turn ignition switch to ON position. Perform VIAS SOL VALVE in ACTIVE TEST mode. Check air passage continuity and operation delay time under the following conditions. See Fig 2. If results are as specified, go to next step. If results are not as specified, replace VIAS control solenoid valve.
    • Without CONSULT-II  - Check air passage continuity and operation delay time under the specified conditions. See Fig 3. If results are as specified, go to next step. If results are not as specified, replace VIAS control solenoid valve.
    Fig 1: Locating VIAS Control Solenoid Valve (I35)
    G00248133Courtesy of NISSAN MOTOR CO., U.S.A.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.