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2003 Jeep Wrangler CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Jeep REPAIR SHOPS DON'T WANT YOU TO KNOW
Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!Select Section
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- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 Jeep Wrangler car and truck
repair procedures including Jeep engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your Jeep Wrangler automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
Computer Relearn Procedures -> DaimlerChrysler -> 1999-2002 Dakota, Durango, Ram Pick-Up & Ram Van -> 1999-2004 -> Controller Anti-Lock Brakes (CAB) -> Engine Performance -> Except 1999-2002 -> Light Truck & Vans -> Pinion Factor Procedure -> Powertrain Control Module (PCM) -> Sentry Key Immobilizer System (SKIS) -> Shift Quality -> Theft Alarm -> Transaxle Quick Learn Procedure
Vehicle: 2003 Jeep Wrangler Rubicon 4.0 L6 GAS
Powertrain Control Module (PCM)
Except 1999-2002
If battery cable has been disconnected, the PCM must relearn a new operating strategy. Connect battery cable and run engine until operating temperature is reached. After engine warm-up, drive vehicle under various operating conditions until PCM has relearned new strategy.
1999-2004
Anytime the PCM is replaced the VIN and vehicle mileage must be programmed into the new PCM. If the PCM is not programmed, Diagnostic Trouble Codes (DTCs) will set. To program the PCM, connect a DRB or suitably programmed ...
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BRAKE SERVICE PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
Drum Brakes -> Jeep -> Brake Service -> Brake Shoe Installation -> Brake Shoe Removal
Vehicle: 2003 Jeep Wrangler X 4.0 L6 GAS
Prior to removing brake shoes it is recommended that a suitable clip or restraining device be applied to the wheel cylinders to prevent the wheel cylinder pistons from being pushed out of their bores.
Brake Shoe Removal
- Raise and support vehicle.
- Remove wheel and tire assemblies, then the brake drums.
- Remove U-clip and washer from parking brake lever pivot pin,. Figs. and , then discard clip.
- Remove primary and secondary return springs.
- Remove spring retainers, hold-down springs, and retaining pins.
- Install suitable clamps over ends of wheel cylinders to hold pistons in place.
- Remove adj...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
DaimlerChrysler Corp./Jeep Light Trucks, SUVs & Vans -> Component Locations -> 1997-06 Wrangler & 1997-01 Cherokee
Vehicle: 2003 Jeep Wrangler Sport 4.0 L6 GAS
Re...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
DRIVESHAFT, Replace -> Front -> Rear
Vehicle: 2003 Jeep Wrangler X 4.0 L6 GAS
Front
- With vehicle in neutral, position vehicle on hoist.
- Remove skid plate if equipped to gain access to propeller shaft.
- Mark a line across axle pinion flange, propeller shaft, flange yoke and transfer case for installation reference.
- Remove U-joint strap bolts at pinion shaft yoke.
- Remove transfer case yoke bolts.
- Push rear of propeller shaft forward to clear transfer case yoke.
- Remove propeller shaft from vehicle.
- Reverse procedure to install, noting the following:
- Align reference marks.
- Torque U-joint strap bolts t...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
Alternator, Replace
Vehicle: 2003 Jeep Wrangler Rubicon 4.0 L6 GAS
- Remove battery ground cable.
- Remove alternator drive belt.
- Remove alternator pivot, mounting bolts and nuts.
- Position alternator for access to wire connector.
- Unsnap plastic cover from B+ terminal, if equipped.
- Remove B+ cable output terminal mounting nut at rear of alternator.
- Disconnect terminal fr...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
Chrysler LLC Trucks -> All Wheel Drive (AWD) Warning Lamp ->
Vehicle: 2003 Jeep Wrangler Sport 4.0 L6 GAS
This light monitors the AWD system. The light will turn on for a bulb check when the ignition switch is turned to the on position and may stay on for as long as three seconds. When the lamp is illuminated solid here is an A...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 2003 Jeep Wrangler Rubicon 4.0 L6 GAS
Inlet
- Drain cooling system into a suitable container.
- Reposition heater core inlet hose clamp at thermostat housing.
- Remove hose from thermostat housing.
- Reposition heater hose inlet clamp at heater core.
- Remove heater inlet hose from heater core.
- Remove hose from vehicle.
- Reverse procedu...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Jeep Wrangler X 4.0 L6 GAS
Belt tension is adjusted at the power steering pump or idler pulley if not equipped with power steering.
- Loosen power steering or idler pulley rear mounting bolts.
- Loosen power steering pump ...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Jeep Wrangler AUTOMOBILES
Component location diagrams for most 2003 Jeep Wrangler cars and light trucks sold in the U.S. from 1990+.
 Clutch Pedal Position Switch Diagram for 2003 Jeep Wrangler Sahara 4.0 L6 GASComponents on diagram: |
 Instrument Panel Connectors Diagram for 2003 Jeep Wrangler Sport 4.0 L6 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2003 Jeep Wrangler AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Jeep Wrangler cars and light trucks sold in the U.S.
 2003 Jeep Wrangler Sport 4.0 L6 GAS Wiring DiagramComponents on diagram: |
 2003 Jeep Wrangler Sport 4.0 L6 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Jeep Wrangler AUTOMOBILES
OEM TSB listings for most 2003 Jeep Wrangler cars and light trucks sold in the U.S. from 1985+.
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Document: AUTOMATIC TRANSMISSION DIAGNOSTIC TEARDOWN PROCEDURE - REVISED Vehicle: 2003 Jeep Wrangler Sahara 4.0 L6 GAS Auto Systems: |
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Document: AUTOMATIC TRANSMISSION DIAGNOSTIC TEARDOWN PROCEDURE - REVISED Vehicle: 2003 Jeep Wrangler Sahara 4.0 L6 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Jeep Wrangler AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Jeep Wrangler cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 2003 Jeep Wrangler cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 2003 Jeep Wrangler cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 2003 Jeep Wrangler cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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