100 series Voltage on start up

[chubbers001]

I have a 2006 HDJ100 and when I strt the Cruiser I noticed that the voltage meter is sitting at around 12V then after 56 seconds ( I timed it on a few occasions) the voltage increases to the approx 14V, I am getting a belt slip noise on start up but that clears imediatly when the volts go to approx 14V.
Has any one experienced this before or can any one recomend a solution apart from tighten the fan belt since the belt is prety tight.

[Shadow]

I have a 2006 HDJ100 and when I strt the Cruiser I noticed that the voltage meter is sitting at around 12V then after 56 seconds ( I timed it on a few occasions) the voltage increases to the approx 14V, I am getting a belt slip noise on start up but that clears imediatly when the volts go to approx 14V.
Has any one experienced this before or can any one recomend a solution apart from tighten the fan belt since the belt is prety tight.

The low voltage will be because the al;tenator is not spinning (fan belt slipping). So i would suggest there are bearings in the altenator failing.

Pull the fan belt off and spoin the altenator by hand.

Quite often when a water pump is failing the belt squeels at start and then goes away. one day you will start it and the squealing wont stop.

[chubbers001]

The low voltage will be because the al;tenator is not spinning (fan belt slipping). So i would suggest there are bearings in the altenator failing.

Pull the fan belt off and spoin the altenator by hand.

Quite often when a water pump is failing the belt squeels at start and then goes away. one day you will start it and the squealing wont stop.[/quote]

Thanks for that, I will remove the belt and try spinning the alternator but I am confused about the time issue I have timed the increase of voltage and every time it has been 56 ~ 57 seconds ?

in reply to the above post, I have since removed the fan belt and the alternator pulley spun with no bearing noise.

[Shadow]

Hmm. I would expect it to be more random than that.

It could be something drawing alot of current for that 56 seconds which is increasing the load on the altenator and thus making the fan belt slip. But i cant think of what.

The first thing that jumps to mind is glow plugs, but if its a HDJ100 it has the 1HDFTE which does not have glow plugs.

[chubbers001]

Hmm. I would expect it to be more random than that.

It could be something drawing alot of current for that 56 seconds which is increasing the load on the altenator and thus making the fan belt slip. But i cant think of what.

The first thing that jumps to mind is glow plugs, but if its a HDJ100 it has the 1HDFTE which does not have glow plugs.

Yes I thought it might be a big current draw on start up but I could not think of what it might be and then why would t only be in the first min of start up ?

[80's_delirious]

have you checked it with a multi meter or just rely on the in dash gauge?

[thrashlux]

Hmm. I would expect it to be more random than that.

It could be something drawing alot of current for that 56 seconds which is increasing the load on the altenator and thus making the fan belt slip. But i cant think of what.

The first thing that jumps to mind is glow plugs, but if its a HDJ100 it has the 1HDFTE which does not have glow plugs.

Yes I thought it might be a big current draw on start up but I could not think of what it might be and then why would t only be in the first min of start up ?

its the intake heater they draw a crap load of current
its that box looking thing with the big fat wire on it on the drivers side of the engine in the inlet tract just after the air comes back from flex from the intercooler

have u checked your belt tension or even a new belt
its unlikely to be the alt bearings as they dont change with load on the alternator

the timer circuit is controlled by the ECU to a relay u should hear a clunk under the bonnet when it changes over

jonathan

[chubbers001]

[
its the intake heater they draw a crap load of current
its that box looking thing with the big fat wire on it on the drivers side of the engine in the inlet tract just after the air comes back from flex from the intercooler

have u checked your belt tension or even a new belt
its unlikely to be the alt bearings as they dont change with load on the alternator

the timer circuit is controlled by the ECU to a relay u should hear a clunk under the bonnet when it changes over

jonathan[/quote]

Thanks for the info I will look into the intake heater, I have checked the tension of the belt and it is pretty tight, Should the draw of current be there ? if so why would it draw the current for only 56 seconds ? as thats the time the voltage is low, as a previous post said I have not checked the voltage with a mulit meter just relying on the dash meter, I will also put a meter the car and listen for the rely to come in.

[thrashlux]

Thanks for the info I will look into the intake heater, I have checked the tension of the belt and it is pretty tight, Should the draw of current be there ? if so why would it draw the current for only 56 seconds ? as thats the time the voltage is low, as a previous post said I have not checked the voltage with a mulit meter just relying on the dash meter, I will also put a meter the car and listen for the rely to come in.

Yes the current should be there its part of the normal start procedure

the 56 sec is what the computer is telling the relay to energise for

But no the belt should not be slipping (thats why i suggested tension or maybe a fresh belt that may grip and is not old and hard)
I dare say this is the root cause of the low voltage

cheers

jonathan