loss of power!

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FAQ states "Consider replacing the starter contacts at the same time if you need to do them. You will have done some of the work needed to access the starter.


Which starter?
 
Took the whole TB apart to give it a good clean and put it back together. A few questions;

1) the motor on the TPS end, what does it do exactly?
2) with the APPS in place, as youu manually pull back the cable, mechanism inside only catches a lever when it is past, say, 75%. It's past 75% that the "flap" moves but only slightly, say 25%. Is this corect? Or is the instalation of the APPS no corret?
3) fault codes still read TPS & APPS eve though both have been replaced and TB cleaned.

As you reset ecu, CEL comes straight on as you start up, it's always there!
 
AFRIKANZ said:
Took the whole TB apart to give it a good clean and put it back together. A few questions;

1) the motor on the TPS end, what does it do exactly?
2) with the APPS in place, as youu manually pull back the cable, mechanism inside only catches a lever when it is past, say, 75%. It's past 75% that the "flap" moves but only slightly, say 25%. Is this corect? Or is the instalation of the APPS no corret?
3) fault codes still read TPS & APPS eve though both have been replaced and TB cleaned.

As you reset ecu, CEL comes straight on as you start up, it's always there!
Click to expand...

did you do a search on TPS and APPS? I think this thread https://forum.ih8mud.com/showthread.php?t=38092 will prolly help you out. I ended up getting my APPS changed out via dealership....zero issues now. As i said, i THINK you have to adjust it right, if not it wont work. Can you limp to the dealership and have them adjust?
 
Is it not the TPS that needs adjusting??

Some please tell me function of motor above TPS............ It run freely but does not tun the gear at one end........ looks like some kind of clutch?
 
Pulled TB appart for a clean.......

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What does this motor do? If you rotate it, the gear at top end does not rotate....? Could this motor be the cause of my problems?

Can someone please tell me how this TB works? As in, if you twist the APPS, throttle/flap only opens when you're at 75%. Is throttle/flap controlled by this motor?
 
From what i know, which is not much, the TPS and the APPS work in conjunction. When you press the throttle the two sensors regulate a proper mixture of air/gas based upon what you are asking it to do. If i recall, again i am vague on this, if the two are not calibrated correctly then it throws it completely off. I remember reading that if you do changed them out by yourself then you will need to go to the dealership to get the final adjusting. Just slotting them in gets you in dicks shot of the proper adjustment...

The reason for the failure of the TPS/APPS is due to the TB leaking crap into the sensors thus causing failure...

again, i may be way off here, but i did stay at a Holiday Inn Express last night..

good luck
 
Ok, how is the air regulated? is, how does the throttele body adjust the butterfly/flap?

Anyone have a munaul with exploded view of the TB? Be greatly appreciated!
 
The manual does not provide any more info than R&R the parts and hook up the Toyota dealer gizmo to adjust. The TPS is the one that needs adjusting but some have had good results just imitating the off going part and bolting it on.
 
It's definately a probelm eleswhere since both the TPS & APPS have been replaced.

Am now lost, don't know what to do!!
 
Just had car checked by another dealer, they tell me it's the Throttle Control Motor........ just ordered that at £200................... Bills keep building up
 
the 'motor' photographed is the throttle actuator motor, which is part of the 'throttle body assembly.' This is a 'drive-by-wire electronically actuated throttle, with a back-up mechanical link (cable) to enable you to drive perhaps 40 mph or so when the electronic gizmo quits. Lots of these things failed (and still do) on MBZ from about 1990 or so when the insulation on all the tiny wires in the harness crumbled to dust (bio-degradable wire insulation!)
You push on the accelerator. The accelerator position sensor tells the 'computer' how much to open the throttle. The computer sends the signal to the throttle actuator electronics, which engage the fail-safe clutch and turn the motor to open the throttle plate. A position sensor attached to the throttle plate changes in resistance, which the computer interprets as a position. When the measured throttle position matches what the accelerator position asks for, rotation stops.
 
AFRIKANZ said:
The OBD2 reader didn't fit :(

This car's diagnostic plug is under the bonnet............ people, suggestions please?
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i too originally thought the OBD plug was the one under the bonnet/hood that has a diags label on it.

I too have that one, but you need plug your OBD2 reader into the one that's inside the car.

Mine's also right-hand drive and you need look above the accelerator and brake pedals. That's where it is. Checkout the photo that was posted earlier even though it's a LHD car, it's in the same spot but on the right-hand side.
cheers
peter
 
Texasoil said:
the 'motor' photographed is the throttle actuator motor, which is part of the 'throttle body assembly.' This is a 'drive-by-wire electronically actuated throttle, with a back-up mechanical link (cable) to enable you to drive perhaps 40 mph or so when the electronic gizmo quits. Lots of these things failed (and still do) on MBZ from about 1990 or so when the insulation on all the tiny wires in the harness crumbled to dust (bio-degradable wire insulation!)
You push on the accelerator. The accelerator position sensor tells the 'computer' how much to open the throttle. The computer sends the signal to the throttle actuator electronics, which engage the fail-safe clutch and turn the motor to open the throttle plate. A position sensor attached to the throttle plate changes in resistance, which the computer interprets as a position. When the measured throttle position matches what the accelerator position asks for, rotation stops.
Click to expand...

Had assumed just as much. Will have changed all TB parts now........ The TPS & APPS I removed, might not have been faulty? :flipoff2:
 
moooooooo said:
i too originally thought the OBD plug was the one under the bonnet/hood that has a diags label on it.

I too have that one, but you need plug your OBD2 reader into the one that's inside the car.

Mine's also right-hand drive and you need look above the accelerator and brake pedals. That's where it is. Checkout the photo that was posted earlier even though it's a LHD car, it's in the same spot but on the right-hand side.
cheers
peter
Click to expand...

It was just behing the brake pedal. Had been looking for it at night after work, checked again Saturday morning by removing trim under steering and there it was! :doh:
 
AFRIKANZ said:
Had assumed just as much. Will have changed all TB parts now........ The TPS & APPS I removed, might not have been faulty? :flipoff2:
Click to expand...

you're better off changing them out.....they will become faulty and it's not fun to go into limp mode trying to cross two lanes of traffic...
 
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