Have you done any mods recently, clipped wiring, etc? Could be just a fluke. Have you tried disconnecting the battery and seeing if the code reappears almost instantly?
The information bus wires on my year model are a twisted pair. One wire is white w/black stripe, and one wire is violet w/brown stripe. They’re probably the same on your 93, although I’ve heard the 93 has a lot of unique modules, so the bus may be different.
Anyway, never tap into the bus wires.
Other than that, your new alarm may be stunning the BCM (body control module) when it’s sending a door lock/unlock signal if it’s not doing it correctly. The BCM is what controls the door locks. If the BCM (or the tranny controller-TCM) isn’t talking on the bus, then a code 66 will be set.
Do a little experimentation when you get a chance: clear your codes (disconnect battery) and try your door lock/unlock on the alarm and see if that’s when the code 66 is actually set. If it is, then stop immediately. You may be damaging your BCM and you might wanna recheck your alarm wiring.
The above is just my best guess without actually being there of course.
what i did was hooked my unlock wire output from my alarm to the unlock wire in my car, and the lock from my alarm to the lock wire in my car
some people said i needed relays, some said i didnt- do i?
Hmmm, that shouldn't cause that error. Does the alarm have an autostart? You can get this error if the startup sequence is not correct. I had this problem on my 96 when I installed the autostart. The TCM computer was not being powered up until after the car started. This did not affect the dirvability however, since the TCM came on immediately after. The check engine light was annoying though.
Hmmm, that shouldn't cause that error. Does the alarm have an autostart? You can get this error if the startup sequence is not correct. I had this problem on my 96 when I installed the autostart. The TCM computer was not being powered up until after the car started. This did not affect the dirvability however, since the TCM came on immediately after. The check engine light was annoying though.
So, if you install autostart on an LH car, you have to live with the check engine light each time you use it? Ugh... I'd be on the phone with Viper support if that's the case.
No, I fixed the problem with a diode out of a burnt up computer power supply. Not every car uses the same ignition sequence. In my case the started had three control wires, but I needed to switch four lines in the car.
so isit ok to drive with this code on? i dont have electric start, and i didnt tap into any bus wires, so should i continue to drive with it on? will it damage anything ? it wont hurt my mpg or any other thigns will it?
so isit ok to drive with this code on? i dont have electric start, and i didnt tap into any bus wires, so should i continue to drive with it on? will it damage anything ? it wont hurt my mpg or any other thigns will it?
So, the code 66 keeps reappearing even if you disconnect the battery? That can't be good, but it may not necessarily cause any noticeable drivability problems.
If you removed any connectors during the process of your alarm install, you may want to recheck those connections and make sure you didn't short any pins together. You may have inadvertently shorted the bus wires, or maybe the BCM just doesn’t like the way you set up the power door lock controls with the alarm.
If you come up with nothing, then you may want to get someone to check things out with a scantool and see if it's the BCM or TCM that doesn't want to talk.
Does the alarm have an ignition disable? I figure it does, but then you couldn't have just tapped into the wires. To me it still sounds like the PCM is being powered up while the BCM and TCM are still turned off.
I don't think disconnecting it will help. What ignition wire does it break. If I remember correctly there are three. 1 is on in on, run, start, another is on in run and start, the last is on only in start.
Did you just tap the ignition wire or splice the disable relay in?
I pulled this off of alldata, it describes the switch functions to the tcm. My guess it is circuit F11 and my next guess would be circuit A41. I can probably dig up the schematics if you need them.
CIRCUIT OPERATION
The transmission control system is used on all automatic transmission applications. It provides smooth and accurate shift points and can adjust as the transmission wears.
Power for the Transmission Control Module (TCM) is supplied from three sources. One is a direct battery feed on circuit A14. This circuit is protected by a 20 Amp fuse located in the Power Distribution Center (PDC) cavity B. This circuit is spliced and supplies power for the transmission control relay.
A switched power input is also supplied, to the TCM, on circuit A41. This is the power supply is for the engine starter relay, coil side, and is HOT in the START position only. Circuit A1, which connects to the ignition switch, supplies power to circuit A41 in the START position and is protected by a 20 Amp fuse located in cavity A of the PDC.
Circuit F11 also supplies a switched power input to the TCM and is HOT when the ignition switch is in the OFF/RUN/START position. This circuit is protected by a 5 Amp fuse located in the cavity 17 of the junction block. Power for the fuse is supplied on circuit A81. This circuit, A81, is powered by circuit A1 from the PDC. Circuit A1 is protected by a 20 Amp fuse located in cavity A of the PDC.
Ground for the TCM is supplied on the Z13 circuit, which is a power ground, and circuit Z14, which is a signal ground. Both grounds terminate at the left front frame rail.
The CCD Data Bus is used to allow the controller to communicate with other controllers and the universal data link connector. The circuits involved are, D1 for CCD (+), and D2 for CCD (-).
Circuits D6 and D21 are used to allow the TCM to communiate with the universal data link connector. The D6 circuit is used as the SCI receive line, and the D21 circuit is used for the SCI transmit line.
I guess I would try disconnecting the ignition disable. I do not know how it could work correctly without cutting an ignition line and installing a switch anyway.
What the previous section says is that two signals are needed to turn on the TCM. One of which may be incorrectly functioning due to the starter disable - you may be pulling the signal low.
I guess I would try disconnecting the ignition disable. I do not know how it could work correctly without cutting an ignition line and installing a switch anyway.
What the previous section says is that two signals are needed to turn on the TCM. One of which may be incorrectly functioning due to the starter disable - you may be pulling the signal low.
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