Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Jeep Wrangler V6-3.6LFACTORY OEM SERVICE PROCEDURE
Repair and Diagnosis
- A L L Diagnostic Trouble Codes ( DTC )
- Relays and Modules
- Relays and Modules - Accessories and Optional Equipment
- Relays and Modules - Body and Frame
- Relays and Modules - Brakes and Traction Control
- Relays and Modules - Cooling System
- Relays and Modules - HVAC
- Relays and Modules - Instrument Panel
- Relays and Modules - Power and Ground Distribution
- Relays and Modules - Powertrain Management
- Relays and Modules - Restraints and Safety Systems
- Relays and Modules - Starting and Charging
- Relays and Modules - Steering and Suspension
- Relays and Modules - Transmission and Drivetrain
- Sensors and Switches
- Sensors and Switches - Accessories and Optional Equipment
- Sensors and Switches - Body and Frame
- Sensors and Switches - Brakes and Traction Control
- Sensors and Switches - Cooling System
- Sensors and Switches - Cruise Control
- Sensors and Switches - Engine
- Sensors and Switches - HVAC
- Sensors and Switches - Instrument Panel
- Sensors and Switches - Lighting and Horns
- Sensors and Switches - Powertrain Management
- Sensors and Switches - Restraints and Safety Systems
- Sensors and Switches - Starting and Charging
- Sensors and Switches - Steering and Suspension
- Sensors and Switches - Transmission and Drivetrain
- Sensors and Switches - Windows and Glass
- Sensors and Switches - Wiper and Washer Systems
- Maintenance
- Alignment
- Tune-up and Engine Performance Checks
- Timing Component Alignment Marks
- Drive Belt
- Filters
- Hoses
- Fluids
- Brake Bleeding
- Air Bag(s) Arming and Disarming
- Seat Belt Arming and Disarming
- Fuses and Circuit Breakers
- Service Reminder Indicators
- Wheels and Tires
- Jump Starting
- Towing Information
- Vehicle Lifting
Description and Operation- Service Intervals
- Using Maintenance Schedules
- OEM Indicator Schedules or ALLDATA Mileage Schedules
- Condition/Indicator Based Maintenance Services
- Routine Service
- Normal Service
- 8000 MI or 12800 KM
- 16000 MI or 25600 KM
- 24000 MI or 38400 KM
- 32000 MI or 51200 KM
- 40000 MI or 64000 KM
- 48000 MI or 76800 KM
- 56000 MI or 89600 KM
- 64000 MI or 102400 KM
- 72000 MI or 115200 KM
- 80000 MI or 128000 KM
- 88000 MI or 140800 KM
- 96000 MI or 153600 KM
- 104000 MI or 166400 KM
- 112000 MI or 179200 KM
- 120000 MI or 192000 KM
- 128000 MI or 204800 KM
- 136000 MI or 217600 KM
- 144000 MI or 230400 KM
- Severe Service
- 8000 MI or 12800 KM
- 16000 MI or 25600 KM
- 24000 MI or 38400 KM
- 32000 MI or 51200 KM
- 40000 MI or 64000 KM
- 48000 MI or 76800 KM
- 56000 MI or 89600 KM
- 64000 MI or 102400 KM
- 72000 MI or 115200 KM
- 80000 MI or 128000 KM
- 88000 MI or 140800 KM
- 96000 MI or 153600 KM
- 104000 MI or 166400 KM
- 112000 MI or 179200 KM
- 120000 MI or 192000 KM
- 128000 MI or 204800 KM
- 136000 MI or 217600 KM
- 144000 MI or 230400 KM
- Engine, Cooling and Exhaust
- Engine
- Actuators and Solenoids - Engine
- Compression Check
- Camshaft, Lifters and Push Rods
- Cylinder Block Assembly
- Cylinder Head Assembly
- Drive Belts, Mounts, Brackets and Accessories
- Engine Lubrication
- Intake Manifold
- Seals and Gaskets
- Sensors and Switches - Engine
- Timing Components
- Tune-up and Engine Performance Checks
- Water Pump
Service Precautions- Description and Operation
Testing and Inspection
Service and Repair
Specifications
Technical Service Bulletins
Tools and Equipment
- Cooling System
- Coolant
- Coolant Line/Hose
- Coolant Reservoir
- Radiator Cooling Fan
- Engine - Coolant Temperature Sensor/Switch
- Heater Core
- Radiator
- Radiator Cap
- Relays and Modules - Cooling System
- Sensors and Switches - Cooling System
- Thermostat
- Water Pump
- Description and Operation
- Testing and Inspection
- Service and Repair
- Specifications
- Tools and Equipment
- Exhaust System
- Technical Service Bulletins
- Engine
- Powertrain Management
- Relays and Modules - Powertrain Management
- Sensors and Switches - Powertrain Management
- Tune-up and Engine Performance Checks
- Computers and Control Systems
- Accelerator Pedal Position Sensor
- Air Temperature Sensor ( Ambient / Intake )
- Camshaft Position Sensor
- Coolant Temperature Sensor/Switch (For Computer)
- Crankshaft Position Sensor
- Data Link Connector
- Engine Control Module
- Fuel Level Sensor
- Fuel Tank Pressure Sensor
- Information Bus
- Knock Sensor
- Main Relay (Computer/Fuel System)
- Manifold Pressure/Vacuum Sensor
- Oil Pressure Sensor
- Oxygen Sensor
- Relays and Modules - Computers and Control Systems
- Sensors and Switches - Computers and Control Systems
- Variable Valve Timing Actuator
- Variable Valve Timing Solenoid
- Testing and Inspection
- Technical Service Bulletins
- Tools and Equipment
- Emission Control Systems
- Fuel Delivery and Air Induction
- Fuel Pressure
- Fuel Pressure Release
- Accelerator Pedal
- Accelerator Pedal Position Sensor
- Air Cleaner Housing
- Fuel
- Fuel Filler Cap
- Fuel Filter
- Fuel Injector
- Fuel Line Coupler
- Fuel Pressure Regulator
- Fuel Pump
- Fuel Rail
- Fuel Return Line
- Fuel Supply Line
- Fuel Tank
- Main Relay (Computer/Fuel System)
- Relays and Modules - Fuel Delivery and Air Induction
- Sensors and Switches - Fuel Delivery and Air Induction
- Throttle Body
- Service Precautions
- Description and Operation
- Specifications
- Tools and Equipment
- Ignition System
- Transmission Control Systems
- PROM - Programmable Read Only Memory
- Technical Service Bulletins
- Transmission and Drivetrain
- Automatic Transmission/Transaxle
- Control Module
- Fluid - A/T
- Fluid Filter - A/T
- Fluid Line/Hose
- Fluid Pan
- Lamps and Indicators - A/T
- Relays and Modules - A/T
- Seals and Gaskets
- Sensors and Switches - A/T
- Shift Indicator - A/T
- Shift Interlock
- Shifter A/T
- Shift Linkage
- Torque Converter
- Transmission Cooler
- Transmission Speed Sensor
- Valve Body
- Description and Operation
- Description
- Operation
- Freewheeling Clutch - Description
- Freewheeling Clutch - Operation
- Input Clutch - Description
- Input Clutch - Operation
- Park Lock Cable - Description
- Park Lock Cable - Operation
- Temperature Sensor/Park-Neutral Contact - Description
- Temperature Sensor/Park-Neutral Contact - Operation
- Oil Level Control - Description
- Oil Level Control - Operation
- Planetary Geartrain - Description
- Planetary Geartrain - Operation
- Holding Clutch - Description
- Holding Clutch - Operation
- Transmission Oil Pump - Description
- Transmission Oil Pump - Operation
- Transmission Solenoid - Description
- Transmission Solenoid - Operation
- Testing and Inspection
- Service and Repair
- Procedures
- Removal and Replacement
- Overhaul
- NAG1 Automatic Transmission - Disassembly
- NAG1 Automatic Transmission - Assembly
- NAG1 Automatic Transmission Subassemblies
- B1 Clutch - Disassembly
- B1 Clutch - Assembly
- B2 Clutch - Disassembly
- B2 Clutch - Assembly
- Freewheeling Clutch - Disassembly
- Freewheeling Clutch - Assembly
- K1 Clutch - Disassembly
- K1 Clutch - Assembly
- K2 Clutch - Disassembly
- K2 Clutch - Assembly
- K3 Clutch - Disassembly
- K3 Clutch - Assembly
- Planetary Geartrain - Disassembly
- Planetary Geartrain - Assembly
- Transmission Oil Pump - Disassembly
- Transmission Oil Pump - Cleaning
- Transmission Oil Pump - Inspection
- Transmission Oil Pump - Assembly
Diagrams- Specifications
- Technical Service Bulletins
- Tools and Equipment
- Clutch
- Differential Assembly
- Differential Cover
- Differential Lock
- Fluid - Differential
- Seals and Gaskets
- Sensors and Switches - Differential
- Description and Operation
- Testing and Inspection
Adjustments- Service and Repair
- Removal and Replacement
- Overhaul
- Front Axle - 186FBI
- Front Axle - 216FBI
- Rear Axle - 226RBI
- Axle Shaft Bearing - Installation
- Axle Shaft Bearing - Removal
- Differential Carrier - Assembly
- Differential Carrier - Disassembly
- Differential Carrier - Installation
- Differential Carrier - Removal
- Differential Carrier Bearing - Installation
- Differential Carrier Bearing - Removal
- Differential Coil - Installation
- Differential Coil - Removal
- Pinion Gear/Ring Gear - Installation
- Pinion Gear/Ring Gear - Removal
- Trac-Lok Differential Carrier - Assembly
- Trac-Lok Differential Carrier - Disassembly
- Tru-Lok Differential Carrier - Installation
- Tru-Lok Differential Carrier - Removal
- Specifications
- Technical Service Bulletins
- Tools and Equipment
- Drive Axles, Bearings and Joints
- Drive/Propeller Shafts, Bearings and Joints
- Flex Plate
- Flywheel
- Lamps and Indicators - Transmission and Drivetrain
- Manual Transmission/Transaxle
- Relays and Modules - Transmission and Drivetrain
- Sensors and Switches - Transmission and Drivetrain
- Transfer Case
- Transmission Control Systems
- Technical Service Bulletins
- Automatic Transmission/Transaxle
- Brakes and Traction Control
- Antilock Brakes / Traction Control Systems
- Brake Bleeding
- Brake Pedal Assy
- Disc Brake System
- Hydraulic System
- Parking Brake System
- Power Brake Assist
- Relays and Modules - Brakes and Traction Control
- Sensors and Switches - Brakes and Traction Control
- Service Precautions
- Description and Operation
- Testing and Inspection
- Specifications
- Technical Service Bulletins
- Tools and Equipment
- Starting and Charging
- Sensors and Switches - Starting and Charging
- Relays and Modules - Starting and Charging
- Battery
- Charging System
- Starting System
- Power and Ground Distribution
- Power and Ground Distribution
- Steering and Suspension
- Alignment
- Relays and Modules - Steering and Suspension
- Sensors and Switches - Steering and Suspension
- Steering
- Center Link
- Front Steering Knuckle
- Pitman Arm
- Power Steering
- Relays and Modules - Steering
- Steering Column
- Steering Damper
- Steering Gear
- Steering Mounted Controls Communication Module
- Steering Shaft
- Steering Wheel
- Tie Rod
- Description and Operation
- Testing and Inspection
- Service and Repair
- Specifications
- Technical Service Bulletins
- Tools and Equipment
- Suspension
- Axle Beam
- Ball Joint
- Control Arm
- Cross-Member
- Front Steering Knuckle
- Lateral Stabilizer Rod
- Sensors and Switches - Suspension
- Stabilizer Bar
- Stabilizer Bar Control Switch
- Stabilizer Bushing
- Stabilizer Link
- Description and Operation
- Front Suspension Stabilizer Bar Actuator - Description
- Front Stabilizer Bar - Description
- Front Disconnecting Stabilizer Bar - Description
- Front Stabilizer Bar - Operation
- Front Disconnecting Stabilizer Bar - Operation
- Rear Suspension Stabilizer Bar - Description
- Rear Suspension Stabilizer Bar - Operation
- Testing and Inspection
- Service and Repair
- Suspension Spring ( Coil / Leaf )
- Suspension Strut / Shock Absorber
- Suspension Travel Bumper
- Wheel Bearing
- Wheel Hub
- Description and Operation
- Testing and Inspection
- Specifications
- Technical Service Bulletins
- Tools and Equipment
- Wheels and Tires
- Technical Service Bulletins
- Heating and Air Conditioning
- Air Door
- Air Duct
- Air Register
- Ambient Temperature Sensor / Switch HVAC
- Blower Motor
- Cabin Air Filter / Purifier
- Cabin Temperature Sensor / Switch
- Compressor HVAC
- Condenser HVAC
- Control Assembly
- Control Module HVAC
- Evaporator Core
- Evaporator Temperature Sensor / Switch
- Expansion Valve
- Heater Core
- High Pressure Safety Valve HVAC
- Hose/Line HVAC
- Housing Assembly HVAC
- Receiver Dryer
- Refrigerant
- Refrigerant Oil
- Refrigerant Pressure Sensor / Switch
- Relays and Modules - HVAC
- Sensors and Switches - HVAC
- Service Port HVAC
- Solar Sensor
- Service Precautions
- Description and Operation
- Testing and Inspection
- Service and Repair
- Specifications
- Tools and Equipment
- Restraints and Safety Systems
- Repairs and Inspections Required After a Collision
- Air Bag Systems
- Head Restraint System
- Relays and Modules - Restraints and Safety Systems
- Seat Belt Systems
- Sensors and Switches - Restraints and Safety Systems
- Service Precautions
- Description and Operation
- Testing and Inspection
- Service and Repair
- Specifications
- Technical Service Bulletins
- Tools and Equipment
- Accessories and Optional Equipment
- Antenna
- Antitheft and Alarm Systems
- Cellular Phone
- Driver/Vehicle Information Display
- Driver / Vehicle Information Display Switch
- Integrated Accessory Switch Assembly
- Navigation System
- Radio, Stereo, and Compact Disc
- Relays and Modules - Accessories and Optional Equipment
- Sensors and Switches - Accessories and Optional Equipment
- Steering Mounted Controls Communication Module
- Towing / Trailer System
- Trailer Connector
- Technical Service Bulletins
- Body and Frame
- Air Bag(s) Arming and Disarming
- Repairs and Inspections Required After a Collision
- Seat Belt Arming and Disarming
- Auxiliary Step / Running Board
- Bumper
- Cowl
- Doors, Hood and Trunk
- Doors
- Front Door
- Rear Door
- Technical Service Bulletins
- Fuel Door
- Hood
- Trunk / Liftgate
- Technical Service Bulletins
- Doors
- Exterior Moulding / Trim
- Fender
- Frame
- Grille
- Interior Moulding / Trim
- Carpet
- Console
- Dashboard / Instrument Panel
- Air Bag(s) Arming and Disarming
- Seat Belt Arming and Disarming
- Service Precautions
- Service and Repair
- Instrument Cluster Bezel - Removal
- Instrument Cluster Bezel - Installation
- Instrument Panel - Removal
- Instrument Panel - Installation
- Instrument Panel Center Bezel - Removal
- Instrument Panel Center Bezel - Installation
- Instrument Panel Cover - Removal
- Instrument Panel Cover - Installation
- Steering Column Opening Cover - Removal
- Steering Column Opening Cover - Installation
- Glove Compartment
- Passenger Assist Handle
- Sun Visor
- Trim Panel
- Service and Repair
- Locks
- Mirrors
- Paint, Striping and Decals
- Relays and Modules - Body and Frame
- Roll Bar
- Roof and Associated Components
- Seats
- Sensors and Switches - Body and Frame
- Sound Proofing / Insulation
- Tailgate
- Towing Hook / Bracket
- Unibody
- Weatherstrip
- Service Precautions
- Description and Operation
- Testing and Inspection
- Service and Repair
- Specifications
- Technical Service Bulletins
- Tools and Equipment
- Cruise Control
- Instrument Panel, Gauges and Warning Indicators
- Audible Warning Device
- Clock
- Compass
- Dashboard / Instrument Panel
- Air Bag(s) Arming and Disarming
- Seat Belt Arming and Disarming
- Service Precautions
- Service and Repair
- Instrument Cluster Bezel - Removal
- Instrument Cluster Bezel - Installation
- Instrument Panel - Removal
- Instrument Panel - Installation
- Instrument Panel Center Bezel - Removal
- Instrument Panel Center Bezel - Installation
- Instrument Panel Cover - Removal
- Instrument Panel Cover - Installation
- Steering Column Opening Cover - Removal
- Steering Column Opening Cover - Installation
- Dimmer Switch
- Door Switch
- Driver/Vehicle Information Display
- Driver / Vehicle Information Display Switch
- Fuel Gauge Sender
- Instrument Cluster / Carrier
- Oil Change Reminder Lamp
- Outside Temperature Display
- Parking Brake Warning Switch
- Relays and Modules - Instrument Panel
- Seat Belt Reminder Lamp
- Sensors and Switches - Instrument Panel
- Shift Indicator - A/T
- Tire Monitoring System
- Technical Service Bulletins
- Lighting and Horns
- Backup Lamp
- Brake Lamp
- Brake Light Switch
- Cargo Lamp
- Center Mounted Brake Lamp
- Courtesy Lamp
- Dimmer Switch
- Dome Lamp
- Door Switch
- Fog/Driving Lamp
- Hazard Warning Lamps
- Headlamp
- Horn
- License Plate Lamp
- Marker Lamp
- Parking Lamp
- Sensors and Switches - Lighting and Horns
- Tail Lamp
- Turn Signals
- Underhood Lamp
- Service Precautions
- Application and ID
- Description and Operation
- Testing and Inspection
- Specifications
- Windows and Glass
- Wiper and Washer Systems
- Check Valve
- Sensors and Switches - Wiper and Washer Systems
- Windshield Washer Hose
- Windshield Washer Pump
- Windshield Washer Reservoir
- Windshield Washer Spray Nozzle
- Wiper Arm
- Wiper Blade
- Wiper Motor
- Wiper Motor Linkage
- Wiper Switch
- Description and Operation
- Testing and Inspection
- Service and Repair
- Specifications
- Application and ID
- Diagrams
- Specifications
- Electrical Specifications
- Mechanical Specifications
- Alignment
- Antitheft and Alarm Systems
- Automatic Transmission/Transaxle
- Battery
- Body and Frame
- Brakes and Traction Control
- Charging System
- Clutch, M/T
- Cooling System
- Differential Assembly
- Drive/Propeller Shaft
- Engine
- Evaporative Emissions System
- Exhaust System
- Flex Plate
- Flywheel
- Fuel Delivery and Air Induction
- Heating and Air Conditioning
- Ignition System
- Lighting and Horns
- Manual Transmission/Transaxle
- Restraints and Safety Systems
- Starting System
- Steering
- Suspension
- Tire Monitoring System
- Tires
- Transfer Case
- Wheel Stud / Lug Nut
- Wheels
- Wiper and Washer Systems
- Pressure, Vacuum and Temperature Specifications
- Capacity Specifications
- Fluid Type Specifications
- Technical Service Bulletins
Diagnostic Trouble Codes
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:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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