ELECTRICAL SYSTEM AND TESTING
Troubleshooting
2008-2011 IQ Plus Electric Vehicle Maintenance and Service Supplement
Page 11-43
11
6. Place the Forward/Reverse switch in REVERSE. Using a multimeter set to 200 volts DC, place the black
(–) probe on the orange/white wire terminal end (that was disconnected from the reverse buzzer) and
place the red (+) probe on battery no. 1 positive post. The reading should be approximately 48 volts (full
battery voltage).
6.1. If the voltage reading is correct, replace the reverse buzzer.
6.2. If reading is zero volts, check orange/white wire continuity and connection at Pin 19 in 24-Pin con-
nector.
6.3. If there is no continuity in the orange/white wire, or the Pin 19 terminal in the 24-Pin connector is
not properly seated, repair or replace as required.
6.4. If the orange/white wire continuity and 24-Pin connector are correct and there is no voltage at the
orange wire, replace the controller.
TEST PROCEDURE 18 – REBOOTING THE ONBOARD COMPUTER
See General Warning, Section 10, Page 10-1.
It is possible the Onboard Computer (OBC) can become “locked up,” causing the OBC solenoid lockout circuit
to malfunction. If this condition is suspected, restart the computer as follows:
1. Disconnect the batteries and discharge the controller.
See Disconnecting The Batteries on page 10-3.
2. With the Tow/Run switch in the TOW position, connect the battery cables, positive (+) cable first. Tighten
battery terminals to 110 in-lb (12.4 N·m) and coat terminals with Battery Terminal Protector Spray (CC P/
N 1014305) to minimize corrosion.
3. Place Tow/Run switch in the RUN position.
4. Test drive the vehicle. If the problem has been fixed, the vehicle will function normally. If the problem still
exists, refer to Wiring Diagrams beginning on page 11-2.
TEST PROCEDURE 19 – BATTERY WARNING LIGHT
See General Warning, Section 10, Page 10-1.
1. Reboot the OBC and drive the vehicle a short distance. When vehicle is first driven, the battery warning
light should illuminate for 2-3 seconds.
See Test Procedure 18 – Rebooting the Onboard Computer
If the battery warning light does not illuminate when rebooting the OBC, proceed to step
2. Turn key switch OFF, place Tow/Run switch in TOW and place Forward/Reverse rocker switch in NEU-
TRAL.
3. Disconnect the six-pin connector at the OBC.
4. Remove the wedge lock from the six-pin connector housing that is connected to the vehicle wire harness.
Remove the brown/white wire from the connector plug.
5. Use a jumper wire with an alligator clip at each end and connect one alligator clip to the negative post
of battery no. 2 and the other alligator clip to the brown/white wire terminal socket that was removed from
the six-pin connector plug.
6. Install the wedge lock in the six-pin connector housing and reconnect the six-pin connector plug. Place
the Tow/Run switch in the RUN position and the battery light should illuminate. If the light does not illu-
minate, replace the battery warning light assembly.
