1990 Chrysler ImperialFACTORY OEM SERVICE PROCEDURE

DRB-II Read Sensor Values

This mode on DRB-II allows technician to read coolant temperature in degrees Fahrenheit or Centigrade, manifold pressure in inches of vacuum or kilopascals, AIS motor in steps, adaptive fuel factor in percent, barometric pressure in inches of mercury or kilopascals, engine speed in RPM, SBEC spark advance in degrees, vehicle speed given in MPH and oxygen sensor state given as center, rich or lean.

Factory Service Tools

Use the Manual With the Right Hardware

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

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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.