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CONTROLLER DIAGNOSTIC TOOL (CDT)
Fault Descriptions
11
large solenoids should read 180 to 190 ohms; small solenoids 200 to 250 ohms), a broken blue/white wire at the 16-pin
controller plug or its terminal is loose in the 16-pin plug.
MAIN DROPOUT (1 OR 2)
If the controller detects that the solenoid contacts have opened while the vehicle is in operation, a
main dropout
fault
is detected.
What it means:
Occurs when the solenoid coil losses ground causing the main contact to lose connection. With Main
Dropout 2, the solenoid drops out while the vehicle is in regen/motor braking. Main Dropout 2 is usually a symptom
more than a cause.
What to do:
Check the following components: key switch, MCOR, batteries, battery cables, FNR, solenoid coil,
solenoid contacts, and controller 16-pin connector.
MOTOR STALL
If the motor current is high and there is no movement of the vehicle wheels for a short period of time, a
motor stall
is
detected by the speed controller. This fault can be caused by an operator holding the vehicle on a hill by depressing
the accelerator pedal instead of the brake pedal.
What it means:
This fault appears anytime current is running to the motor and no movement of the armature
is registered.
What to do:
In most cases this is an operator issue holding the vehicle on an incline with the accelerator pedal,
not the brake pedal.
See following NOTE.
NOTE:
In rare cases, it could be a controller or drivetrain issue. If the vehicle rolls, the drivetrain is okay. Check to see
if Armature Current spikes to 250 amps when accelerator pedal is pressed. If so, replace 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.
What it means:
This is the exact opposite of
main driver on
. The controller FET controlling the energizing of the
solenoid is off (or not energized) when it should be.
What to do:
Replace controller.
CURRENT SENSE FAULT
What it means:
If there are problems with the armature current sensor circuitry, a
current sense
fault is detected and
the controller de-energizes the solenoid coil.
What to do:
Clear the Fault History in the CDT. If the fault does not return and the car operates normally, do
not replace the controller. If the fault remains in System Faults or Fault History after clearing and the car will not
operate, replace the controller.
M– SHORTED
If an uncontrolled current path is detected from the motor to B- (bypassing the MOSFETs), an M- shorted fault
is detected.
2020 Precedent,Villager 2 and 4 Maintenance and Service Manual
Page 11-21
Summary of Contents for DS Villager 4
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Page 481: ...GASOLINE ENGINE HARNESS Wiring Diagrams Gasoline Engine Harness 26 ...
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Page 483: ...GASOLINE MAIN HARNESS Wiring Diagrams Gasoline Main Harness 26 ...
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Page 485: ...GASOLINE INSTRUMENT PANEL HARNESS Wiring Diagrams Gasoline Instrument Panel Harness 26 ...
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Page 489: ...ELECTRIC MAIN HARNESS Wiring Diagrams Electric Main Harness 26 ...
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Page 495: ...ELECTRIC LIGHT HARNESS Wiring Diagrams Electric Light Harness 26 ...
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Page 497: ...ELECTRIC DC TO DC CONVERTER HARNESS Wiring Diagrams Electric DC to DC Converter Harness 26 ...
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Page 507: ...NOTES ...
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