Conditions For Setting DTC

1998 Oldsmobile Achieva 3.1 M, 4T40E/MN4SECTION Conditions For Setting DTC
WARNING: This page is about a different car, the 1998 Pontiac Sunfire and 1998 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

DTC sets when driver and passenger deployment loops are not open, shorted to voltage or shorted to ground, and passenger deployment loop resistance is less than 1.4 ohms. Test occurs only once each ignition cycle when IGNITION POSITIVE VOLTAGE is in normal range.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

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

Affiliate disclosure: We may earn a commission at no extra cost to you.

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.