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2.4 Verification

Please follow these steps to verify the installation:

1.

  Before securing the OBDII converter under the dash, ensure 

the LEDs are visible to support a quick operational test. 

2.

  With everything connected properly, turn the ignition to the 

ON position, and start the engine.

3.

  Watch the LEDs on the OBDII converter. You should see the 

  OBDII converter in “detecting vehicle” mode and then 

transition to “normal operation” mode. LED definitions are 
shown in section 2.5 for reference.

4.

  Once the OBDII converter enters normal operating mode,  

it should begin to transmit data via the J1708 link to the  
TND

 760 (this may take several seconds).

5.

  You will need to login to the TND

 760. From the 760 main 

menu, click on 

SYSINFO, DIAGNOSTICS

, and then 

JBUS

 to 

verify the 760 is receiving JBus data. It is normal to see a 
message that says “

MISSING PARAMETERS

” since not all  

vehicles support all the necessary parameters. Also, the  
OBDII converter computes some messages, and those  
messages may take additional time to initialize before they 
can be sent.

 

2.3 OBDII Converter Installation Process

1.

  Unmount the vehicle OBDII connector.

2.

  Mount the OBDII connector on the OBDII Y cable where the 

vehicle OBDII connecter was located.

3.

  Plug the OBDII Y cable to the OBDII converter, and secure it 

by tightening the two screws on the cable.

4.

  Connect the OBDII plug on the OBDII Y cable to the vehicle 

OBDII port.

5.

  Connect the TND

 760 flying lead cable to the OBDII  

converter, and secure it by tightening the two screws on  
the cable.

6.

  Connect the TND

 760 cable to the TND

 760.

7.

  At this point the installer should perform the verification 

test identified in section 2.4. 

NOTE: If there are any issues 

with the connections, it will be easiest to trouble shoot 
before securing the OBDII converter and the cables.

8.

  Mount the OBDII converter in a secure location.

9.

  Secure all loose cables, with the zip ties or double-sided tape 

provided in your converter kit.

Mode

Red
LED

(Power)

Green

LED

(Activity)

Red
LED

(Debug)

Actual State

Customer Description

1

On

On

Off

Normal operation

Normal operation

2

On

SB

Off

Detecting vehicle

Detecting vehicle

3

Off

FB

Off

Database version mismatch

Database needs to be updated

4

Off

SB

Off

Update in progress

Update in progress

5

Off

VSB

VSB

Device asleep

Device asleep

6

Off

Off

Off

Device unpowered

Device unpowered

7

Off

On

FB

Error FPGA Image Invalid

Firmware needs to be updated

8

Off

Off

FB

Error with EMM code

Update System Manager

9

Off

Off

FB

EMM checking CRC of Images

Wait 10 seconds. If state does not 
change, see Mode 8.

10

Off

SB

FB

Error writing/reading to/from flash 
during update

Restart update of current component

LED state descriptions

On

 (LED_ON): lit, solid

Off

 (LED_OFF): unlit

FB

 (LED_FAST): Alternating on-off; 125ms on, 125 ms off

SB

 (LED_SLOW): Alternating on-off; 0.5s on, 0.5s off

VSB

 (LED_VERY_SLOW): Alternating on-off; 0.25s on, 2s off

2.5 LED Operation

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