IQ DISPLAY MODULE (IQDM) SERIES 2 AND IQDM-P DIAGNOSTICS
Faults Menu
2008-2011 IQ System Electric Vehicle Maintenance and Service Supplement
Page 12-9
12
Main Welded
If the speed controller detects that the solenoid contacts are welded closed, a
main welded
fault is detected.
Main Driver On
If the FET that controls the closing of the solenoid contacts is found to be energized when it should not be, a
main driver on
fault is detected by the speed controller.
Main Driver Off
If the FET that controls the closing of the solenoid is
not
energized when it should be, a
main driver off
fault
is detected by the speed controller.
Key Switch SRO
If the key switch is in the ON position when the controller powers up, a KSI SRO fault will be detected. The KSI
SRO fault detenction feature can be turned on or off with an IQDM-P.
Main Cont DNC
The
main cont dnc
(main contactor (solenoid) did not close) fault is detected when the speed controller has
sent voltage to the solenoid activating coil but the solenoid contacts are not closed.
Main Coil FAULT
If the speed controller determines that the solenoid is not closing as a result of a solenoid coil failure, a
main
coil fault
is detected.
Field Missing
If the speed controller is operating at a duty cycle of greater than 90% (almost full speed) and the field current
is less than 3 amps, a
field missing
fault is detected by the speed controller.
HPD
The
HPD
(High Pedal Detect) fault is detected if the accelerator pedal is already depressed when the key
switch is turned to the ON position. This fault is also detected if the accelerator pedal is pressed when the
selected direction is changed by pressing the Forward/Reverse switch. This fault, when not caused by the
operator, can indicate that the pedal limit switch has failed closed.
Proc/Wiring
This fault is detected if the Forward/Reverse switch is giving a signal to place the controller in forward and
reverse at the same time. This rare fault can be caused by a failed Forward/Reverse switch or improper vehi-
cle wiring.
High Speed Walkaway
If the key switch is turned off while going downhill at high speed, a High Speed WalkAway fault is detected.
Overvoltage
If the speed controller detects that the battery voltage is too high (68.4 to 75.6 volts DC), the
overvoltage
fault
is detected.
Undervoltage
If the battery voltage falls below 34 volts ±5%, the
low battery voltage
fault is detected by the speed controller.
Thermal Cutback
If the controller heatsink temperature is found to be in excess of 85 °C ±5 °C (185 °F ±9 °F) or below –25 °C
±5 °C (–13 °F ±9 °F), the
thermal cutback
fault is detected.