1991 Mitsubishi Mighty Max Service and Repair Manual

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Factory-Grade Data

1991 Mitsubishi Mighty Max service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical diagnostics with wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

  • Base Extended Cab Pickup 2-Door
  • Base Standard Cab Pickup 2-Door
  • 1 Ton Standard Cab Pickup 2-Door

Engines covered

  • 3.0L 2972CC 181Cu. In. V6 GAS SOHC Naturally Aspirated
  • 2.4L 2351CC l4 GAS SOHC Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

1991 Mitsubishi Mighty Max Recalls & Complaints

NHTSA #95V10300424/05/1995Component: SEAT BELTS:FRONT:BUCKLE ASSEMBLY

THE FRONT SAFETY BELT BUCKLE RELEASE BUTTONS CAN BREAK. THESE RED PLASTIC RELEASE BUTTONS ARE MARKED "PRESS." IF A BUTTON BREAKS, PIECES CAN FALL INTO THE BUCKLE ASSEMBLY CAUSING THE BUCKLE TO OPERATE

Consequence

THE SAFETY BELTS WOULD NOT PROVIDE ADEQUATE PROTECTION TO AN OCCUPANT IN A VEHICLE CRASH.

Remedy

OWNERS SHOULD PROMPTLY CHECK THE CONDITION AND OPERATION OF BOTH FRONT SAFETY BELT BUCKLES AND CAREF

TSB #10170852

This Technical Service Bulletin updates the door adjustment procedure in the Body Section of the applicable service manuals.

TSB #10169006

This is a service newsletter (Tech Talk) that was sent out to dealers.

TSB #10163703

This is a Technical Service Bulletin sent to dealers. This bulletin supersedes TSB-18-00-003, issued April, 2018, to add updated information for Carrying Capacity Reduced Label.

TSB #10130469

This is a service newsletter (Tech Talk) that was sent out to dealers.

TSB #39062

IMPROVED EXHAUST MANIFOLD STUD. *TW

20250220Component: SEAT BELTS

The contact owns a 1991 Mitsubishi Mighty Max. The contact stated while the vehicle was parked, the driver's side front seat belt was latched; however, the front driver's seat belt buckle failed to la

20080616Component: TIRES

TIRE TREADS ARE SEPARATING/CRACKING IN BETWEEN THE TREADS. NOT A FAILURE YET, BUT I DON'T THINK THIS IS NORMAL OR SAFE, AND JUST WANT IT TO BE KNOWN IN CASE OTHERS ARE HAVING THE SAME PROBLEM. *TR

20011115Component: POWER TRAIN:CLUTCH ASSEMBLY

CLUTCH WILL EASILY BREAK. IN NOVEMBER OF 1999 CLUTCH BROKE , AND IN APRIL 2001 CLUTCH BROKE AGAIN. DEALER WAS NO LONGER WILLING TO REPAIR CLUTCH. *AK

20010307Component: ELECTRICAL SYSTEM:IGNITION:MODULE

VEHICLE STALLED, CHECK ENGINE LIGHT CAME ON. DEALER FOUND COMPUTER MODULE NEEDED TO BE REPLACED. *AK IDLE SPEED CONTROL FAILED, ELECTRICAL ENGINE CONTROL MODULE UNABLE TO CONTROL, IT BURNED ITSELF U

20010307Component: VEHICLE SPEED CONTROL:CRUISE CONTROL

VEHICLE STALLED, CHECK ENGINE LIGHT CAME ON. DEALER FOUND COMPUTER MODULE NEEDED TO BE REPLACED. *AK IDLE SPEED CONTROL FAILED, ELECTRICAL ENGINE CONTROL MODULE UNABLE TO CONTROL, IT BURNED ITSELF U

Showing the 5 most serious of 14 complaints filed with NHTSA.

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