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IQ DISPLAY MODULE (IQDM) SERIES 2 AND IQDM-P DIAGNOSTICS
IQDM and IQDM-P Handset Troubleshooting
2008-2011 IQ Plus Electric Vehicle Maintenance and Service Supplement
Page 12-19
12
IQDM AND IQDM-P HANDSET TROUBLESHOOTING
In the event that the handset does not function as described in this manual, the following troubleshooting
guide should be studied and the referenced test procedures should be performed to troubleshoot the IQDM
and IQDM-P Series 2 handsets.
TROUBLESHOOTING GUIDE
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
Handset display screen is blank
Handset cord and/or adaptor is
disconnected
See Plugging the Handset into the
Vehicle on page 12-1.
Vehicle batteries – loose terminals or
corrosion
Vehicle batteries – improperly wired
Vehicle batteries – batteries failed
Vehicle batteries – batteries not fully
charged
Handset cord has failed
Test Procedure 1 – Handset Cord on
page 12-20
Handset cord adaptor has failed
Test Procedure 2 – Handset Cord Adaptor
on page 12-20
IQDM jack (on vehicle) has failed
Test Procedure 3 – IQDM Jacks on
page 12-21
Contrast Setting is too light
Onboard computer is in power-down
mode
Drive the vehicle for a short distance and
reconnect the handset to the vehicle.
Onboard computer malfunction
See Section 11 – Electrical System and
Testing.
Loose vehicle wire harness connections
Test Procedure 3 – IQDM Jacks on
page 12-21
Speed controller malfunction
See Section 11 – Electrical System and
Testing.
Handset has failed
Replace handset
Display screen shows jumbled or
undecipherable characters
See Section 11 – Electrical System and
Testing.
Handset malfunction
Disconnect the IQDM cord from the
vehicle. Wait a few seconds and
reconnect the handset to the vehicle
Loose connection at IQDM jack
Test Procedure 3 – IQDM Jacks on
page 12-21
Intermittent handset cord failure
Test Procedure 1 – Handset Cord on
page 12-20
Intermittent handset cord adaptor failure
Test Procedure 2 – Handset Cord Adaptor
on page 12-20
Loose vehicle wire harness connections
Test Procedure 3A – IQDM Jack (Located
Under the Instrument Panel) on
page 12-21
Troubleshooting Guide continued on next page...