2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 277Get this manual
Ignition and ignition control system Checking the ECM
1Remove the ignition coil cover and disconnect the ignition coil coupler2Connect the test harness (2 pins) to the ignition coil3Measure the ECM output peak voltageIf below specification, measure the pulser coil output peak voltageReplace the ECM if the output peak voltage of the pulser coil is above specificationS69J8190
3Measure the pulser coil output peak voltageReplace the pulser coil if below specification
Digital multimeter: YU-34899-A Peak voltage adaptor: YU-39991 Test harness (4 pins): YB-06771 Pulser coil output peak voltage: Whitered (WR) Black (B) Whiteblack (WB) Black (B) Whitegreen (WG) Black (B) rmin
S69J8180
Unloaded Cranking 5.3 5.3
Loaded 1,500 20 3,500 43