Toggle ThumperTalk Messages
Enter to DAILY to win MXGP2!
MXGP 2 is now available on the PC, Xbox One and PS4. In celebration of the game's release, Racing Game Central is giving away digital copies for the Xbox One, PS4 and PC. CLICK HERE TO ENTER
'03 WR450 CDI ignition coil voltage
Posted September 09, 2009 - 06:25 AM
I've gone thru the ignition test procedure in service manual and everything measures withing spec, indicating a bad CDI. I've triple checked for loose connections, confirmed that the CDI is recieiving 12 volts and has continuity to ground. No change if stop switch, neutral swith, or TPS are disconnected.
One piece of information I am missing is the CDI voltage to the ignition coil. With the main switch on, I measure approx 5.2 volts to the primary side of the ignition coil. When I crank the engine this drops to approx 5.1 volts. I am using a digital multimeter to measure this, and realize it is the wrong tool to indicate if the voltage is switching on/off like it should.
My question: should the primary coil see 12 volts with the main switch on? Is this spec published somewhere? Could somebody pull the connector off their ignition coil and measure their voltage for me? Really appreciate the help, thanks.