1984 Isuzu Impulse StandardFACTORY OEM SERVICE PROCEDURE

Clearing Trouble Codes

To clear memory of trouble codes, disconnect No. 4 fuse in the fuse box. Connect diagnostic terminals together, turn ignition "ON" and make sure that only code 12 is displayed. Disconnect diagnostic terminals.

NOTE: Disconnecting the 13 pole connector from the MCU will also clear the memory. Removing No. 4 fuse will also stop clock and other electrical equipment.
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.

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