greynolds said:
They aren't positive why the GuidePoint upset the air bag system, but their best guess is that it put some sort of back feed into the line that caused the problem. The bottom line is that hooking the GuidePoint up elsewhere made everything happy. As to how the wire was tapped, they had simply cut a small amount of insulation off, wrapped the wire around it (that strikes me as a piss poor way to do it), and put tape over it. So the repair was to remove the tape, unwrap the wire, and put a fresh piece of tape over it in place of the insulation, which really should be fine.
The GuidePoint activated the SRS warning light because it increased the amp draw on the wire supplying 12 volts to the Airbag Sensor Assembly (SRS computer). The extra amp draw dropped the voltage. The Airbag Sensor Assembly includes a circuit to monitor voltage and to automatically increase it when low. It also lights the SRS warning light when low voltage is detected and turns it off when normal voltage is restored. This is from the 2002 LC FSM page DI-604.
Since the GuidePoint installer tapped into the 12 volt supply wire for the SRS and not the actual SRS wire harness indicated by a yellow sheath and yellow plugs, the SRS harness doesn’t need to be replaced. Out of curiosity, I contacted a Toyota dealer and found the retail price for a new SRS harness for a 2005 LC is $1,853 with a three day lead time.
As for the repair job on the SRS supply wire, electrical tape is questionable for a permanent repair. I’ve seen too many similar repairs after several years of exposure to heat from parking in the sun with the windows up. The tape turns into a sticky mess that unwinds, exposing the bare conductor. If at all feasible, I’d insist on cutting the wire at the bare spot, slipping on a piece of heat shrink tubing, soldering the wire back together, and then shrink the tubing with a heat gun over the solder joint.
When you pickup your vehicle, go through the SRS checkout procedure detailed in Post 118. This will at least insure the SRS warning light wasn’t disconnected or the lamp removed. Based on this dealership’s track record, you still need to keep your guard up. Hopefully, you or your family will never be dependent on the SRS to save your lives but you never know.
As part of the final settlement, I’d push the dealer to include a set of FSM’s for your 2006 LX. Even if you plan to never turn a wrench yourself on this vehicle, the manuals are a great information resource and you can use the information to keep service departments honest. The manuals retail for around $300. You’ve still got the survey response to hold over their head.
Once you get this ordeal behind you and start driving your LX, I’m sure you’ll be extremely happy with your purchase decision and feel it was money well spent.