Ignition Timing Inspection
  1. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC).
  1. Turn the ignition switch to ON (II).
  1. Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain control module (PCM). If it doesn't communicate, troubleshoot the DLC circuit.
  1. Start the engine. Hold the engine speed at 3,000 rpm (min −1 ) with no load (in P or N (A/T model) or neutral (M/T model)) until the radiator fan comes on, then let it idle.
  1. Check the idle speed.
  1. Jump the SCS line with the HDS.
  1. Connect the timing light to the No. 1 ignition coil harness.