1997 Infiniti QX4FACTORY OEM SERVICE PROCEDURE

Retrieving Codes

  1. If use of an OBD-II type scan tool is not available, DTCs can be retrieved by changing MIL output from Mode 1 to Mode 2. Mode 1 is the normal malfunction warning mode. Mode 2 displays self-diagnostic results.
    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.
  2. To switch MIL output from Mode 1 to Mode 2, locate and gain access to ECM. See ECM LOCATION table. Turn ignition on. Using a screwdriver, turn test mode selector fully clockwise. See Fig 1. After 2 seconds, turn test mode selector fully counterclockwise (back to original position). MIL should now be in Mode 2. When in Mode 2 with key on and engine off, MIL should begin flashing codes
    NOTE: DTCs retrieved by MIL may also be referred to as flash codes.
  3. The 4-digit DTCs (flash codes) are read as two 2-digit numbers. The first 2-digit number is indicated by a series of long flashes followed by a series of short flashes. E.g. 1 long flash followed by 2 short flashes indicates DTC 0102. See Figure. The DTCs retrieved by MIL are not numerically the same as DTCs retrieved from a scan tool.
  4. Write down codes and repair in order retrieved. To determine which circuit test to use, see DTC IDENTIFICATION table. After retrieving DTCs or performing a repair, clear DTCs from ECM memory.
ECM LOCATIONS

Application Location
Pathfinder Under Passenger Seat
Fig 1: Turning Test Mode Selector
G96I10965Courtesy of FORD MOTOR CO.
Factory Service Tools

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When to See a Mechanic

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

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

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