1997 Infiniti Q45 BaseFACTORY OEM SERVICE PROCEDURE

Control Units

CONTROL UNITS

Component Component Location
ABS/TCS Control Unit Behind right side of dash. See Figure .
A/C Control Unit Behind center of dash.
Air Bag Diagnosis Sensor Unit Under console, behind parking brake lever. See Figure .
A/T Control Unit Behind left kick panel. See Figure .
ASCD Control Unit Behind dash, left of steering column. See Figure .
Body Control Module (BCM) In dash, behind dash meter. See Figure .
Daytime Lamp Control Unit (Canada) Left side of engine compartment. See Figure .
Driver's Door Control Unit In driver's door.
Driver's Seat Control Unit Under driver's seat. See Figure .
ECM (ECCS Control Module) Behind right kick panel. See Figure .
Fuel Pump Control Module (FPCM) On left side of luggage compartment. See Figure .
NATS IMMU Under front of center console. See Figure .
Passenger's Door Control Unit In passenger front door.
Power Steering Control Unit Behind dash, right of steering column. See Figure .
Rear Left & Right Door Control Units In each respective rear door.
Shift Lock Control Unit Behind left side of dash. See Figure .
TAC Module Behind right side of dash, above kick panel. See Figure .
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:

  • • 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.