The meter you have PROBABLY does not do graphing. Most graphing meters (oscilliscope/lab scope) like what I'm referring to start at about $1,000.00. If you have a model number then I can research it and tell you if it's capable.
The connector for the harness side should have three wires. With the sensor unplugged, two wires will show 5 volts and the other wire is your ground wire for the sensor. When you plug the connector back in, if you're able to pierce to tap in to the wires, one wire will still show 5 volts but the other one that previously had 5, will now drop. You can use your ground wire for the black lead of your meter while you're checking these voltages.
While you have the meter hooked up to the wiring checking for 5 volts and ground, have someone help you by moving the engine harness around. What we're looking for is a drop in the voltage caused by the rest of the harness rubbing on the engine, shorting with other wires inside the wire loom or signs or oil saturation. Continue monitoring the voltages while the wires get wiggled all the way back to the computer.
The diagrams I have are for a 98 model but they should be fairly close. I can get the correct diagrams (or verify them to be the same) tomorrow.
-Black/Light blue should be the sensor ground
-Violet/White should show 5 volts all the time
-Tan/Yellow should show 5 volts when unplugged and drop when plugged back in.
It's getting late here and I need to knock off for the night. I'll be available again tomorrow night starting at 6:30pm EST. If you have questions during the day I MAY be able to answer them. If you need assistance quicker, I can opt out and another expert can assist you further.
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