Engine Controls - Basic Testing

• Introduction
• General Motors A & C Chart Reference
• Preliminary Inspection & Adjustments
  • Visual Inspection
  • Mechanical Inspection
    • Compression
    • Exhaust System Backpressure
  • ECM Replacement Check
• No Start Diagnosis (A-3)
  • Notes
  • Engine Controls - Basic Testing
    • Definition
  • No Start - Engine Cranks OK (1.9L SATURN)
    • Notes
    • General Inspection
    • Ignition System
    • Fuel System
  • No Start - Engine Cranks OK (PFI & TBI W/HEI Distributor, Except 4.9L CADILLAC)
    • Notes
    • General Inspection
    • Ignition System
    • Fuel System (TBI)
    • Fuel System (PFI)
  • No Start - Engine Cranks OK (4.9L CADILLAC W/HEI Distributor)
    • Notes
    • General Inspection
    • Ignition System
    • Fuel System
  • No Start - Engine Cranks OK (2.5L TBI W/Dis)
    • Notes
    • General Inspection
    • Ignition System
    • Fuel System
  • No Start - Engine Cranks OK (2.0L Port Fuel Injection W/Dis)
    • Notes
    • General Inspection
    • Ignition System
  • No Start - Engine Cranks OK (2.2L Port Fuel Injection W/Dis)
    • Notes
    • General Inspection
    • Ignition System
  • No Start - Engine Cranks OK (3.1L & 3.4L PFI W/Dis)
    • Notes
    • General Inspection
    • Ignition System ("J" & "L" Bodies)
    • Ignition System ("W" Body)
  • No Start - Engine Cranks OK (2.3L PFI W/IDI)
    • Notes
    • General Inspection
    • Ignition System
  • No Start - Engine Cranks OK (PFI W/C3I)
    • Notes
    • General Inspection
    • 3.3L Achieva, Grand Am & Skylark
    • 3.3L; Century, Cutlass Ciera & Cutlass Cruiser
    • Ignition System (3.8L W/Type I Coil Pack)
    • Ignition System (3.8L W/Type II Coil Pack)
  • No Start - Engine Cranks OK (Corvette OPTI-Spark)
    • General Inspection
    • Ignition System
• Basic Fuel System Checks (A-7)
  • Notes
  • Fuel System Pressure Test (Except SATURN)
    • Fuel Pressure Relief (TBI)
    • Fuel Pressure Relief (PFI)
    • Fuel Pressure Check (TBI)
    • Fuel Pressure Check (PFI)
    • Fuel Pump Relay
    • Fuel Pump Relay By-Pass Procedure
  • Fuel System Pressure Test (SATURN)
    • Fuel Pressure Relief (TBI & PFI)
    • Fuel Pressure Check (TBI)
    • Fuel Pressure Check (PFI)
    • Fuel Pump Relay
    • Fuel Pump Relay By-Pass Procedure
  • Field Service Mode Check (Except PFI CADILLAC)
• Basic Ignition System Checks (C-4)
  • HEI-EST DISTRIBUTOR (3.1L - VIN D, 4.3L, 4.6L, 4.9L, 5.0L, 5.7L - VINs K, 7 And 8, And 7.4L)
    • Notes
    • Spark
    • Ignition Coil Power Source
    • Ignition Coil Resistance (Externally Mounted)
    • Ignition Coil Resistance (Internally Mounted)
    • Distributor Pick-Up Coil Short & Resistance Checks
    • Tach Pulse (RPM) Signal
    • Hall Effect Switch (4.9L Cadillac)
  • Dis (1.9L, 2.0L, 2.2L, 2.5L, 3.1L - VIN T & 3.4L)
    • Spark
    • Ignition Coil Power Source
    • Ignition Coil Resistance (Except 1.9L)
    • Ignition Coil Resistance (1.9L)
    • Crankshaft Sensor Pick-Up Coil Short & Resistance Checks
    • Crank Angle Sensor Signal
    • Tach Pulse (RPM) Signal
  • IDI (2.3L)
    • Spark
    • Ignition Coil Power Source
    • Ignition Coil Resistance
    • Crankshaft Sensor Pick-Up Coil Short & Resistance Checks
    • Crank Angle Sensor Signal
    • Tach Pulse (RPM) Signal
  • C3I (3.3L & 3.8L)
    • Spark
    • Ignition Coil Power Source
    • Ignition Coil Resistance
    • Tach Pulse (RPM Reference) Signal
  • Corvette OPTI-Spark (5.7L VIN P)
    • Spark
    • Ignition Coil Power Source
    • Ignition Coil Resistance
    • Tach Pulse (RPM Reference) Signal
• Idle Speed & Ignition Timing
• Diagnostic Circuit Check (Except PFI CADILLAC)
  • Notes
  • A1, Service Engine Soon Light Inoperative
  • A2, Service Eng. Soon Light On Steady Or Won't Flash Code 12
• Summary