DaveNZ
New Member
- Joined
- Apr 9, 2012
- Messages
- 45
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- Location
- Auckland
- Members Ride
- VR Ute,3.8,T5
hoping to hear from anyone with/had the same issues.
sometimes the car wont start, the solenoid doesn't even engage. once started once i can turn it back off & it'll fire up many times on the key.
I wired a switch to the dash to bridge the starter relay on demand when it happens so I don't have to get under the hood each time.
when I turn on the key it does a system check & beeps then 'check powertrain' comes on the dash followed by 'ESP failed'.
the esp on/off button has no effect at that point(I push it, but no corresponding on/off reading on dash)
it will drive fine except when slowing to a stop it will downshift with a hard clunk 4-3,3-2,2-1 no problems on kickdown under power or going up the gears.
if I see the 'esp failed' on startup I turn car off, remove key/reinsert/restart & repeat until esp failed msg clears, then I test by pushing the esp button to see it turn off & on. then there is no trans problem whatsoever, it is smooth for the entireity of that trip. then the next trip I sometimes have to repeat the process again.
I am thinking that it's working something like this...
when the key goes in & ignition turned on, the car does some sort of initialisation routine. I suspect that something doesn't initialise at that point & from then on the trans will play up. but if I keep re-trying the initialisation sequence it eventually gets a good reading & the trans works fine.
this is a consistent pattern.
this leads me to believe there is some kind of electrical relay/communications fault which involves the trans.
I am thinking maybe the ecu is not talking to tcm(transmission control module) correctly hence why it is shifting weird?
I had it read with a non tech2 it indicated the very generic exhaust cam position sensor error on bank2 code P0391.
this was before i'd established the pattern.
It also showed code P0700-00 malfunction indicator request from transmission module(tcm)
the guy I had look at it was stumped, but suggested the key barrel may be a problem.
i'm going to swap cam position sensors & get it re-read to see if the code follows the 'bad sensor' or stays with exhaust on bank 2.
any ideas appreciated guys, i'm not making much progress.
sometimes the car wont start, the solenoid doesn't even engage. once started once i can turn it back off & it'll fire up many times on the key.
I wired a switch to the dash to bridge the starter relay on demand when it happens so I don't have to get under the hood each time.
when I turn on the key it does a system check & beeps then 'check powertrain' comes on the dash followed by 'ESP failed'.
the esp on/off button has no effect at that point(I push it, but no corresponding on/off reading on dash)
it will drive fine except when slowing to a stop it will downshift with a hard clunk 4-3,3-2,2-1 no problems on kickdown under power or going up the gears.
if I see the 'esp failed' on startup I turn car off, remove key/reinsert/restart & repeat until esp failed msg clears, then I test by pushing the esp button to see it turn off & on. then there is no trans problem whatsoever, it is smooth for the entireity of that trip. then the next trip I sometimes have to repeat the process again.
I am thinking that it's working something like this...
when the key goes in & ignition turned on, the car does some sort of initialisation routine. I suspect that something doesn't initialise at that point & from then on the trans will play up. but if I keep re-trying the initialisation sequence it eventually gets a good reading & the trans works fine.
this is a consistent pattern.
this leads me to believe there is some kind of electrical relay/communications fault which involves the trans.
I am thinking maybe the ecu is not talking to tcm(transmission control module) correctly hence why it is shifting weird?
I had it read with a non tech2 it indicated the very generic exhaust cam position sensor error on bank2 code P0391.
this was before i'd established the pattern.
It also showed code P0700-00 malfunction indicator request from transmission module(tcm)
the guy I had look at it was stumped, but suggested the key barrel may be a problem.
i'm going to swap cam position sensors & get it re-read to see if the code follows the 'bad sensor' or stays with exhaust on bank 2.
any ideas appreciated guys, i'm not making much progress.
