Section 3 (Engine Controls - System/Component Tests - 6.5L Diesel)

• Model Identification
  • Notes
  • Terminology
• Introduction
• Air Induction Systems
  • Turbocharger
• Computerized Engine Controls
  • Control Unit
    • Notes
    • Ground Circuits
    • Power Circuits
• Engine Sensors & Switches
  • Engine Controls - System/Component Tests - 6.5L Diesel
    • A/C ON Switch/System Test
    • Brake Switch
    • Engine Coolant Temperature (ECT) Sensor
    • Intake Air Temperature (IAT) Sensor
    • Manifold Absolute Pressure (MAP) Sensor
    • Oxygen Sensor
    • Oxygen Sensor Heating Element
    • Park/Neutral (P/N) Switch
    • Throttle Position (TP) Sensor
    • Vehicle Speed Sensor (PM Generator)
• Relays, Solenoids, Motors & Modules
  • Relays
    • A/C Relays
    • Fuel Pump Relay
  • Solenoids
    • Notes
    • Electronic Air Control (EAC) Solenoid
    • EGR Control Solenoid
    • Torque Converter Clutch (TCC) Solenoid
• Fuel System
  • Notes
  • Important Preliminary Checks
    • Notes
    • Visual and Physical Checks
    • Symptom
  • Hard Start
    • Notes
    • Preliminary Checks
    • Sensor Checks
    • Fuel System Checks
    • Electrical System Checks
    • Air Intake System Checks
    • Exhaust System Check
    • Engine Mechanical Checks
    • Additional Checks
  • Normal Glow Plug Circuit Operation
  • Preliminary Glow Plug Diagnosis
  • Inhibit Switch (Black Cap)
  • Glow Plug System Diagnosis
    • Electrical Check
  • Glow Plug Controller
  • Injection Pump Housing Leakage Test
  • Injectors
    • Test Preparation
    • Opening Pressure Test
    • Leakage Test
    • Chatter Test
    • Spray Pattern Test
• Emission Systems & Sub-Systems
  • Positive Crankcase Ventilation
    • Crankcase Depression Regulator (CDR)
  • Exhaust Gas RECIRCULATION (EGR)
    • EGR Valve Check
  • Vacuum Pump
• Miscellaneous ECM Controls
  • Notes
  • Transmission (C-8)
    • Torque Converter Clutch (TCC) Solenoid
    • Converter Lock-Up Signal At Transmission
    • Converter Lock-Up Signal From ECM
    • Shift Light (Manual Transmission)
  • A/C Clutch (C-10)
    • A/C Clutch Relay
  • Cooling Fan (C-12)
    • Notes
    • Cooling Fan Relay
    • Cooling Fan Motor
• Diagnostic Charts
  • A/C Request Signal Circuit Diagnosis
  • Auxiliary Cooling Fan Circuit Diagnosis
• Component Locations
• Wiring Diagrams
  • Blazer, Pickup, Sierra, Suburban & YUKON With M/T
  • Blazer, Pickup, Sierra, Suburban & YUKON With 4L60-E
  • Blazer, Pickup, Sierra, Suburban & YUKON With 4L80-E
  • "P" Series Commercial Van - VIN F With 4L80-E
  • "P" Series Commercial Van - VIN Y With 4L80-E
  • "G" Series Van - VIN P With 4L60-E
  • "G" Series Van - VIN Y With 4L80-E