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ELECTRICAL SYSTEM AND TESTING: ELECTRIC VEHICLE
Troubleshooting
Page 21-12
2007-2008 XRT 800, 810 and 850 Maintenance and Service Manual
21
4. If reading is zero volts, plug the charger DC cord into the vehicle charger receptacle. If the dash light illu-
minates for 10 seconds, the OBC is now powered-up. Unplug the DC cord; the reading at the OBC blue
wire should be approximately 48-50 volts. If the vehicle now operates normally, the DC cord has powered
up the electrical system. The electrical system should also power-up when the accelerator pedal is
pressed. To check the accelerator pedal function, see Test Procedure 4 – MCOR Voltage on page 21-12.
5. If the dash light illuminates for 10 seconds and the vehicle does not operate:
5.1. Set a multimeter to 200 volts DC. Place black (–) probe on battery number 4 and place red (+) probe
(with insulation-piercing probe) on blue 18-gauge wire at OBC six-pin connector.
5.2. With Tow/Run switch in the RUN position, the voltage reading should be approximately 48 volts.
6. If the dash light does not illuminate and the vehicle does not operate, check the OBC activation circuit.
6.1. Set a multimeter to 200 volts DC. Place the black (–) probe on the battery no. 4 negative post and
place the red (+) probe (with insulation-piercing probe) on the red 18-gauge wire located on the
OBC side of the six-pin connector. The reading should be approximately 48 volts. If the reading is
incorrect, test the Tow/Run switch and connecting wires.
See Test Procedure 6 – Tow/Run Switch
on page 21-15.
6.2. Set a multimeter to 200 volts DC. Place the black (–) probe on the battery no. 4 negative post and
place the red (+) probe (with insulation-piercing probe) on the red 18-gauge wire (harness side of
six-pin connector). Multimeter should indicate 48 volts. If voltage is correct, check connections in
the six-pin connector. If connections are correct, OBC activation circuit has failed. Replace OBC.
TEST PROCEDURE 3 – SOLENOID ACTIVATING COIL
See General Warning on page 1-1.
Place red (+) probe of the multimeter on the positive (+) solenoid terminal. Place the black (–) probe on the
other small solenoid terminal. A reading of 180 to 190 ohms should be obtained
(Figure 21-4, Page 21-12)
.
If not, replace the solenoid.
TEST PROCEDURE 4 – MCOR VOLTAGE
See General Warning on page 1-1.
The accelerator position, which is proportional to the MCOR voltage, can be displayed with the diagnostic
handset. If a handset is not available, proceed to MCOR Voltage Test without the Diagnostic Handset on
page 21-13.
Figure 21-4 Activating Coil Test
+
2m
20
m
200
m
2k
200
200
200
200
20
2
200
m
500
20k
200k
2000
k
1000
OFF
WAVETEK
5XL
V
V
V
A
!
!
COM
200nA
MAX
1000 ---
750V
FUSED
SOLENOID
2k OHM SETTING
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