CDI Electronics Outboard Ignition Troubleshooting Guide

148 TROUBLESHOOTING GUIDE - Yamaha Troubleshooting Yamaha Troubleshooting 4. Check the resistance and DVA output of the Stator and Trigger: Read from Read to OEM Reading DVA (connected) DVA (Disconnected) White/Red Trigger wire White/Black wire 260-360 ohms 2.5 V Minimum 4.5 V Minimum Brown Stator wire Blue Stator wire 136-204 ohms 150 V Minimum 120 V Minimum Black//Orange (#1) Engine Ground - 105 V Minimum Black/White (#2) Engine Ground - 0 V Minimum (at idle) Black/Yellow (#3) Engine Ground - 105 V Minimum NOTE: The #2 Cylinder is triggered by the ignition pack, it is normal for it to have no fire at cranking or idling. All cylinders should fire at 1500 RPM. 5. Check the cranking RPM. A cranking speed of less than 250-RPM may not allow the system to fire properly. NO SPARK OR INTERMITTENT ON ONE OR MORE CYLINDERS: 1. Check the resistance and DVA output: Read from Read to OEM Reading DVA (connected) DVA (Disconnected) White/Red Trigger wire White/Black wire 260-360 ohms 2.5 V Minimum 4.5 V Minimum Blue/Red (Crank Position Sensor) Blue/White 136-204 5 V Minimum Black/Orange Engine Ground - 125 V Minimum Black/White Engine Ground - 0 V (at idle) Black/Yellow Engine Ground - 125 V Minimum Coil High Tension Lead Black 3.28K-4.92K NOTE: The #2 Cylinder is triggered by the ignition pack, it is normal for it to have no fire at cranking or idling. All cylinders should fire at 1500 RPM. 2. Swap the coils. If the problem moves to the other cylinder, replace the coil. If the problem stays on the cylinder, re-check the trigger coils. ENGINE WILL NOT ACCELERATE ABOVE APPROXIMATELY 2000 RPM: 1. Verify the engine is not overheating and causing the power pack to limit the RPM. 2. Disconnect the Pink wire from the power pack and retest. If the engine now performs correctly, check the overheat sensor, oil level in the oil tank mounted on the engine and the wiring harness. 3. Check the position of the Pink wire and make sure it is not next to a spark plug wire. 4. Verify the ignition timing is advancing to the WOT setting (24-28 Degrees BTDC). ENGINE WILL NOT ACCELERATE ABOVE APPROXIMATELY 2500 RPM: 1. Using an inductive tachometer, check the RPM on all cylinders. A difference in readings between the individual cylinders can be caused by a bad coil, power pack or spark plug. 2. If all cylinders show the same RPM and the engine will only rev to approximately 2500 RPM, check the running stator DVA output from idle thru WOT. You should show an increase in voltage on the Blue to the Brown stator wire, stabilizing over 2000 RPM and showing a slight decrease over 5000 RPM. A sharp drop in voltage can be the result of a bad stator coil or a bad pack. HIGH SPEED MISS: 1. Verify the engine is not overheating and causing the problem. 2. Using an inductive tachometer, check the RPM on all cylinders. A difference in readings between the individual cylinders can be caused by a bad coil, power pack or spark plug. S.A.F.E. WILL NOT ENGAGE: Disconnect the Pink warning wire from the power pack. Connect a jumper wire to engine ground and connect it to the Pink wire from the power pack (If it still fails to engage, the power pack is likely bad). If the engine now limits at approximately 2000 RPM, check the wiring from the temperature sensor and oil tank to the power pack. ENGINE WILL NOT STOP RUNNING: Short the White wire from the CD Module to engine ground. If the engine stops, the problem is in the stop circuit. If the engine continues to run with the White wire shorted to engine ground, replace the defective CD Module.