1998 Infiniti QX4FACTORY OEM SERVICE PROCEDURE

Using Scan Tool

  1. Ensure engine is warmed to normal operating temperature. If engine does not start, continue with testing. Turn ignition on. Ensure test equipment is properly attached.
  2. Using the scan tool, select and enter the following data:
    • Select vehicle and engine selection menu.
    • Select year, engine, model and any additional information requested by scan tool.
    • Select PCM.
    • Select DTCs.
    • Select DIAGNOSTIC TEST MODE RESULTS.
  3. At this point, scan tool should display all DTCs. Write down codes in order displayed. If a communication problem exists between scan tool and PCM, check for loose power and data cables to scan tool.
NOTE: Before switching MIL to Mode 2, perform bulb check (key on engine off). If MIL is inoperative, check and repair MIL circuit as necessary.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.