Club Car Carryall 300 2018 Maintenance And Service Manual page 183

EXCEL SYSTEM TROUBLESHOOTING: WITH
ERIC CHARGING
MCOR Voltage Test without the CDT 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. See also following WARNING.
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, place Run/Tow 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 at a point close to the three-pin connector at the MCOR. The reading should be approximately
48 to 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
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. 6 (6 x 8-Volt battery set) negative post
and the red (+) probe (with insulation-piercing probe) on the white 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 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.
6. With multimeter set to 20 volts DC, place the black (–) probe on battery no. 6 (6 x 8-Volt battery set) negative post
and the red (+) probe (with insulation-piercing probe) on the yellow wire at a point close to three-pin connector
at the MCOR. The reading should be zero (0) 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
approximately 4.65 volts when the pedal is fully pressed.
7. If reading does not increase as the pedal is pressed, replace the MCOR. See following NOTE.
NOTE: Observe closely to see if voltage randomly or sporadically fluctuates with pedal at rest, during pedal travel and
with pedal fully pressed. If it fluctuates, the MCOR is defective and must be replaced.
2018 Carryall 300 Maintenance and Service Manual
12
Test Procedures
Page 12-29