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Unread 10-11-2012, 03:54 PM   #31
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Default Re: Alltrax Controller Problem in Precedent

I work on these things every day....each cart is different. You can have similar symptoms, and different problems. With that said, you are free to call BS. I just know I trouble shoot these carts daily, and the experiences I have teach me new stuff every day....I may be still learning, but I am keeping an open mind as well...

PS. My cart and three others were fine prior to the Alltrax install. The described jerky behavior totally disappeared after a MCOR was "thrown at the problem"...maybe just coincidence...maybe not.
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Unread 10-11-2012, 08:28 PM   #32
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Default Re: Alltrax Controller Problem in Precedent

Quote:
Originally Posted by DJBlade View Post
I work on these things every day....each cart is different. You can have similar symptoms, and different problems. With that said, you are free to call BS. I just know I trouble shoot these carts daily, and the experiences I have teach me new stuff every day....I may be still learning, but I am keeping an open mind as well...

PS. My cart and three others were fine prior to the Alltrax install. The described jerky behavior totally disappeared after a MCOR was "thrown at the problem"...maybe just coincidence...maybe not.
Ok, I am keeping an open mind and would like to look into this further, as I would like to smooth out the cart and increase my throttle up rate.

So, is there a way to test the MCOR currents/signals? If so can someone post how? What type reading would indicate a weak or failing MCOR? If you are on to something here I would gladly spend the $145 for a new MCOR.

The only reason I am so skepticle is because so many experience the same problem and it is hard for me to imagine it is all bad MCOR's when they were working fine on the stock system. But lets get on with figuring out how to test this out?
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Unread 10-11-2012, 08:48 PM   #33
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Default Re: Alltrax Controller Problem in Precedent

First, look around, they can be had cheaper than that if you look hard enough, Is yours a DS or a Precedent?

Second, regardless of style here are the procedures for trouble shooting an MCOR. I have seen though, MCORs pass most of these tests but still be choppy.

MCOR Voltage Test without the IQDM Handset
1. Place chocks at the front wheels and lift the rear of the vehicle with a chain hoist or floor jack. Position jack stands under the frame crossmember between the spring mount and side stringer, just forward of each rear wheel. See WARNING “Lift only one end...” in General Warning, Section 10, Page 10-1.
See following NOTE.
NOTE: The key switch should be placed in the OFF position and left in the OFF position for the duration of
this test.

2. With the batteries connected, place Tow/Run switch in RUN. Using a multimeter set to 200 volts DC, place red (+) probe on battery no. 1 positive post and place black (–) probe (with insulation-piercing probe) on the purple/white wire (1) at a point close to the three-pin connector at the MCOR (Figure 11-11). The reading should be approximately 48-50 volts (full battery voltage).

3. If reading is zero volts, check the purple/white wire continuity from the three-pin connector at the MCOR to the 24-pin connector at the speed controller. Check terminal positions in three-pin connector at the
MCOR and the 24-pin connector. If all of the continuity readings are correct and the connectors are wired correctly, replace the speed controller.

4. With multimeter set to 20 volts DC, place the black (–) probe on battery no. 8 negative post and the red (+) probe (with insulation-piercing probe) on the white wire (2) at a point close to the three-pin connector at the MCOR (Figure 11-12). The reading should be approximately 4.65 volts.

5. If reading is zero volts, check the white wire continuity from the three-pin connector at the MCOR to the 24-pin connector at the speed controller. Check terminal positions in three-pin connector at the MCOR and the 24-pin connector. If all of the continuity readings are correct and the connectors are wired correctly,replace the speed controller.

6. With multimeter set to 20 volts DC, place the black (–) probe on battery no. 8 negative post and the red (+) probe (with insulation-piercing probe) on the yellow wire (3) at a point close to three-pin connector at the MCOR (Figure 11-13). The reading should be approximately 0.32 volts with the pedal up. Slowly press the accelerator pedal and note the readings on the multimeter. As the pedal is pressed, the reading should increase until it reaches 4.65 volts when the pedal is fully pressed.

7. If reading does not increase as the pedal is pressed, replace the MCOR.

8. If the reading is not approximately 4.60 volts with the pedal fully pressed, the vehicle will not operate at rated top speed. Check the MCOR resistance.

8.1. Disconnect the battery cables as instructed. See WARNING “To avoid unintentionally starting...” in General Warning, Section 10, Page 10-1.

8.2. Disconnect the 24-pin connector at the speed controller.

8.3. Set a multimeter to 20k ohms. Connect the red (+) probe of the multimeter to the yellow wire at the MCOR three-pin connector with an insulation piercing probe. Connect black (–) probe to the purple/
white wire with an insulation-piercing probe.

8.4. With the accelerator pedal fully up (not pressed), the multimeter should read approximately 1k ohms.

8.5. Slowly press the accelerator pedal while monitoring the multimeter. The resistance should rise as the pedal is pressed. When the pedal is all the way to the floor, the multimeter should indicate between 5.67k ohms and 7.43k ohms.

8.6. Using a multimeter set for 20k ohms, connect the red (+) probe of the multimeter to the yellow wire at the MCOR three-pin connector with an insulation piercing probe. Connect black (–) probe to the white wire with an insulation-piercing probe.

8.7. With the accelerator pedal fully up (not pressed), the multimeter should indicate between 5.67k ohms and 7.43k ohms.

8.8. Slowly press the accelerator pedal while monitoring the multimeter. The resistance should drop as the pedal is pressed. When the pedal is all the way to the floor, the multimeter should indicate approximately 1k ohms.

8.9. If the MCOR does not operate as described, replace the MCOR.
Attached Images
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File Type: jpg mcor3.JPG (28.7 KB, 0 views)
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Unread 10-11-2012, 09:30 PM   #34
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Default Re: Alltrax Controller Problem in Precedent

Nicely done Cheapjeep2, but if most pass the test, maybe, in an effort to try to find a solution to this Alltrax herky jerkiness that perhaps I should just go for it and replace mine and then I could post results. If it solves the problem I know a lot of people here who will be very happy.

So, in an effort to be open minded I am gunna order one. I have a 2008 Precedent IQ, so do you have any idea as to what part number I should look for to make sure I get the right MCOR?
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Unread 10-11-2012, 09:38 PM   #35
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Default Re: Alltrax Controller Problem in Precedent

New MCOR ordered, will update when installed.
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Unread 10-12-2012, 07:23 AM   #36
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Default Re: Alltrax Controller Problem in Precedent

Speed, what is your setup on your Alltrax controller, specifically your Throttle up rate?
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Unread 10-12-2012, 09:22 AM   #37
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Default Re: Alltrax Controller Problem in Precedent

Quote:
Originally Posted by cheapjeep2 View Post
Speed, what is your setup on your Alltrax controller, specifically your Throttle up rate?
My throttle up is at 2 or 3, jerky if I try to start too slow but pretty smooth at half to full throttle. The inductive curve was the smoothest but only got 90% throttle. Altrax sent me a new map that gave me 100% throttle but it was not as smooth as inductive. I think I am using the custom map but I cannot remember.
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Unread 10-12-2012, 03:39 PM   #38
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Default Re: Alltrax Controller Problem in Precedent

Quote:
Originally Posted by Speedchaser View Post
My throttle up is at 2 or 3, jerky if I try to start too slow but pretty smooth at half to full throttle. The inductive curve was the smoothest but only got 90% throttle. Altrax sent me a new map that gave me 100% throttle but it was not as smooth as inductive. I think I am using the custom map but I cannot remember.
Did they send you CLUBCAR3.hex or CLUBCAR4.hex?

4 seems to be the smoothest.
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Unread 10-12-2012, 04:29 PM   #39
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Default Re: Alltrax Controller Problem in Precedent

No, they sent me clubcar5.hex

I can post it if anyone is interested.
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Unread 10-12-2012, 05:23 PM   #40
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Default Re: Alltrax Controller Problem in Precedent

Alltrax sent me the CLUBCAR3 AND CLUBCAR5, I would like to try the 4 on mine just to see..
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