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Qualcomm OBDII J1708 Troubleshooting Guide Page 12

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LED Troubleshooting Table for 65-J9322-1 System Verification and Troubleshooting
2-4 80-J9325-1 Rev. C
MAY CONTAIN U.S. AND INTERNATIONAL EXPORT CONTROLLED INFORMATION
LED Troubleshooting Table for 65-J9322-1
LED
Ignition
State State Possible Causes Solution
Green OFF Ignition OFF Correct n/a n/a
Green OFF Key ON/
Ignition OFF
Correct n/a Green LED should flash in this condition during
vehicle detection, then go OFF.
Green flashing Any vehicle
state
Correct n/a Green LED should flash in this condition during
vehicle detection
It will turn OFF if engine is not running.
It will turn ON if engine is running.
Green ON Engine
running
Correct n/a n/a
Red OFF Ignition OFF Correct n/a Note: May not see short blip
Red OFF Key ON/
Ignition OFF
Incorrect No power from the ignition wire
to the LDVDS.
OBDII Converter power fault.
Check power wiring from the vehicle to the
OBDII Converter.
Check fuses on the vehicle.
Swap OBDII Converter with a known good
device; replace device if appropriate.
Red OFF Engine
running
Incorrect No power from the vehicle to
the LDVDS.
OBDII Converter power Fault.
Check power wiring from the vehicle to the
LDVDS.
Check fuses on the vehicle.
Swap OBDII Converter with a known good
device; replace device if appropriate.
Red flashing
2 seconds
OFF/ 0.02
seconds ON
(short blip)
Ignition OFF Correct once
engine has
been ON once
after install
(sleep)
Red flashing
2 seconds
OFF/ 0.02
seconds ON
(short blip)
Key ON/
Engine OFF
Incorrect OBDII Converter host
processor fault.
Swap OBDII Converter with a known good
device; replace device if appropriate.
Red flashing
2 seconds
OFF/ 0.02
seconds ON
(short blip)
Engine
Running
Incorrect OBDII Converter host
processor fault.
Swap OBDII Converter with a known good
device; replace device if appropriate.
Red flashing
2 seconds
OFF/ 0.5
seconds ON
Key ON/
Engine OFF
Correct The OBDII Converter is polling for RPM>0.
Red flashing 2
seconds OFF/
0.5 seconds
ON
Ignition OFF Incorrect Power wired to VBat instead of
switched ignition.
OBDII Converter fault
Check that there is no 12V on the ignition wire
going to the OBDII Converter.
Swap OBDII Converter with a known good
device; replace device if appropriate.
Red flashing
2 seconds
OFF/ 0.5
seconds ON
Engine
running
Incorrect No power on the vehicle OBDII
connector.
OBDII Converter fault.
Check power on the vehicle OBDII connector.
Check fuses on the vehicle.
Swap OBDII Converter with a known good
device; replace device if appropriate.
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