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IQ DISPLAY MODULE (IQDM) SERIES 2 AND IQDM-P DIAGNOSTICS
IQDM and IQDM-P Handset Troubleshooting
Page 12-16
2008-2011 IQ System Electric Vehicle Maintenance and Service Supplement
12
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 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 12-17
Handset cord adaptor has failed
Test Procedure 2 – Handset Cord Adaptor
on page 12-18
IQDM jack (on vehicle F&R switch) has
failed
Test Procedure 3 – IQDM Jacks on
page 12-18
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 12-18
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 12-18
Intermittent handset cord failure
Test Procedure 1 – Handset Cord on
page 12-17
Intermittent handset cord adaptor failure
Test Procedure 2 – Handset Cord Adaptor
on page 12-18
Loose vehicle wire harness connections
Test Procedure 3 – IQDM Jacks on
page 12-18
Troubleshooting Guide continued on next page...