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IQ DISPLAY MODULE (IQDM) SERIES 2 AND IQDM-P DIAGNOSTICS
Faults Menu
Page 12-8
2008-2011 IQ System Electric Vehicle Maintenance and Service Supplement
12
Depending on the type of fault, the controller will attempt to recover immediately after the condition clears or
after the accelerator pedal has been cycled (released and pressed again).
The following faults can be detected by the IQ System controller:
HW Failsafe
The armature drive FET’s (field effect transistors) regulate the armature current. If the speed controller
detects a failure of the armature drive FET’s or circuitry, a
hardware failsafe
fault is detected.
Throttle Fault 1
If the MCOR (Motor Controller Output Regulator) voltage is less than 0.20 volts or greater than 4.80 volts, the
controller detects a
throttle fault
.
Speed sensor
If the speed controller does not detect pulses from the speed sensor while the controller outputs power
(greater than 75% armature PWM) to the motor, a
speed sensor
fault is detected.
CONTROLLER
FAULT
CONTROLLER FAULT
CODE
CONTROLLER ATTEMPTS
TO RECOVER
HW FAILSAFE
24
When key switch is cycled
THROTTLE FAULT 1
28
When condition clears
SPEED SENSOR
18
When condition clears
MAIN WELDED
8
When condition clears
MAIN DRIVER ON
15
When condition clears
MAIN DRIVER OFF
14
When accel. pedal is cycled
MAIN CONT DNC
-
When accel. pedal is cycled
MAIN COIL FAULT
13
When accel. pedal is cycled
FIELD MISSING
26
When accel. pedal is cycled
HPD
4
When accel. pedal is cycled
PROC/WIRING
30
When condition clears
OVERVOLTAGE
9
When condition clears
UNDERVOLTAGE
-
When condition clears
THERMAL CUTBACK
2
When condition clears
MOTOR STALL
20
When condition clears
MAIN DROPOUT
11
When accel. pedal is cycled
OPEN ARMATURE
23
When condition clears and
accel. pedal is cycled
MAX PASSWORD TRIES
7
When Tow/Run switch is
cycled
INCORRECT PASSWORD
6
When Tow/Run switch is
cycled
HIGH SPEED WALKAWAY
5
When Tow/Run switch is
cycled
KEY SWITCH SRO
3
When Key Switch is cycled