CalaisTurbo New Tags
User Name: Password:

Go Back   calaisturbo.com.au > Technical > Suspension, Brakes, Gearboxes, Diffs
Tyres Now

Reply

 

Thread Tools
Old 23-10-06, 20:27   #1
Fallen
Player
 
Fallen's Avatar
 
Join Date: 23-03-06
Location: WA, Perth, North
Car: VW Golf GTI MY08
Trader Rating: (1)
Auto Trans ECU Diagnostics & Overdrive Problem

While searching for the solution to a auto transmission problem i've got, i found a great diagnostics function that was posted some years ago (by wagon01) but never fully explained to my knowledge. It allows you to perform a self-diagnostic test on the transmission electronic control unit (ECU) fairly easily. The diagnostic flow chart (originally posted by wagon01, sorry for the size) is as follows:



The detent switch is the switch underneath the driver's side lower dash panel that triggers when the accelerator is depressed fully. All you have to do is push the PWR button in (not in power mode), put an elastic band around the detent switch so that it always thinks the car is on full throttle, then follow the chart. Mine flashed once a second when parked, i'm interested to know if anyone else's does the same and their transmission is fine. BTW - it's quite interesting driving around with the detent switch engaged all the time. Probably pretty bad for the trans/engine tho...

**************************************

The actual problem I have is that i've just had a s/h auto turbo box installed which never engages the overdrive gear. My old box never had a problem with going into overdrive - as soon as it was warm it would kick in perfectly every time.

My diagnostics using the above test resulted in a one-second flashing while parked, and the flashing stopped as soon as i went over 15km/h (the power light went out completely). The overdrive cancel solenoid seems to be wired and not damaged externally, but can anyone tell me where the connector that joins this to the trans ECU would be located? I assume it's not directly wired.

From what I can gather, it seems as though the overdrive cancel solenoid needs to be powered in order to disable (cancel) the overdrive/4th gear. Does this mean that my solenoid is constantly powered? Is there a way i can check for this (ie pulling the connectors off the trans ECU and seeing if it will go into overdrive once over 60km/h)?

Or is it more likely that the solenoid is stuffed and stuck in the cancel position?
__________________
get out there and drive...

Last edited by Fallen; 23-10-06 at 20:41. Reason: Automerged Doublepost
Fallen is offline   Reply With Quote
Old 29-08-11, 06:22   #2
Born2xlr8
SirGeo's Bitch
 
Born2xlr8's Avatar
 
Join Date: 23-10-05
Location: VIC, Pakenham
Car: VLCT-86
Trader Rating: (5)
sorry to bump an old thread, any way to find this flow chart?
__________________
VLCT-86 auto
95 VR Ute 5lt

Interested in starting a Car club for the SE Sub's of Vic Brettvella@bigpond.com
Born2xlr8 is offline   Reply With Quote
Old 29-08-11, 20:56   #3
GMHVLCT
Player
 
GMHVLCT's Avatar
 
Join Date: 12-01-03
Location: SA, Adelaide
Car:
Trader Rating: (8)
here you go...

__________________
ban low performance drivers not high performance cars
GMHVLCT is offline   Reply With Quote
Old 30-08-11, 06:20   #4
Born2xlr8
SirGeo's Bitch
 
Born2xlr8's Avatar
 
Join Date: 23-10-05
Location: VIC, Pakenham
Car: VLCT-86
Trader Rating: (5)
<3 xd
__________________
VLCT-86 auto
95 VR Ute 5lt

Interested in starting a Car club for the SE Sub's of Vic Brettvella@bigpond.com
.
Born2xlr8 is offline   Reply With Quote
Old 30-08-11, 06:26   #5
theVLguy
Gold Members
 
theVLguy's Avatar
 
Join Date: 21-05-06
Location: Brisbane, southside
Car: VL turbo
Trader Rating: (5)
The od solenoid is energized
(12v) to disable od

So to engage od u remove 12v from
The solenoid.

All the ecu controls is the od solenoid and the converter lockup on na models.

U can just remove the ecu and wire a relay and switch for od as is done when converting to full manual
Valve body
theVLguy is offline   Reply With Quote
Old 30-08-11, 13:40   #6
Born2xlr8
SirGeo's Bitch
 
Born2xlr8's Avatar
 
Join Date: 23-10-05
Location: VIC, Pakenham
Car: VLCT-86
Trader Rating: (5)
gmhvlct, where it sais "refer to the folowing chart" you wonldnt have that would you?
__________________
VLCT-86 auto
95 VR Ute 5lt

Interested in starting a Car club for the SE Sub's of Vic Brettvella@bigpond.com
Born2xlr8 is offline   Reply With Quote
Old 31-08-11, 00:20   #7
GMHVLCT
Player
 
GMHVLCT's Avatar
 
Join Date: 12-01-03
Location: SA, Adelaide
Car:
Trader Rating: (8)
no thats all i have, originally saved it from this forum. think its from the holden supplement manual
__________________
ban low performance drivers not high performance cars
GMHVLCT is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time now is 02:29.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.