Club Car 2007 XRT 800, Руководство по техническому обслуживанию

Страница: 392 / 516

ELECTRICAL SYSTEM AND TESTING: ELECTRIC VEHICLE Troubleshooting
Page 21-28 2007-2008 XRT 800, 810 and 850 Maintenance and Service Manual
21
TEST PROCEDURE 10 – ONBOARD COMPUTER SILICON-CONTROLLED
RECTIFIER (SCR) CIRCUIT
See General Warning on page 1-1.
The silicon controlled rectifier (SCR), located inside the onboard computer, acts as a switch on the negative
side of the circuit.
This allows the onboard computer (OBC) to control the battery charging current.
Use the following procedure to test the SCR:
1. With batteries connected and a multimeter set to 200 volts DC, place the red (+) probe on the positive
post of battery no. 1 and place the black (–) probe on the charger receptacle fuse terminal that has the
black 10-gauge OBC wire attached to it. The reading should be approximately 36-42 volts.
2. If the reading is zero volts, check the black 10-gauge wire connections at the controller and receptacle.
Check the continuity of the black 10-gauge wires. If the wires and connections are okay, the SCR has
failed. Replace the OBC. If the reading is correct, proceed to the following step.
3. Plug in AC and DC cords. When the battery charger relay clicks on, reading should be approximately 48
volts (full battery voltage). If the reading does not rise from approximately 40 volts to full battery voltage
when the DC cord is plugged in and the relay clicks on, check the following items:
• Charger receptacle fuse and black wire terminal socket in the charger receptacle.
• Onboard computer gray wire and fuse. See Test Procedure 11 – Onboard Computer Gray Wire and
Fuse on page 21-28.
• Red wire at the charger receptacle. See Test Procedure 12 – Voltage at Charger Receptacle Red
Wire Socket on page 21-28.
TEST PROCEDURE 11 – ONBOARD COMPUTER GRAY WIRE AND FUSE
See General Warning on page 1-1.
1. With batteries connected and a multimeter set to 200 volts DC, connect the red (+) probe to the positive
post of battery no. 1 and black (–) probe (with insulation-piercing probe) to gray 16-gauge wire at a point
between fuse and receptacle. Reading should be approximately 48 volts. If reading is zero volts, check
gray wire fuse and fuse holder for continuity.
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 12 – VOLTAGE AT CHARGER RECEPTACLE RED WIRE
SOCKET
See General Warning on page 1-1.
1. With batteries connected and a multimeter set to 200 volts DC, place the black (–) probe on the negative
post of battery no. 4 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.