ELECTRICAL SYSTEM AND TESTING
Troubleshooting
Page 11-14
2008-2011 IQ System Electric Vehicle Maintenance and Service Supplement
11
TROUBLESHOOTING GUIDE 2
TROUBLESHOOTING GUIDE 2
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
Vehicle does not operate
Batteries discharged
Charge batteries
Improper or poor battery connections
Check vehicle wiring.
Battery charger is connected to the
vehicle – Solenoid lockout feature has
disabled the vehicle
Disconnect the battery charger from the
vehicle
Onboard computer failure
Test Procedure 2 – Onboard Computer
Solenoid Lockout Circuit on page 11-18
Key switch and MCOR limit switch circuit
Check for loose or disconnected wires at
key switch and MCOR
Failed key switch
Test Procedure 8 – Key Switch and
MCOR Limit Switch Circuit on page 11-23
Failed MCOR
Test Procedure 8 – Key Switch and
MCOR Limit Switch Circuit on page 11-23.
See also Test Procedure 4 – MCOR
Voltage on page 11-19.
Forward/Reverse rocker switch
Test Procedure 15 – Forward/Reverse
Rocker Switch on page 11-38
Solenoid – loose wires
Test Procedure 3 – Solenoid Activating
Coil on page 11-19
Solenoid – failed coil
Test Procedure 3 – Solenoid Activating
Coil on page 11-19
Solenoid – failed solenoid diode
Test Procedure 3 – Solenoid Activating
Coil on page 11-19
Speed controller thermal cutback
Allow controller to cool and ensure that
vehicle is not over-loaded before returning
to operation
16-pin connector at speed controller
Check for loose or disconnected wires at
the 16-pin connector.
See also Test
Procedure 9 – 16-Pin Connector on
page 11-25.
High pedal detect
Cycle accelerator pedal
Motor stall
Cycle accelerator pedal
Motor failure
Section 16 – Motor
Failed Tow/Run switch
Test Procedure 6 – Tow/Run Switch on
page 11-21
Failed (open) diode
Test Procedure 9F – Pin 9 on page 11-32
Speed controller failure
Controller Removal, Section 13,
Page 13-11.
Troubleshooting Guide continued on next page...