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  #1  
Old 01-13-2007, 02:21 AM
viking64 viking64 is offline
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trans power light

seams to be the subject for the month - when I start the car the [green] power light come on, goes out - so I know it is working.
If I accel hard, it will kick down ok, but no power light and will only rev to about 3200
So - what activates the power mode? - is it electrical, operated by oil pressure, throttle position or combination?

BTW - it's never workrd since I got my SVX but guessing it's not sensing anything/ lost signal somewhere

bb
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  #2  
Old 01-13-2007, 02:43 AM
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tap the gas then floor it while cruising
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  #3  
Old 01-13-2007, 02:49 AM
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3 days after having my svx, i sped up quickly, and had a heart attack.. "****, is the power steering rooted??"
after reading the forums, like richochet said, tap the gas, then floor it, seems to bring the light up no worries
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  #4  
Old 01-13-2007, 03:25 AM
viking64 viking64 is offline
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no matter how hard you want to push the load pedal - all I get is a kick down - this power thing is a mystery to me - I've yet to expeience it!
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  #5  
Old 01-13-2007, 04:13 AM
alexdownunder alexdownunder is offline
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Quote:
Originally Posted by viking64
no matter how hard you want to push the load pedal - all I get is a kick down - this power thing is a mystery to me - I've yet to expeience it!

Ah but when you do........ Nivarna....... and clean undies are handy
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  #6  
Old 01-15-2007, 04:15 AM
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After reading the SVX Service Manual, I have found that there are three factors that combine to determine whether "POWER" mode is activated.

They are the vehicle speed, the throttle position, and the throttle depression speed.

POWER mode is triggered when the throttle depression speed exceeds a defined value. That value is calculated as a function of the vehicle speed, and current throttle position.

As the vehicle speed increases, the throttle depression speed needed to trigger the POWER mode increases.

Therefore, it is easier to trigger the POWER mode when you are travelling slowly.

As well, as the throttle opening increases, the throttle depression speed needed to trigger the POWER mode decreases.

Therefore, it is easier to trigger the POWER mode when the throttle is already opened by a large amount.

Based on all of this, the most likely scenario that would trigger the POWER mode is when you are travelling slowly, with the throttle at least partially depressed. Depressing it further will usually trigger the "POWER" mode.

I have found this myself - if I exit an intersection at low speed, the transmission may still be in 2nd or 3rd gear. As I open the throttle, the transmission may stay in that gear - but if I open the throttle further (and relatively quickly), then "POWER" mode will activate, and the kickdown is instant.

At high speed, I find that I need to press the throttle more quickly to activate the "POWER" mode - but it can still be activated.

Try this - drive at a constant 80km/h, and quickly floor the accelerator. This should trigger the "POWER" mode, and the transmission should kick back to 2nd. It should hold that gear until 6500RPM, and then shift up. When you ease off the accelerator, "POWER" mode should deactivate after about 2 seconds.

The only reason that I can think of as to why the "POWER" mode would not activate is a faulty Vehicle Speed Sensor (there are 2 of them) or a faulty/incorrectly adjusted Throttle Position Sensor.

There is also a possibility that the link between the ECU and TCU is faulty, because I believe that the signal from the TPS is first read by the ECU, and then sent to the TCU.

Jason.
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  #7  
Old 01-15-2007, 05:21 AM
viking64 viking64 is offline
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thanks, that helps - I have tried both, from standstill and @ 70kph up a hill, it changes down and not sure on the rpm but never goes near 6500, more like 4000 and will change up.
Would appear that one of the required signals is not there.
Does the book say if the power light (when engine starts) has checked the system and is all good for the transmisssion or engine or both?
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  #8  
Old 01-15-2007, 07:38 AM
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Bruce

Don't panic, man. There is an easy answer.

Later cars have the Power mode in the transmission all right, but the Power light does not come on to show it.

Yours is 1995. It is very possible yours is one of these later models, in which case, if it is, the Power light will never come on while driving.

Is your car one colour all over? Does your car have the OBD11 socket in the dash below the steering to one side?

If so, you probably have the "new" electronics.

Joe
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  #9  
Old 01-15-2007, 02:35 PM
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Power light.

Mine is a 95 Aust.mod, and it has the normal power light. I think there must be a fault in the Viking. Should operate as Jason says.

Harvey.
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  #10  
Old 01-15-2007, 04:36 PM
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Quote:
Originally Posted by oab_au
Mine is a 95 Aust.mod, and it has the normal power light. I think there must be a fault in the Viking. Should operate as Jason says.

Harvey.
Yeah, but Harvey, your model has those poncy BBS wheels. They put the blinky Power light in that model to keep you old guys awake while overtaking!!

Joe
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  #11  
Old 01-15-2007, 05:52 PM
oab_au oab_au is offline
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Quote:
Originally Posted by svxistentialist
Yeah, but Harvey, your model has those poncy BBS wheels. They put the blinky Power light in that model to keep you old guys awake while overtaking!!

Joe
Stay awake, I just turn the "Dark side of the moon" up.

Harvey.
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  #12  
Old 01-15-2007, 06:20 PM
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Quote:
Originally Posted by JDW-SVX
After reading the SVX Service Manual, I have found that there are three factors that combine to determine whether "POWER" mode is activated.

They are the vehicle speed, the throttle position, and the throttle depression speed.

POWER mode is triggered when the throttle depression speed exceeds a defined value. That value is calculated as a function of the vehicle speed, and current throttle position.

Jason.
Jason, sorry to abbreviate so as to save space, as all you posted was good stuff.

The TPS is a component which could be out of adjustment and is easy to check, as per details in the how too stuff.
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  #13  
Old 01-15-2007, 06:24 PM
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Quote:
Originally Posted by oab_au
Stay awake, I just turn the "Dark side of the moon" up.

Harvey.
Quite feasible, in that your earth is flat.
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  #14  
Old 01-15-2007, 07:47 PM
viking64 viking64 is offline
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I have checked TPS, I have reading .5 at idle, should there be anything else? Reading at full throttle maybe?
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  #15  
Old 01-15-2007, 07:52 PM
viking64 viking64 is offline
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Quote:
Originally Posted by svxistentialist
Bruce

Don't panic, man. There is an easy answer.

Later cars have the Power mode in the transmission all right, but the Power light does not come on to show it.

Yours is 1995. It is very possible yours is one of these later models, in which case, if it is, the Power light will never come on while driving.

Is your car one colour all over? Does your car have the OBD11 socket in the dash below the steering to one side?

If so, you probably have the "new" electronics.

Joe
Thanks Joe, yes it's a 95 all one colour (well, 3 actually - 3 diffrerent faded shades of red - mirrors especially) but I don't know if OBD2 exists in Aussie cars, only US ones, I do have yellow subaru select (I think) behind the ashtray - so far thats all I could find
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