Repair and Diagnosis
- A L L Diagnostic Trouble Codes ( DTC )
- Relays and Modules
- 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 - Engine
- Sensors and Switches - HVAC
- Sensors and Switches - Instrument Panel
- Sensors and Switches - Lighting and Horns
- Sensors and Switches - Powertrain Management
- Sensors and Switches - Computers and Control Systems
- Accelerator Pedal Position Sensor
- Air Flow Meter/Sensor
- Barometric Pressure Sensor
- Camshaft Position Sensor
- Coolant Temperature Sensor/Switch (For Computer)
- Crankshaft Position Sensor
- Fuel Pressure Sensor
- Fuel Tank Pressure Sensor
- Air Temperature Sensor ( Ambient / Intake )
- Knock Sensor
- Manifold Pressure/Vacuum Sensor
- Oxygen Sensor
- Sensors and Switches - Fuel Delivery and Air Induction
- Sensors and Switches - Ignition System
- Sensors and Switches - Computers and Control Systems
- Sensors and Switches - Restraints and Safety Systems
- 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
- Fuses and Circuit Breakers
- Service Reminder Indicators
- Wheels and Tires
- Vehicle Lifting
- Application and ID
Description and Operation
- Service Intervals
- Severe Service Defined
- Supplemental Service Items
- Normal Service
- 10000 MI or 16000 KM
- 20000 MI or 32000 KM
- 30000 MI or 48000 KM
- 40000 MI or 64000 KM
- 50000 MI or 80000 KM
- 60000 MI or 96000 KM
- 70000 MI or 112000 KM
- 80000 MI or 128000 KM
- 90000 MI or 144000 KM
- 100000 MI or 160000 KM
- 110000 MI or 176000 KM
- 120000 MI or 192000 KM
- 130000 MI or 208000 KM
- 140000 MI or 224000 KM
- 150000 MI or 240000 KM
- Engine, Cooling and Exhaust
- Engine
- Access Cover
- 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
- Initial Inspection and Diagnostic Overview
- Symptom Related Diagnostic Procedures
- Symptoms - Engine Mechanical
- Base Engine Misfire With Abnormal Internal Lower Engine Noises
- Base Engine Misfire With Abnormal Valve Train Noise
- Base Engine Misfire With Coolant Consumption
- Base Engine Misfire With Excessive Oil Consumption
- Base Engine Misfire Without Internal Engine Noises
- Coolant In Combustion Chamber
- Coolant In Engine Oil
- Engine Noise on Start-Up, But Only Lasting A Few Seconds
- Engine Noise Under Load
- Engine Will Not Crank - Crankshaft Will Not Rotate
- Lower Engine Noise, Regardless of Engine Speed
- Upper Engine Noise, Regardless of Engine Speed
- Vibration Analysis - Engine
- Vibration Analysis - Engine Balance
- Vibration Analysis - Engine/Accessory Isolation
- Oil Consumption Diagnosis
- Oil Leak Diagnosis
- Component Tests and General Diagnostics
Service and Repair
Specifications
Tools and Equipment
- Cooling System
- Cooling System Air Bleeder Pipe / Hose
- Coolant
- Coolant Level Sensor
- Coolant Line/Hose
- Radiator Cooling Fan
- Engine - Coolant Temperature Sensor/Switch
- Fan Shroud
- Heater Core
- Heater Hose
- Radiator
- Radiator Cap
- Radiator Hose
- Sensors and Switches - Cooling System
- Thermostat
- Turbocharger Coolant Line
- Water Pump
Description and Operation
Testing and Inspection
Service and Repair
Specifications
Tools and Equipment
- Exhaust System
- Engine
- Powertrain Management
- Relays and Modules - Powertrain Management
- Sensors and Switches - Powertrain Management
- Sensors and Switches - Computers and Control Systems
- Accelerator Pedal Position Sensor
- Air Flow Meter/Sensor
- Barometric Pressure Sensor
- Camshaft Position Sensor
- Coolant Temperature Sensor/Switch (For Computer)
- Crankshaft Position Sensor
- Fuel Pressure Sensor
- Fuel Tank Pressure Sensor
- Air Temperature Sensor ( Ambient / Intake )
- Knock Sensor
- Manifold Pressure/Vacuum Sensor
- Oxygen Sensor
- Sensors and Switches - Fuel Delivery and Air Induction
- Sensors and Switches - Ignition System
- Sensors and Switches - Computers and Control Systems
- Tune-up and Engine Performance Checks
- Computers and Control Systems
- Accelerator Pedal Position Sensor
- Air Flow Meter/Sensor
- Air Temperature Sensor ( Ambient / Intake )
- Barometric Pressure Sensor
- Body Control Module
- Camshaft Position Sensor
- Coolant Temperature Sensor/Switch (For Computer)
- Crankshaft Position Sensor
- Electronic Throttle Actuator
- Engine Control Module
- Fuel Pressure Sensor
- Fuel Tank Pressure Sensor
- Information Bus
- Knock Sensor
- Malfunction Indicator Lamp
- Manifold Pressure/Vacuum Sensor
- Oxygen Sensor
- Relays and Modules - Computers and Control Systems
- Sensors and Switches - Computers and Control Systems
- Accelerator Pedal Position Sensor
- Air Flow Meter/Sensor
- Barometric Pressure Sensor
- Camshaft Position Sensor
- Coolant Temperature Sensor/Switch (For Computer)
- Crankshaft Position Sensor
- Fuel Pressure Sensor
- Fuel Tank Pressure Sensor
- Air Temperature Sensor ( Ambient / Intake )
- Knock Sensor
- Manifold Pressure/Vacuum Sensor
- Oxygen Sensor
- Variable Valve Timing Actuator
- Variable Valve Timing Solenoid
Service Precautions
- Application and ID
Testing and Inspection
Diagrams
Specifications
- Emission Control Systems
- Fuel Delivery and Air Induction
- Fuel Pressure
- Fuel Pressure Release
- Accelerator Pedal
- Accelerator Pedal Position Sensor
- Air Cleaner Housing
- Air Flow Meter/Sensor
- Fuel
- Fuel Filter
- Fuel Injector
- Fuel Line Coupler
- Fuel Pressure Test Port
- Fuel Pump
- Fuel Rail
- Fuel Supply Line
- Fuel Tank
- Fuel Tank Unit
- Intake Air Duct
- Relays and Modules - Fuel Delivery and Air Induction
- Sensors and Switches - Fuel Delivery and Air Induction
- Throttle Body
- Turbocharger
Service Precautions
Description and Operation
Testing and Inspection
Service and Repair
- Ignition System
- Transmission Control Systems
Specifications
Tools and Equipment
- Transmission and Drivetrain
- Automatic Transmission/Transaxle
- Control Module
- Fluid - A/T
- Fluid Line/Hose
- Fluid Pan
- Relays and Modules - A/T
- Seals and Gaskets
- Sensors and Switches - A/T
- Shifter A/T
- Shift Linkage
- Torque Converter
- Transmission Mode Switch
- Transmission Mount
- Transmission Temperature Sensor/Switch
- Valve Body
- Wiring Harness
- Application and ID
Description and Operation
Testing and Inspection
Service and Repair
Specifications
Tools and Equipment
- Clutch
- Differential Assembly
- Drive Axles, Bearings and Joints
- Flex Plate
- Flywheel
- Manual Transmission/Transaxle
- Relays and Modules - Transmission and Drivetrain
- Sensors and Switches - Transmission and Drivetrain
- Transmission Control Systems
Service Precautions
- Automatic Transmission/Transaxle
- Brakes and Traction Control
- Antilock Brakes / Traction Control Systems
- Brake Bleeding
- Brake Pedal Assy
- Brake Warning Indicator
- 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
Testing and Inspection
- Starting and Charging
- Battery
- Charging System
- Starting System
- Power and Ground Distribution
- Auxiliary Power Outlet
- Circuit Breaker
- Fuse
Diagrams
- Diagram Information and Instructions
- Diagnostic Aids
- Electrical Diagrams
- Ground Distribution
- Power Moding
- Power Supply, Ground and Serial Data - With Electrical Centre
- Power Supply, Ground and Serial Data - Without Electrical Centre
- Power, Ground, and Serial Data Communications
- Power, Ground, and Video Signals (UWG)
- Power, Ground, Antennas, and Serial Data
- Supply, Ground, Serial Data, Rear Sensors and Control Module (UD5 or UDP)
Service Precautions
- Power and Ground Distribution
- Auxiliary Power Outlet
- Circuit Breaker
- Fuse
Diagrams
- Diagram Information and Instructions
- Diagnostic Aids
- Electrical Diagrams
- Ground Distribution
- Power Moding
- Power Supply, Ground and Serial Data - With Electrical Centre
- Power Supply, Ground and Serial Data - Without Electrical Centre
- Power, Ground, and Serial Data Communications
- Power, Ground, and Video Signals (UWG)
- Power, Ground, Antennas, and Serial Data
- Supply, Ground, Serial Data, Rear Sensors and Control Module (UD5 or UDP)
- Steering and Suspension
- Alignment
- Relays and Modules - Steering and Suspension
- Sensors and Switches - Steering and Suspension
- Steering
- Front Steering Knuckle
- Power Steering
- Relays and Modules - Steering
- Steering Column
- Steering Gear
- Steering Mounted Controls Assembly
- Steering Shaft
- Steering Wheel
- Tie Rod
Service Precautions
Description and Operation
Testing and Inspection
Specifications
- Suspension
- Ball Joint
- Control Arm
- Cross-Member
- Front Steering Knuckle
- Rear Knuckle
- Rear Knuckle Alignment Link
- Relays and Modules - Suspension
- Sensors and Switches - Suspension
- Stabilizer Bar
- Subframe
- Suspension Control ( Automatic - Electronic )
- Suspension Spring ( Coil / Leaf )
- Suspension Strut / Shock Absorber
- Trailing Arm
- Wheel Bearing
- Wheel Hub
Description and Operation
Testing and Inspection
Specifications
Tools and Equipment
- Wheels and Tires
Service Precautions
- Application and ID
Tools and Equipment
- Heating and Air Conditioning
- Air Door
- Air Duct
- Air Register
- Blower Motor
- Cabin Air Filter / Purifier
- Cabin Temperature Sensor / Switch
- Climate Control Exhaust Gas Sensor
- Compressor HVAC
- Condenser HVAC
- Control Assembly
- Coupler HVAC
- Discharge Air Temperature Sensor / Switch
- Evaporator Case
- Evaporator Core
- Expansion Valve
- Heater Core
- Heater Hose
- High Pressure Safety Valve HVAC
- Hose/Line HVAC
- Housing Assembly HVAC
- Humidity Sensor
- Receiver Dryer
- Refrigerant
- Refrigerant Pressure Sensor / Switch
- Sensors and Switches - HVAC
Service Precautions
Description and Operation
Testing and Inspection
- Symptom Related Diagnostic Procedures
- Air Conditioning Compressor Malfunction
- Air Recirculation Malfunction
- Air Temperature Malfunction
- Auxiliary Air Temperature Malfunction
- Auxiliary Blower Motor Malfunction
- Blower Motor Malfunction
- Fuel Operated Heater Malfunction
- Fuel Operated Heater Remote Control Malfunction
- Symptoms - Heating, Ventilation, and Air Conditioning
- Symptoms - HVAC Systems - Automatic
- Component Tests and General Diagnostics
- Programming and Relearning
- Symptom Related Diagnostic Procedures
Locations
Service and Repair
Diagrams
Specifications
Tools and Equipment
- Restraints and Safety Systems
- Repairs and Inspections Required After a Collision
- Air Bag Systems
- Air Bag
- Clockspring Assembly / Spiral Cable
- Impact Sensor
- Seat Position Sensor
- Malfunction Lamp / Indicator
Service Precautions
Description and Operation
Testing and Inspection
Locations
Service and Repair
Diagrams
Tools and Equipment
- Head Restraint System
- Seat Belt Systems
- Sensors and Switches - Restraints and Safety Systems
Service Precautions
- Hazardous Materials Handling and Disposal
- Technician Safety Information
- Safety Regulations For Electrical/Electronic Systems
- SIR Deployed Inflator Modules Are Hot Warning
- SIR Inflatable Module Deployment Outside Vehicle Warning
- SIR Inflator Module Disposal Warning
- SIR Inflator Module Handling and Storage Warning
- SIR Seatbelt Pretensioner Handling Warning
- Servicing the SIR System Warning
- SIR Special Tool Warning
- SIR Warning
Specifications
- Accessories and Optional Equipment
- Antitheft and Alarm Systems
- Cellular Phone
- Collision Avoidance and Parking Assist Systems
- Driver/Vehicle Information Display
- Entertainment Systems
- Garage Door Opener Transmitter
- Navigation System
- Radio, Stereo, and Compact Disc
- Relays and Modules - Accessories and Optional Equipment
- Sensors and Switches - Accessories and Optional Equipment
- Steering Mounted Controls Assembly
- Towing / Trailer System
- Trailer Connector
- Body and Frame
- Repairs and Inspections Required After a Collision
- Body Control Systems
- Access Cover
- Bumper
- Doors, Hood and Trunk
- Doors
- Front Door
- Rear Door
Description and Operation
- Fuel Door
- Hood
- Trunk / Liftgate
Testing and Inspection
Locations
- Doors
- Exterior Moulding / Trim
- Fender
- Frame
- Grille
- Interior Moulding / Trim
- Locks
- Door Locks
- Keyless Entry
- Power Locks
Diagrams
- Mirrors
- Paint, Striping and Decals
- Radiator Support
- Relays and Modules - Body and Frame
- Roof and Associated Components
- Luggage / Roof Rack
- Sunroof / Moonroof
- Sun Shade
- Sunroof / Moonroof Motor
- Sunroof / Moonroof Switch
- Sunroof / Moonroof Windguard
- Sunroof / Moonroof Drain
- Sunroof / Moonroof Frame
- Sunroof / Moonroof Module
- Sunroof / Moonroof Weatherstrip
Description and Operation
Testing and Inspection
Adjustments
Locations
Service and Repair
Diagrams
Specifications
- Seats
- Head Rest
- Head Restraint System
- Power Seat Control Module
- Power Seat Motor
- Power Seat Switch
- Seat Back
- Seat Cushion
- Seat Fan
- Seat Temperature Element
- Seat Temperature Control Module
Description and Operation
Testing and Inspection
Locations
Service and Repair
- Driver or Passenger Seat Adjuster Finish Cover Replacement (Lower 8-Way Power)
- Driver or Passenger Seat Adjuster Finish Cover Replacement (4/6-Way Hybrid, 6-Way Hybrid Sport)
- Driver or Passenger Seat Adjuster Finish Cover Replacement (8-Way Power)
- Driver or Passenger Seat Adjuster Finish Cover Retainer Replacement (4-Way Hybrid, 6- Way Hybrid Sport)
- Driver or Passenger Seat Adjuster Finish Cover Retainer Replacement (8-Way-Power)
- Driver or Passenger Seat Adjuster Handle Replacement (2/4/6-Way Hybrid, 6-Way Hybrid Sport)
- Driver or Passenger Seat Inner Recliner Finish Cover Replacement (2/4/6-Way Hybrid, 6-Way Hybrid Sport)
- Driver or Passenger Seat Inner Recliner Finish Cover Replacement (8-Way-Power)
- Driver or Passenger Seat Outer Adjuster Finish Cover Replacement (2/4/6-Way Hybrid, 6-Way Hybrid Sport)
- Driver or Passenger Seat Outer Adjuster Finish Cover Replacement (8-Way-Power)
- Driver or Passenger Seat Recliner Lever Replacement
- Driver or Passenger Seat Replacement (2/4/6-Way Hybrid, 6-Way Hybrid Sport)
- Driver or Passenger Seat Replacement (8-Way-Power)
- Driver Seat Wiring Harness Replacement (Driver or Passenger Seat 8-Way Power)
- Front Seat Adjuster Track Finish Cover Replacement (2/4/6-Way Hybrid, 6-Way Hybrid Sport)
- Front Seat Adjuster Track Finish Cover Replacement (8-Way-Power)
- Front Seat Recliner Actuator Shaft Replacement (Lower - 8-Way-Power)
- Front Seat Recliner Control Replacement (Driver or Passenger Seat 2 and 4-Way)
- Front Seat Recliner Knob Replacement (8-Way-Power - Lower)
- Rear Compartment Access Door Replacement
- Rear Seat Armrest Replacement
- Rear Seat Replacement (Back 40 Percent)
- Rear Seat Replacement (Back 60 Percent)
- Rear Seat Shoulder Belt Guide Opening Bezel Replacement
- Rear Seat Shoulder Belt Opening Cover Replacement
Diagrams
Specifications
- Sensors and Switches - Body and Frame
- Spoilers, Flaps, and Air Dams
- Towing Hook / Bracket
- Weatherstrip
Service Precautions
Testing and Inspection
- Air/Wind Noise
- Squeaks and Rattles
- Vibration
- Symptoms - Vibration Diagnosis and Correction
- Vibration Analysis - Road Testing
- Vibration Diagnosis, Starting Point, and Correction
- Vibration Diagnostic Aids
- Vibration Diagnostic Aids - Vibration Duplicated, Appears to Be Potential Operating Characteristic
- Vibration Diagnostic Aids - Vibration Duplicated, Component Not Identified
- Vibration Diagnostic Aids - Vibration Duplicated, Difficult to Isolate/Balance Component
- Vibration Diagnostic Aids - Vibration Intermittent or Not Duplicated
- Vibration Theory and Terminology
- Water Leaks
Specifications
- Cruise Control
- Instrument Panel, Gauges and Warning Indicators
- Brake Warning Indicator
- Dashboard / Instrument Panel
- Door/Trunk Ajar Indicator/Lamp
- Driver/Vehicle Information Display
- Fuel Gauge Sender
- Malfunction Indicator Lamp
- Oil Change Reminder Lamp
- Oil Pressure Sender
- Outside Temperature Display
- Seat Belt Reminder Lamp
- Sensors and Switches - Instrument Panel
- Tire Monitoring System
Service Precautions
Diagrams
- Lighting and Horns
- Ambient Light Sensor
- Backup Lamp
- Brake Lamp
- Center Mounted Brake Lamp
- Courtesy Lamp
- Fog/Driving Lamp
- Headlamp
- Horn
- License Plate Lamp
- Marker Lamp
- Sensors and Switches - Lighting and Horns
- Tail Lamp
- Turn Signals
Service Precautions
Diagrams
- Diagram Information and Instructions
- Diagnostic Aids
- Electrical Diagrams
- Windows and Glass
- Rear Defogger
- Sensors and Switches - Windows and Glass
- Windows
- Windshield
Service Precautions
Description and Operation
Testing and Inspection
Locations
- Wiper and Washer Systems
Service Precautions
- Technician Safety Information
- Assistant Driving Warning
- Cleaning Solvent Warning
- Definition of Danger, Warning, Caution, and Note
- Eye Protection Warning
- Fastener Caution
- Moving Parts and Hot Surfaces Warning
- Protective Goggles and Glove Warning
- Road Test Warning
- Safety Glasses and Compressed Air Warning
- Safety Glasses Warning
- Safety Regulations For Electrical/Electronic Systems
- Work Stall Test Warning
- Vehicle Damage Warnings
- Technician Safety Information
- Application and ID
Description and Operation
Testing and Inspection
- Initial Inspection and Diagnostic Overview
- Symptom Related Diagnostic Procedures
- Air/Wind Noise
- Waterleaks
- Vibration
- Description and Operation
- Diagnostic Related Diagnostic Procedures
- Vibration Analysis - Road Testing
- Vibration Diagnosis, Starting Point, and Correction
- Vibration Diagnostic Aids
- Vibration Diagnostic Aids - Vibration Duplicated, Appears to Be Potential Operating Characteristic
- Vibration Diagnostic Aids - Vibration Duplicated, Component Not Identified
- Vibration Diagnostic Aids - Vibration Duplicated, Difficult to Isolate/Balance Component
- Vibration Diagnostic Aids - Vibration Intermittent or Not Duplicated
- Squeaks and Rattles
Locations
Service and Repair
Diagrams
- Diagram Information and Instructions
- Diagnostic Aids
- Electrical Diagrams
- Power and Ground Distribution
- System Diagram
- Ground Distribution
- Power Moding
- Power Supply, Ground and Serial Data - With Electrical Centre
- Power Supply, Ground and Serial Data - Without Electrical Centre
- Power, Ground, and Serial Data Communications
- Power, Ground, and Video Signals (UWG)
- Power, Ground, Antennas, and Serial Data
- Supply, Ground, Serial Data, Rear Sensors and Control Module (UD5 or UDP)
- Auxiliary Power Outlet
- Circuit Breaker
- Fuse
- F1DA
- F1UA
- F2DA
- F2UA
- F3DA
- F4DA
- F5DA
- F5UA
- F6DA
- F7DA
- F8DA
- F8UA
- F9DA
- F9UA
- F10DA
- F10UA
- F11DA
- F11UA
- F12RA
- F13UA
- F14DA
- F15DA
- F16DA
- F16UA
- F17DA
- F17UA
- F19DA
- F19UA
- F20DA
- F20UA
- F21DA
- F21UA
- F22DA
- F22UA
- F23DA
- F23RA
- F24DA
- F24UA
- F25DA
- F26DA
- F26UA
- F27UA
- F28UA
- F29RA
- F29UA
- F30RA
- F30UA
- F31RA
- F32RA
- F33RA
- F33UA
- F34RA
- F34UA
- F35RA
- F35UA
- F37UA
- F38UA
- F41UA
- F45UA
- F46UA
- F47UA
- F48UA
- F49UA
- F50UA
- F51UA
- F53UA
- F54UA
- F55UA
- F56UA
- F57UA
- F60UA
- F62UA
- F64UA
- F67UA
- F69UA
- F70UA
- X50A Electrical centre, engine compartment - B+ Bus (1 of 3)
- X50A Electrical centre, engine compartment - B+ Bus (2 of 3)
- X50A Electrical centre, engine compartment - B+ Bus (3 of 3)
- X50D Additional Electrical Centre, Battery
- System Diagram
- Air Bag Systems
- Antitheft and Alarm Systems
- Cellular Phone
- Charging System
- Collision Avoidance and Parking Assist Systems
- Computers and Control Systems
- Cruise Control
- Entertainment Systems
- Heating and Air Conditioning
- Instrument Panel, Gauges and Warning Indicators
- Lighting and Horns
- System Diagram
- Brake Lamp
- Center Mounted Brake Lamp
- Courtesy Lamp
- Fog/Driving Lamp
- Headlamp
- Horn
- License Plate Lamp
- Marker Lamp
- Tail Lamp
- Turn Signal Lamp
- Locks
- Mirrors
- Navigation Display
- Radio, Stereo, and Compact Disc
- Seat Belt Systems
- Seats
- Starting System
- Steering Mounted Controls Assembly
- Sunroof / Moonroof
- Trailer Connector
- Windows
- Wiper and Washer Systems
- Power and Ground Distribution
- Splices
- Harness
Specifications
- Electrical Specifications
- Mechanical Specifications
- Alignment
- Antilock Brakes / Traction Control Systems
- Automatic Transmission/Transaxle
- Body and Frame
- Clutch, M/T
- Cooling System
- Disc Brake System
- Drive Axles, Bearings and Joints
- Engine
- Exhaust System
- Flex Plate
- Flywheel
- Heating and Air Conditioning
- Manual Transmission/Transaxle
- Parking Brake System
- Powertrain Management
- Restraints and Safety Systems
- Steering
- Suspension
- Wheels and Tires
- Window Regulator
- Pressure, Vacuum and Temperature Specifications
- Capacity Specifications
- Fluid Type Specifications
Tools and Equipment
Diagnostic Trouble Codes