CDI Electronics Outboard Ignition Troubleshooting Guide

115 Mercury Troubleshooting Mercury retest. If the problem moves to the other cylinders, the stator is likely bad. If no change, replace all CDMs. A continued no spark condition on the same cylinders indicates a bad trigger. 7. The connection guide below will assist you in locating areas where problems can occur. Remember, a short in either #1, #2 or #3 can cause either # 4, #5 or #6 not to have spark. ENGINE HAS ERRATIC TIMING OR ADVANCED TIMING: 1. Check the trigger magnet in the flywheel to see if it is loose or cracked. 2. Disconnect the 4 wire Detonation Controller and check the DVA voltage on the Black/White wire, reference to engine ground. You should read between 25 and 40 volts. If the voltage is low, replace the TPM Control Module. 3. Replace the TPM Controller. ENGINE HARD TO SHIFT INTO OR OUT OF GEAR: Check the Bias DVA voltage on the Black/White wire, reference to engine ground. You should read between 25 and 40 volts. If the voltage is low, replace the TPM Control Module. ENGINE MIS-FIRES OVER 2000 RPM: 1. Connect a CDM Test Harness (CDI P/N: 511-5207A 1) to the CDM modules and check the DVA voltage from the stator and trigger. A) You should have between 160 and 320 volts on the stator. If the voltage is low, check the stator resistance. If it is high, check the CDM and ground connections. B) The trigger should read between 2 and 8 volts. If the voltage is low, check the trigger resistance. If it is high, check the CDM and ground connections. NOTE: If the stator read low on three cylinder and they share the same color code, swap the stator wires and retest. If the problem moves, replace the stator. If the problem stays on the same CDMs, one of them is defective. 2. Check the DVA voltage on the Black/White wire, reference to engine ground. You should read between 25 and 40 volts. If the voltage is low, replace the TPM Control Module. ENGINE DOUBLE FIRING: 1. Check the Bias DVA voltage on the Black/White wire, reference to engine ground. You should read between 25 and 40 volts. If the voltage is low, replace the TPM Control Module. 2. Swap the CDM that is double-firing with another CDM firing cleanly. If the problem moves, replace the defective CDM. FUEL INJECTORS NOT ACTIVATING: 1. Check the DVA voltage on the Green, Green/White and Green/Red wires, reference to engine ground at cranking speed. You should read at least 8 volts. If the voltage is low, check the voltage on the Purple wire going to the Controller, you should read above 10 volts while cranking the engine. 2. Check the voltage going to the fuel injectors, you should read above 10 volts while cranking the engine. 3. Check the DVA voltage across the fuel injectors, if you see approximately 25-60 volts, the injectors are pulsing. You may have stopped up injectors.