Flashing TOD Light - think I broke my truck

[johnnyapollo]

I just took another look at the workshop disk - seems Joe is right and there is something fishy about both sensors being fubar - I'm taking a closer look when I get home this evening. Either the dealer is lying and I only need one (and they were too lazy to isolate which one is bad), or there's something going on with the harness that feeds the two. If the TOD ECU was bad it would show a different trouble code - but who knows what the dealer did to determine what was wrong. I took a hit from a piece of tire on the interstate last week - struck the passenger side front of the VX - no damage but I did notice the cladding was pushed in a bit - it could be pinching part of the harness that loops around the front of the VX - I'll loosen things up a bit when I get home this evening and see if it makes a diff (was going to do that anyway).

-- John

[johnnyapollo]

Thought I would follow up - peeled off the whole front of the VX to look for shorts in the harness - there weren't any so got busy looking at the wiring to the sensors - got the sensors during the week (supposed to be here 2 Fridays ago but they messed up and sent them to my old work address). Dismantling the existing harness was quite a PITA - there are plastic tabs that a bolt runs through into the TOD unit - each sensor has a round plug with a blue o-ring that's quite difficult to remove - have to gently pry all around until it loosens - I ended up breaking one tab from my existing bottom sensor (top came out first with no issue). You also need to disengage a tranny sensor that's also part of the harness. Once the harness is loosened up, you have to disengage the main connector on top of the unit - this was quite difficult as you can hardly thread one arm up there to grab it and the connector has to be mashed down for it to release - quite a bit of frustration there.

The connector can then be slid down the passenger side of the TOD by loosening the bolt holding the gas lines to the top of the case (you can then lift the lines and shimmy the connector under them). Once apart, all plastic wire casing has to be removed and the two sensors have to be unpinned from the connector (note that there are two wires who's ends are burried in the tranny that are still attached to the connector, so you're basically laying under the truck the whole time). I unpinned by removing the back and sliding a small screwdriver into the pin slots while wiggling the wire from the back.

The two new sensors are attached in a reverse of the above - lubing the o-ring with silicon helps but it's still a PITA getting them back in. Pinning into the connector isn't as bad as depinning. Once it's back together, electrical tape pulls the casing back on, making sure to reinstall the two wires you had to pull out for slack (the ones mentioned above that terminate in the tranny). Getting the main connector back together wasn't easy. Once you get the "click" you can bolt the connector back to the top of the case, bolt the gas lines back, reconnect the sensors and the 3rd sensor on the tranny (this one get's a zip tie too to help hold the wire out of the way). When it was back together I reconnected the battery (left out that it needs to be disabled while you work on this, as with any electrical system), got in and started her up. Started on the first try.

Drove her down the road and noticed a new, high pitched whine - this lasted until I goe back to the house and backed in. Next startup and the whine wasn't there - all this so far was about 5 hours dismantling last weekend and about 4 hours putting her back together on Saturday. This morning I got in her and once again noticed the whine, but much fainter - driving a few miles the whine went away completely - I'm not sure what it was and hope it's not something that will come back to haunt me later.

Last week, when I realized the parts woudn't make it I had an offer from Joe Black to use the sensors off his ebony up at John Schellenberg's - he was nice enough to remove the piece of harness from Joe's and drop it off last Sunday morning (took him an hour to do this - dunno why it took me 5 to do the same thing! - difference in skill level I guess). After spending so much time fumbling with removing mine I didn't have it in me to finish (it was getting dark) so I figued I would just wait for the parts. Now I still have to put Joe's back in his ebony, but that can wait until next weekend.

Good news is that the flasing TOD light has gone away and she's driving great - guess that's what is most important. Note that I used the CD manual as a reference and it looked easy from that perspective - but this was anything but easy to do. If I had known it would be this hard I would have just paid the money and had the dealer's service group do it. I'll think twice next time.

-- John