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Unread 02-07-2015, 11:45 PM   #31
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Default Re: Help

K9 Keno,
How fast is your cart now? What MPH on a level surface are you getting?
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Unread 02-07-2015, 11:53 PM   #32
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Default Re: Help

Quote:
Originally Posted by scubabud View Post
K9 Keno,
How fast is your cart now? What MPH on a level surface are you getting?
When I got it 14.1 14.4 then I put code 5 in it and 15.5 16.0 was it. Its not going as fast as it should only goes 3/4 of what it should
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Unread 02-07-2015, 11:55 PM   #33
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Quote:
Originally Posted by K9 Keno View Post
When I got it 14.1 14.4 then I put code 5 in it and 15.5 16.0 was it. Its not going as fast as it should only goes 3/4 of what it should
I assume you selected the speed setting for code 5?
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Unread 02-08-2015, 12:05 AM   #34
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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 rails just forward of each spring mount. See WARNING “Lift only one
end...” in General Warnings, Section 1, Page 1-2. See also following WARNING.
ύ WARNING
• 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, placeTow/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 wire at a point close to the three-pin connector at the MCOR. The reading should
be approximately 48-50 volts (full battery voltage).
3. If reading is zero volts, check the purple wire continuity from the three-pin connector at the MCOR to the
16-pin connector at the speed controller. Check terminal positions in three-pin connector at the MCOR
and the 16-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. 4 negative post and the red
(+) probe (with insulation-piercing probe) on the white/black wire at a point close to the three-pin connector
at the MCOR. The reading should be approximately 4.65 volts.
5. If reading is zero volts, check the white/black wire continuity from the three-pin connector at the MCOR
to the 16-pin connector at the speed controller. Check terminal positions in three-pin connector at the
MCOR and the 16-pin connector. If all of the continuity readings are correct and the connectors are wired
correctly, replace the speed controller.
ELECTRICAL SYSTEM AND TESTING Test Procedures
Page 11-18 2006-2007 Precedent IQ System Electric Golf Car Maintenance and Service Manual
11
MCOR Voltage Test without the IQDM Handset, Continued:
6. With multimeter set to 20 volts DC, place the black (–) probe on battery no. 4 negative post and the red
(+) probe (with insulation-piercing probe) on the no. 18 yellow wire at a point close to three-pin connector
at the MCOR. 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 Warnings, Section 1, Page 1-1.
8.2. Disconnect the 16-pin connector at the speed controller.
8.3. 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
purple 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/black 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.
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Unread 02-08-2015, 12:16 AM   #35
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If what was said about Code 5 was true, then the reprogramming should make sure you have full pedal along with full amps delivered. If that is the case and the three prong plug is seated properly in your MCOR, then your MCOR would be defective, assuming there is no restriction in the Go Pedal being able to reach the floor when pushed down. I posted in the previous post tests for the MCOR right out of the manual for 2006-2007 Precedents, (if not using the IQDM Handset.)
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Unread 02-08-2015, 12:43 AM   #36
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Quote:
Originally Posted by scubabud View Post
If what was said about Code 5 was true, then the reprogramming should make sure you have full pedal along with full amps delivered. If that is the case and the three prong plug is seated properly in your MCOR, then your MCOR would be defective, assuming there is no restriction in the Go Pedal being able to reach the floor when pushed down. I posted in the previous post tests for the MCOR right out of the manual for 2006-2007 Precedents, (if not using the IQDM Handset.)
Wow thanks lot to digest there. I think I maybe in over my head here.
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Unread 02-08-2015, 12:57 AM   #37
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If you feel confident with your findings then just get a NEW MCOR. Lot's go bad for many reasons. Then you can see what you really get with your Code 5.
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Unread 02-08-2015, 09:31 PM   #38
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I just got back into town. Took a little mini vacation to the woods to do some tractor work. Got your PM and checked out your thread, but it appears Scubabud has beat me to it... Take his advice and test the MCOR. Let us know your findings.
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Unread 02-09-2015, 05:57 PM   #39
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Quote:
Originally Posted by TahoeDawgZ71 View Post
I just got back into town. Took a little mini vacation to the woods to do some tractor work. Got your PM and checked out your thread, but it appears Scubabud has beat me to it... Take his advice and test the MCOR. Let us know your findings.
Well ill keep everyone posted it is currently at a guy who works on carts. He will be checking Mcor and speed sensor. Also checking for faults and see what modes are selected.
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Unread 02-11-2015, 12:50 PM   #40
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UPDATE...... So the cart would only do 14.4 when I got it. The shop put a new speed sensor on the cart and it does 19mph. So I'm thinking that was the problem...... What do you all think??
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