OUTPUT OF DIAGNOSTIC CODE 1. Turn the ignition switch and OD switch ON. Do not start the engine. 2. Using a service wire, short the DG terminal and body ground. 3. Read the diagnostic code as indicated by the number of flashes of the "OD OFF light". Diagnostic Codes Indication (a) If the system is operating normally (no malfunction), the light will blink once every 0.25 seconds. (b) In event of a malfunction, the light will blink once every 0.5 seconds. The first number of blinks will equal the first digit of a two digit diagnostic code. After a 1.5 seconds pause, the 2nd number of blinks will equal the 2nd number of a two digit diagnostic code. If there are two or more codes, there will be a 2.5 seconds pause between each. 0.25 seconds ON OFF 0.25 seconds 0.5 seconds 2.5 seconds For Next Code ON OFF 4.0 seconds 1.5 seconds 4.5 seconds Repeat