Diagnostic Modes: Notes

Self-diagnostic system can detect ECCS malfunctions and store related trouble codes. Trouble codes, including intermittent codes, are stored in ECU memory and are available for interpretation unless codes have been cleared.

Self-diagnostic system uses dual Light Emitting Diodes (LEDs), located on ECU.

Self-diagnostic system can be operated in any of 5 modes. Modes are manually changed using screwdriver through access port on ECU. With screwdriver turned fully clockwise, inspection lights will begin to flash. Count number of flashes. First flash is mode I, second flash is mode II, etc. When desired mode has been indicated, turn screwdriver fully counterclockwise. In different modes, red and green LEDs perform different functions.