1. Test the EFI relay or by substitute then retry.
2. The EFI relay controls the Circuit Opening Relay @ the COR that's where all the Sensors gets their power. Any short beyound there will kill the EFI fuse.
3. Try this, remove the EFI relay, put new fuse in place and attempt to start it-if the fuse don't blow your problem is coming from between the EFI relay and one of the sensors
4. Not familiar with the color code on the Rav4
5. Does the fuse blows when you turn the ignition On or it blows later on? Need to know before we proceed on.
6. My main target here is the Air Flow Sensor and O2 sensor circuit.
The way I fix mine I check every wire going to each sensor for short to ground. You just need a good electrician to find it.
7. Disconnect the MAF sensor and again turn the ignition On check whether EFI fuse blows
8. Just to let you know its hard to troubleshoot over the net. I don't believe on a trial and error replacement. Lets find it together with luck from above.
9. BTW am aware it will not start when ignition fuse is removed it kills the Ignition and Injectors. I was segregating between the Ignition and Fuel system. Right now your problem is coming from the EFI circuitry.
Monday, July 17th, 2006 AT 7:33 PM