2ZR Turbo Yaris

[06YarisRS]

Gauge oil pressure sender install

This is a job I had been avoiding for a bit as I wasn't thrilled about messing with my turbo oil supply line that taps into the car's oil pressure sensor port. My believe is that each time you mess with it, you increase the chances of leaks occuring. I had planned to remote mount the OP sending unit and bought a bunch of stuff, but there was simply no way to route the hose (grease gun hose and various fittings) that wouldn't result in the hose chaffing on the engine or frame. This, of course, could result in oil loss and potential catastrophic turbo and engine failure. There just isn't enough room to install the hose and its fittings. So, I added a short 1/8" NPT brass tee and attached the OP sender to that. The fitting structure coming out of the block is extremely secure and strong. Pretty sure you could hang a house off of it.

I have one wire left to connect - the ACC power wire - which I will tap into the grey wire for the power outlet (cigarette lighter) at junction D14 just below and a little left of the steering column. Hope to do this this afternoon, fire up the car and test the gauges.

Tapping for OP sender ground. There is a little recess in the plastic shield, so I marked the perfect spot. The shield will re-install without touching the ground bolt.



Soldered ring terminal for the OP sensor ground. I had to drill the ring terminal out as the #6 bolt would not fit through.



Finished ground. Love the Grote 4 times shrinking heat shrink with adhesive, for a water tight seal.



A couple shots of the OP sensor mounted.



I adjusted the ground wire for the best flex. Still some taping to do. I taped off the harness and spray painted the bolt and area that I'd sanded to the metal. I'll blast rustproofing down inside the frame channel via the factory holes to where the bolt comes through to deter rust.



I had to drill a hole in one of the block tabs in order to have a place to attach the oil temp sensor harness.



There was nowhere reasonable to ground the oil pan temp sensor under the car so I added a grounding point to the strut tower by using an existing threaded hole. I just ran the ground wire back up the conduit that contains the sensor wire.

I also lengthened and tucked away the park light power source harness leg as I didn't like to diagonally crossing the strut tower.