IQ SYSTEM TROUBLESHOOTING
Troubleshooting
11
•
Pedal Up Motor Braking:
When vehicle speed is above 11 mph (17.7 km/h), releasing the accelerator pedal will
activate motor braking, which slows the vehicle speed. Once vehicle speed slows to below approximately 11 mph
(17.7 km/h), with the accelerator pedal still released, motor braking will be deactivated and the vehicle will coast
freely. This feature is selectable. Contact your Club Car dealer/distributor to inquire about this selectable feature.
•
Regenerative Braking
: When motor braking is activated, the vehicle motor acts as a generator, slowing the vehicle
as it creates energy that is used to charge the batteries.
•
Tow/Run Switch:
When the Tow/Run switch is in the RUN position, the vehicle will function normally. When the
switch is in the TOW position, power to the OBC and controller is shut off, disabling the vehicle operating circuit and
walk away braking, allowing the vehicle to be towed.
•
Motor Protection Circuit:
The operator should never attempt to hold the vehicle on an incline by pressing the
accelerator pedal instead of the brake pedal, as motor overheating could result. By reducing the current to the
motor during such an occurrence, the motor protection circuit reduces the possibility of motor damage. When this
situation arises, a
motor stall fault
is recorded by the speed controller and will be displayed on an IQDM handset in
the Diagnostic History menu.
See Motor Stall on page 13-11.
•
High Pedal Detect:
This function prevents unexpected vehicle movement if the key switch is turned ON after the
accelerator is pressed, or the accelerator pedal is pressed when Forward/Reverse switch is used to change the
direction of travel. The vehicle will not move until the accelerator is released and pressed again. When this
situation arises, a
HPD fault
is recorded by the speed controller and will be displayed on an IQDM handset in the
Diagnostic History menu.
See HPD on page 13-11.
•
Onboard Computer (OBC):
The OBC, 1) monitors battery condition, 2) monitors the number of energy units used
by the vehicle, 3) determines the number of energy units required to recharge the batteries and shuts the charger
off when this number is reached, 4) determines when to activate regenerative motor braking, 5) locks out vehicle
movement while the charger is plugged into the vehicle charger receptacle, 6) stores operating data, which can be
read by the Communication Display Module (CDM).
See Communication Display Module (CDM) on page 11-35.
TROUBLESHOOTING
The following troubleshooting guides will be helpful in identifying operating difficulties should they occur. The guides
include the symptom, probable cause(s) and suggested checks. The procedures used in making these checks can be
found in the referenced sections of this maintenance and service manual.
TROUBLESHOOTING THE VEHICLE WITH THE IQDM
NOTE:
2009 Precedent IQ electric vehicles equipped with the Gen II Pedal Assembly will produce a reoccurring
Throttle Fault 1 fault code registered in the vehicle’s controller fault history when taking readings with the
IQDM diagnostic module. This occurs due to the Gen II Pedal Assembly having a modular electric throttle with
a throttle position sensor instead of an MCOR. The 1510 series controller that is used with IQ System cars
requires a constant low voltage signal from the MCOR to signal there’s no broken wires, loose connector
plugs, etc. between the controller and MCOR. The throttle position sensor loses this connection when the key
switch is turned off prompting the controller to instantly register the appropriate Throttle Fault 1 code in fault
history. The code can be cleared but will return every time the key switch is turned OFF. It has no ill effect
on the operation of the vehicle and should not be interpreted as a fault that necessitates replacement of the
vehicle’s accelerator pedal assembly that contains the throttle position sensor.
There are circumstances where a legitimate Throttle Fault 1 fault code will register. If the vehicle does have
an issue with the throttle position sensor or it’s wiring, the fault code will be present in the Current Faults menu
with the key switch in the ON position. This will also most likely be accompanied by a non-operational vehicle.
The Excel system uses a 1515 series controller that has software preventing this fault code from registering
when the key is switched off. Future IQ system controllers will have software to prevent this as well.
2009 Electric Precedent Maintenance and Service Manual
Page 11-7
