XYZ Switch Question
#11
12-27-2017 | 08:08 PM
The BCU supplies the ground for the relay if the trans is in park or neutral (may be other conditions, like the security immobilizer not triggered). Turn the key to the start position and see if the starter relay in the engine compartment clicks. If it does, then you have a good ground and your problem is between the starter relay and the relay on the starter itself. If it does not, then either the BCU will not complete the ground (XYZ switch, security, etc.) or there is a problem with the connection between the starter relay and the BCU,
Curious, have you tried starting in both P and N?
Curious, have you tried starting in both P and N?
I have, and I appreciate the diagram, I will study it.
#12
12-27-2017 | 10:57 PM
I did have an XYZ switch from an 04 kinda give me some grief like that. All I did to fix it was loosen the two bolts holding it on, and slightly move it one way, tighten it down, try to start to D2, and then if that didn't work move it the other way and give it a go. It showed PRND321 perfectly, but D2 wouldn't start. I had just swapped it over my 04 (which was giving me M & S flashing) onto my parts truck which started just fine before. I've noticed the newer black XYZ switches are much more sensitive when it comes to being adjusted 100% perfect. After I tinkered with forward/backward movements (two people makes it SO much easier) I finally got it and she fired right up. It's still either off or it's bad because now when I move my parts D2 around if I slap it into R it bogs and tries to quit. It never did it before I moved the 04 XYZ to the 03. After the swap my 04 now has never had the flashing M & S and the problem seems to be following the XYZ switch itself. I'd tear it apart and clean it, but the previous owner of the 04 had just replaced it. I think it's faulty honestly.
#13
12-28-2017 | 02:10 AM
Baja
Joined: Aug 2013
Posts: 5,845
Likes: 368
From: Near Bordeaux, France
It is very unlikely the XYZ switch is inhibiting the starter as they are unconnected. I think your problem is a power issue to the large cables and maybe the LV 12V exciter wire to the starter solenoid. Check for 12 volts at the starter positive large cable and also the LV 12 volts small cable whilst someone engages the start ignition position. If there is no power at the large positive starter cable it's either a faulty battery connection, ground connection or the large power fuse blown.
#14
12-28-2017 | 03:03 PM
#17
12-28-2017 | 06:03 PM
Camel Trophy
Joined: Oct 2016
Posts: 4,705
Likes: 1,282
From: Michigan
Can't remember, but isn't the BCU the one controller that's located in the center console...if so...pull the window switch cover off and see if any variants have chewed some wires inside. Had some mice chew the XYZ switch wiring on our 04...little basta*ds. My conditions were not the same as yours, but there are many wires in there for a mouse to chew...could have got ahold of that BO wire.
Brian.
Brian.
#18
12-28-2017 | 06:45 PM
Can't remember, but isn't the BCU the one controller that's located in the center console...if so...pull the window switch cover off and see if any variants have chewed some wires inside. Had some mice chew the XYZ switch wiring on our 04...little basta*ds. My conditions were not the same as yours, but there are many wires in there for a mouse to chew...could have got ahold of that BO wire.
Brian.
Brian.
BCU is behind the glovebox. SRS module is under the center console.
The following users liked this post:
The Deputy (12-28-2017)
#19
12-29-2017 | 10:54 AM
I picked her up, and she is starting right up. The affect is immediate. I am strongly leaning toward the CPS being the culprit. My best guess is the ECM needed to cycle through with the new Sensor. If this were a bad connection/wire somewhere, I just don’t think it would fix itself to this dramatic a level. Anyway, I will update if anything changes of someone has this issue in the future.
#20
12-30-2017 | 06:42 AM
Camel Trophy
Joined: Oct 2016
Posts: 4,705
Likes: 1,282
From: Michigan