Honda BF115A, BF130A Outboard Motors Shop Manual., Page 91Get this manual
HONDA 4TROUBLESHOOTING
The ECM (Engine Control Module) has the self-diagnosis function which turns the MIL (Malfunction Indicator Lamp) ON when it detects an abnormality with the inputloutput systemShort-circuit the service check connector when then MIL is ONThe MIL should blink indicating the probable problem part by the number and length of the blinksWhen multiple problems occur simultaneously, the MIL can indicate them by blinking separate codes, one after anotherCodes 10 and after are indicated by series of long and short blinksThe number of long blinks equals the first digit and the number of short blinks equals the second digitWhen the overheat sensor is faulty, the overheat light as well as the MIL should blink simultaneouslyIf the ECM body is faulty, the MIL turns ON and it stays ON when the service check connector is short-circuitedIf the MIL blinks by short-circuiting the service check connector, detect the probable problem part by referring to the Troubleshooting Guide on page 5-10, and troubleshoot following the troubleshooting flow chartObserve the following instruction when using the troubleshooting flow chartILighting and blinking procedure of MIL