1996 Johnson Evinrude "ED" 90 LV 125C, 130, 200, 225, 250 Service Manual, P/N 507128, Page 168Get this manual
STEPSENSOR COIL TEST Ground Test
1Disconnect the two 4-pin Amphenol connectors between the timer base and power pack
2Set peak-reading voltmeter to "POS" and "5", "SEN" and "5" on Stevens CO-77 meter
[m 3Alternately, connect voltmeter between
each timer base terminal and clean engine groundCrank engine and observe meter at each connection Any reading indicates sensor coils or leads are grounded Locate and repair ground, or replace timer base4If no reading is indicated in Step 3, go to Output TestOutput Test
1Set peak-reading voltmeter to "POS" and "5", "SEN" and "5" on Stevens CO-77 meter
[11] 2Attach voltmeter black lead to port timer base connector, terminal "0"Alternately, attach meter red lead to starboard connector, terminals "A", "B", and "C", and port connector, terminals "A", "8", and "C"3Crank engine and observe meter at each connection If meter shows 0.2 volt or higher, go to Step If meter shows less than 0.2 volt, check condition of wiring and connectors If wiring and connector condition is good, go to Ohmmeter Test4Connect the "0" terminals in the separated port timer base connector using jumper wireConnect the "0" terminals in the separated starboard timer base connector using jumper wire5Attach the voltmeter black lead to clean engine groundAttach meter red lead alternately to starboard connector, terminals "A", "8", and "C", and port connector, terminals "A", "B", and "C"6Crank engine and observe meter at each connection If meter shows 0.8 volt or higher, go to STEPPOWER PACK TEST If meter shows less than 0.8 volt, check condition of wiring and connectors If wiring and connector condition is good, replace timer base