Category:
Compact Pickup Truck
Target Audience:
Jeep Comanche MJ owners, DIY mechanics, automotive repair shops, restoration enthusiasts.
Competitors:
Ford Ranger, Chevrolet S-10, Nissan Hardbody, Toyota Pickup.
Unique Selling Points:
Unibody construction with XJ Cherokee platform sharing, robust 4x4 systems, durable Jeep powertrains, unique styling for its era.
Manual Value Proposition:
Provides essential, factory-accurate information for maintaining, repairing, and troubleshooting the Jeep Comanche MJ, saving owners money on labor and ensuring correct procedures are followed.
Years Covered:
1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
Regions Covered:
Global (based on factory specifications)
Estimated Page Count:
Varies by specific print edition, typically 1000+ pages for comprehensive factory manuals covering multiple model years and configurations.
Type:
Factory Service Repair Manual (FSM), Workshop Manual, Troubleshooting Guide, Maintenance Manual
Powertrain:
Engine mechanical, fuel system, ignition system, cooling system, exhaust system, powertrain control module (PCM) diagnosis.
Drivetrain:
Manual transmission (AX-4, BA-10/5, NV3550), Automatic transmission (A904, AW-4), Transfer case (Command-Trac, Selec-Trac), Axles (Dana 30, Dana 35, AMC 20), Driveshafts, CV joints.
Chassis:
Front suspension (solid axle, independent suspension options), Rear suspension (leaf springs, coil springs), Steering system, Brake system (front disc, rear drum/disc), Wheel bearings, Hubs.
Electrical:
Battery, charging system, starting system, lighting system, instrument cluster, gauges, power windows, power locks, audio system, HVAC controls, anti-theft systems (if applicable), wiring diagrams.
Body And Interior:
Body panels, doors, latches, hinges, glass, interior trim, seats, upholstery, HVAC components (blower motor, evaporator, heater core), dashboard, body sealant, rust prevention.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs, lubrication, tune-ups, tire rotations, battery maintenance.
Repair:
Engine rebuilds, transmission overhauls, suspension component replacement, brake service, electrical component diagnostics and repair, body panel repair, HVAC system servicing.
Troubleshooting:
Diagnostic flowcharts for common drivability issues, electrical faults, starting problems, cooling system failures, and braking system malfunctions. Includes symptom-based troubleshooting.
Diagnostics:
On-board diagnostics (OBD-I for earlier models), specific diagnostic trouble codes (DTCs), testing procedures for sensors, actuators, and control modules.
Depth:
Comprehensive, covering routine maintenance to complete engine and transmission overhauls, including detailed specifications, torque values, and diagnostic procedures.
Engine Options:
2.1L (128 cu in) Turbocharged Diesel (Renault J8S), 2.5L (150 cu in) AMC I4 (J-T) (carbureted/fuel-injected), 4.0L (242 cu in) AMC I6 (Renix/H.O. fuel-injected).
Horsepower 4 0L:
173-190 hp (depending on year and H.O. version)
Torque 4 0L:
220-235 lb-ft (depending on year and H.O. version)
Horsepower 2 5L:
115-130 hp
Torque 2 5L:
130-145 lb-ft
Fuel Delivery 4 0L:
Electronic Fuel Injection (EFI), Multi-Point Fuel Injection (MPFI) for later 4.0L H.O.
Fuel Type 4 0L:
Unleaded gasoline (87 octane recommended)
Fuel Type 2 5L:
Unleaded gasoline (carbureted or TBI/MPI depending on year)
Fuel Type Diesel:
Diesel fuel
Transmission Type Standard:
4-speed manual (e.g., Peugeot/Citroen BA-10/5 or Jeep AX-4/AX-5)
Transmission Type Optional:
3-speed automatic (Chrysler A904), 4-speed automatic (Chrysler AW-4)
Transfer Case Options:
Command-Trac (part-time 4WD), Selec-Trac (full-time 4WD available on some models).
Fluid Type Automatic:
ATF+3 or ATF+4 (check specific year manual for exact spec, likely ATF+3 for most)
Fluid Type Manual:
GL-3 or GL-4 gear oil (e.g., 75W-90)
NHTSA Crash Test Results:
Limited data available for this era, but generally considered robust for its class. Manual will contain passive safety system details.
Braking System:
Front disc brakes, Rear drum brakes (optional rear disc on some higher trims/later models).
Seat Belts:
Lap and shoulder belts, rear seat belts (standard on most models).
Oil Change Interval:
3,000-5,000 miles or 6 months (depending on oil type and driving conditions)
Air Filter Replacement:
15,000-30,000 miles or annually, inspect every oil change.
Spark Plug Replacement:
30,000-60,000 miles (depending on plug type, e.g., conventional, platinum)
Engine Oil Spec 4 0L:
10W-30 or 10W-40 API SJ or SL (check manual for exact API rating by year), 5 quarts with filter.
Coolant Type:
Ethylene glycol coolant, typically a 50/50 mix with distilled water. Mopar OAT or HOAT coolant recommended if available for later models.
Brake Fluid Type:
DOT 3 or DOT 4.
Engine 4 0L:
Cracked cylinder head (later 4.0L HO), oil filter adapter O-ring leaks, oil pressure sender issues.
Transmission Manual:
Peugeot BA-10/5 durability concerns, internal wear on bearings and synchros.
Suspension:
Leaf spring fatigue, ball joint wear, track bar issues (if equipped).
Electrical:
Corroded grounds, aging wiring harnesses, intermittent sensor faults.
