1999 "EE" Evinrude 70HP 4-Stroke Service Manual, P/N 787023, Page 93Get this manual
CTP Switch Resistance Test
1Disconnect the CTP switch leadConnect an ohmmeter between the switch terminal and groundReplace switch if it fails this test Button extendedinfinity (00Button depressedcontinuity (00) 2Install new switch, connect lead harness, and verify operation using CIVIC Diagnostic Software
Cam and Crank Position Sensors
See the Ignition System section for information on these sensors
lAC Valve
The lAC is controlled by the ECU to maintain steady 700 RPM idleNormal duty cycle is 20 5Incorrect duty cycle is affected by anything that influences idle RPMThis can include vacuum leak, uneven cylinder operation (caused by misfiring spark plug, failed fuel injector, or misadjusted or burned valves), misadjusted idle air screw, and plugged lAC air inlet hose or mufflerVerify that the engine is mechanically sound before adjusting or troubleshooting the lAC valvelAC Valve Function Test