12
Test Procedures
ELECTRICAL SYSTEM TROUBLESHOOTING:
IQ PLUS ELECTRIC VEHICLES
4.1.
Locate and connect an insulation-piercing probe to the pin 1 tan wire in the 24-pin connector.
4.2.
With the key switch in the OFF position and the accelerator pedal at rest, the tan wire should show zero (0)
volts.
4.3.
With the key switch in the ON position and the accelerator pedal pressed, the tan wire should show BPV
which is KEY INPUT (ON position) to controller.
– If it shows BPV, then the key switch and related wiring is functioning properly.
– If not, first check the key switch.
5.
Key Switch:
Remove instrument panel to access the back of the key switch but do not disconnect wires.
Instrument Panel Removal, Section 4, Page 4-10.
5.1.
With the key switch in the OFF position:
– The green wire should show BPV coming to the switch.
– The blue wire should show zero (0) volts. If it shows BPV, the switch has failed CLOSED and must
be replaced.
5.2.
With the key switch in the ON position:
– The blue wire should show BPV passing through the key switch to the MCOR. If it does not show BPV,
the switch has failed OPEN and must be replaced.
6.
MCOR Limit Switch (FOOT INPUT):
Access the MCOR from under the vehicle passenger side.
6.1.
With the key switch in the ON position:
– With an insulation-piercing probe, check voltage of the blue wire in the MCOR 2-pin connector. It should
show BPV coming to the MCOR. If not, check wiring.
– With an insulation-piercing probe, check voltage of the green wire in the MCOR 2-pin connector. It should
show zero (0) volts with the accelerator pedal at rest. Press the accelerator pedal and the green wire
should show BPV passing through the MCOR to the controller for FOOT INPUT. From the MCOR, the
blue wire supplies voltage (BPV) to pin 8. If not, replace MCOR.
See MCOR Removal on page 13-6.
TEST PROCEDURE 8 – Forward/Reverse Rocker Switch
See General Warnings on page 1-1.
NOTE:
This is a voltage test.
The Forward/Reverse Switch provides FORWARD INPUT and REVERSE INPUT to the controller.
If the controller sees both FORWARD INPUT and REVERSE INPUT at the same time, the reverse buzzer will
sound in all FNR positions and the vehicle will not operate in either direction. Common causes of this include
corrosion across the contacts inside the switch, water inside the switch, or a switch that has failed CLOSED.
Forward/Reverse Rocker Switch Test with the CDT Handset
1.
Turn the key switch to the OFF position and place the Forward/Reverse switch in the NEUTRAL position.
2.
Connect the CDT to the vehicle.
See Plugging the CDT into the Vehicle, Section 11, Page 11-2.
3.
Test FORWARD INPUT.
3.1.
Access the Monitor menu and select FORWARD INPUT by using the SCROLL DISPLAY buttons. The CDT
should indicate OFF when the Forward/Reverse switch is in the NEUTRAL or REVERSE position.
3.2.
Place the Forward/Reverse switch in the FORWARD position. The CDT should indicate that FORWARD
INPUT is ON. If the CDT indicates any other reading, check vehicle wiring.
See Wiring Diagrams
beginning on page 12-4
. Also check the 24-pin connector at the speed controller.
4.
Test REVERSE INPUT.
Page 12-24
2017 Carryall 500 and 700 Maintenance and Service Manual
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