Engine Will Not Start

Check the battery. See BASIC TESTING article in ENGINE PERFORMANCE section.
Check starting system. See BASIC TESTING article in ENGINE PERFORMANCE section.
Check fuel pressure. See BASIC TESTING article.
Check ignition wires, ignition coil and Ignition Control Module (ICM). See BASIC TESTING article.
Check PGM-FI main relay. See SYSTEM/COMPONENT TESTS article.
Check for low engine compression.
Check for intake system air leaks.
Check for a seized engine.
Check for a slipped/broken timing belt.
Check for contaminated fuel.
Check A/T gear position signal (A/T) or clutch switch signal (M/T). See SYSTEM/COMPONENT TESTS article.
Test PCM power and ground circuits. See MALFUNCTION INDICATOR LIGHT (MIL) in TESTS W/CODES - INTRODUCTION article.
Check Crankshaft Position (CKP), Top Dead Center (TDC), Cylinder Position (CYP) and/or Crankshaft Speed Fluctuation (CKF) sensors. See Diagnostic Trouble Code (DTC) in TESTS W/CODES - INTRODUCTION article.
On Accord & Prelude, engine will not start if Immobilizer has not been deactivated or PCM has been replaced and immobilizer code has not been rewritten to new PCM using a Honda PGM Tester. See ANTI-THEFT SYSTEMS article in ACCESSORIES/SAFETY EQUIPMENT section.