Precedent shutdown at full throttle. Excel

Romrok · 04-05-2015, 01:12 PM

Hi all,

This one has been troubling me for a bit.

From the beginning,

Cart smoked its controller. You could smell the electrical burnt smell near it.

Got a refurbished excel controller with speed 4 installed.

Put it in and the cart started running again except if the throttle is all the way down the cart stopped accelerating and regen braking slows it down, back off on the throttle and it starts going again.

Plugged in the IQDM P and watch the throttle position. Somewhere around 90 percent it drops to zero and gives you the above symptoms.

I go for that as mcor issue and order replacement. No change.

Searching around on here. I find a thread that TDawg answered on. The tps adaptor has failed.

Ordered that, replaced, and still no change.

Now I have come full circle to the controller, is it possible this is a programming issue with the rebuilt controller, or just a defect, and it thinks its going out of range? Or is there something else I should look for?

Thanks for the help
Rom

Sergio · 04-05-2015, 02:11 PM

Measure the actual voltage on the yellow MCOR wire in relation to pack negative (meter on 20v DC scale).

The last time the TPS to MCOR adapter was discussed, TahoeDawg said that both versions (IQ and Excel) had the same part number.

I have no idea how the dealer can tell which ones have the resistors internally (Excel model) and which one don't (IQ model).

The 451Ω resistors will change the throttle signal as seen by the controller from 0-5v to 0.35-4.65v, so if You don't have the resistors in yours, it will give you a throttle fault (out of range) if it goes to 5v.

Romrok · 04-05-2015, 02:26 PM

Ok I will be visiting the cart tomorrow. Will double check the readings. How would I go about correcting this if this is the fault?

TahoeDawgZ71 · 04-05-2015, 02:39 PM

I'm following this thread to see how it develops.

Sergio · 04-05-2015, 02:47 PM

You can disconnect the 16-pin connector from the controller and the 3-pin connector from the MCOR.

Measure the resistance on each of the wires from the controller to the MCOR.

You should see approximately 451Ω, if you measure 0Ω instead, you have the wrong TPS adapter for an Excel cart.

scooterman · 04-05-2015, 02:47 PM

TPS (throttle position sensor?) Where would this be if not the MCOR?

Romrok · 04-05-2015, 02:55 PM

Yea, got that. But how do I get the correct unit if the part number is the same?

TahoeDawgZ71 · 04-05-2015, 03:06 PM

What's the part number on the TPS adapter?

TahoeDawgZ71 · 04-05-2015, 03:10 PM

Sergio,

There must have been a misunderstanding somewhere. I don't recall ever saying the iq and excel adapters had the same part numbers. They are in fact different, but the IQ one is no longer available.
103682701 is the correct number for Excel cars

scooterman · 04-05-2015, 03:11 PM

David where is this adapter, I don't remember seeing it on mine?

04-05-2015, 01:12 PM	#1
Romrok Not Yet Wild Join Date: Aug 2012 Posts: 38	Precedent shutdown at full throttle. Excel Hi all, This one has been troubling me for a bit. From the beginning, Cart smoked its controller. You could smell the electrical burnt smell near it. Got a refurbished excel controller with speed 4 installed. Put it in and the cart started running again except if the throttle is all the way down the cart stopped accelerating and regen braking slows it down, back off on the throttle and it starts going again. Plugged in the IQDM P and watch the throttle position. Somewhere around 90 percent it drops to zero and gives you the above symptoms. I go for that as mcor issue and order replacement. No change. Searching around on here. I find a thread that TDawg answered on. The tps adaptor has failed. Ordered that, replaced, and still no change. Now I have come full circle to the controller, is it possible this is a programming issue with the rebuilt controller, or just a defect, and it thinks its going out of range? Or is there something else I should look for? Thanks for the help Rom
Romrok Not Yet Wild Join Date: Aug 2012 Posts: 38

04-05-2015, 02:11 PM	#2
Sergio Gone Wild Join Date: Sep 2012 Location: Charlotte, NC Posts: 9,329	Re: Precedent shutdown at full throttle. Excel Measure the actual voltage on the yellow MCOR wire in relation to pack negative (meter on 20v DC scale). The last time the TPS to MCOR adapter was discussed, TahoeDawg said that both versions (IQ and Excel) had the same part number. I have no idea how the dealer can tell which ones have the resistors internally (Excel model) and which one don't (IQ model). The 451Ω resistors will change the throttle signal as seen by the controller from 0-5v to 0.35-4.65v, so if You don't have the resistors in yours, it will give you a throttle fault (out of range) if it goes to 5v.

04-05-2015, 02:26 PM	#3
Romrok Not Yet Wild Join Date: Aug 2012 Posts: 38	Ok I will be visiting the cart tomorrow. Will double check the readings. How would I go about correcting this if this is the fault?
Romrok Not Yet Wild Join Date: Aug 2012 Posts: 38

04-05-2015, 02:39 PM	#4
TahoeDawgZ71 revolutiongolfcars.com Join Date: Mar 2010 Location: Golf Car Capital of The World... Augusta, Georgia Posts: 10,224	Re: Precedent shutdown at full throttle. Excel I'm following this thread to see how it develops.

04-05-2015, 02:47 PM	#5
Sergio Gone Wild Join Date: Sep 2012 Location: Charlotte, NC Posts: 9,329	Re: Precedent shutdown at full throttle. Excel You can disconnect the 16-pin connector from the controller and the 3-pin connector from the MCOR. Measure the resistance on each of the wires from the controller to the MCOR. You should see approximately 451Ω, if you measure 0Ω instead, you have the wrong TPS adapter for an Excel cart.

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04-05-2015, 02:47 PM	#6
scooterman Gone Wild Join Date: Jan 2014 Location: Lafayette, Louisiana Posts: 1,677	Re: Precedent shutdown at full throttle. Excel TPS (throttle position sensor?) Where would this be if not the MCOR?

04-05-2015, 02:55 PM	#7
Romrok Not Yet Wild Join Date: Aug 2012 Posts: 38	Yea, got that. But how do I get the correct unit if the part number is the same?
Romrok Not Yet Wild Join Date: Aug 2012 Posts: 38

04-05-2015, 03:06 PM	#8
TahoeDawgZ71 revolutiongolfcars.com Join Date: Mar 2010 Location: Golf Car Capital of The World... Augusta, Georgia Posts: 10,224	Re: Precedent shutdown at full throttle. Excel What's the part number on the TPS adapter?

04-05-2015, 03:10 PM	#9
TahoeDawgZ71 revolutiongolfcars.com Join Date: Mar 2010 Location: Golf Car Capital of The World... Augusta, Georgia Posts: 10,224	Re: Precedent shutdown at full throttle. Excel Sergio, There must have been a misunderstanding somewhere. I don't recall ever saying the iq and excel adapters had the same part numbers. They are in fact different, but the IQ one is no longer available. 103682701 is the correct number for Excel cars

04-05-2015, 03:11 PM	#10
scooterman Gone Wild Join Date: Jan 2014 Location: Lafayette, Louisiana Posts: 1,677	Re: Precedent shutdown at full throttle. Excel David where is this adapter, I don't remember seeing it on mine?

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