Originally posted by JSmith:

The only components left out of the do not try this test are R6, the ignition switch and the PATS system.

There is a test you can do that will confirm whether PATS is the problem or the ignition switch is the problem by doing this: With the ignition switch electrical connector disconnected use a short piece of wire to short out the sockets with the red and grey/white wires of the connector that is part of the car's wiring. Doing this will make the connection that the switch makes when you turn the key to "start" NO GO== Makes no sounds. A whole lotta nothing!

According to the haynes manual there should be 5 wires at from the ignition switch. red, green, grey/white, yellow and red/yellow.

Red wire has power from the battery at all times and should have battery voltage. I couldn't get my meter to read this, but I may not have grounded it correctly.

Green wire goes to the ignition relay which, when energized makes power available to all the circuits related to the engine running including the fuel pump. You can use the wire and make a connection on the conector between red and green and the lights and chimes should come on and if its working the fuel pump should run for 1 to 2 seconds. This worked fine, ding ding ding, etc. . I'm still not sure the fuel pump is running, I didn't hear it.

Grey/white wire is the wire that sends power to R6 when you turn the key to start

red/yellow is for lighting like the headlights and the hazard flashers, interior lights

Yellow wire goes to the anti-theft/PATS, door ajar warnings, keyless entry, stereo.



I did the above electrical ignition switch testing. I also replaced the switch with one from a junker.

So am I looking at a PATS problem?

I watched the led as I was trying to start the car, and it never did anything unusual. Just flashed every 2 seconds or so.

If so, does it need to go to a Dealer? Or can an indy do it?

MUST SELL - ECM computer new for a 98 V6 mtx + pats Now trolling in a Red Nissan 4 x 4