Club Car 2009-20011 Electric Precedent Maintenance And Service Manual page 179

IQ SYSTEM TROUBLESHOOTING – MCOR
TEST PROCEDURE 19 – Onboard Computer Gray Wire
See General Warnings on page 1-1.
1. With batteries connected and the DC cord disconnected, pull back on the boot (1) on the gray wire (2) connection
at the OBC (3) (Figure 12-22, Page 12-33). Using a multimeter set to 200 volts DC, connect the red (+) probe to
the positive post of battery no. 1 and black (–) probe to gray 16-gauge wire at the OBC connection (4). Reading
should be approximately 48 volts. If reading is zero volts, replace the OBC.
4
693
Figure 12-22 OBC Connections
2. If the reading in step 1 is 48 volts, plug the DC cord into the vehicle's charger receptacle. The voltage reading
should drop to approximately 4.0 volts before the charger relay clicks on.
3. When the charger relay is activated, the reading should rise to approximately 48 volts.
4. If voltage does not drop to approximately 4.0 volts when the DC cord is plugged in and then rise to approximately
48 volts when the charger relay clicks on, the gray wire circuit in the OBC has failed. Replace the OBC.
TEST PROCEDURE 20 – Voltage at Charger Receptacle Red Wire Socket
See General Warnings on page 1-1.
1. With batteries connected, DC cord disconnected, and using a multimeter set to 200 volts DC, place the black
(–) probe on the negative post of battery no. 4 (4 x 12-Volt battery set) or battery no. 6 (6 x 8-Volt battery set)
and place the red (+) probe on the charger receptacle socket connected to the red 10-gauge wire. The reading
should be 48-50 volts (full battery voltage).
2. If the reading is zero volts, check the continuity of the 10-gauge red wire from the positive post of battery no. 1
to the receptacle socket.
1
2
3
2009-2011 Electric Precedent Maintenance and Service Manual
12
Test Procedures
Page 12-33