Instrument Does Not Power On When Connected via OBD Cable

Possible Power Issues in the Vehicle

Several causes may explain a power issue with the instrument in the vehicle

Possible Causes

? Faulty OBD port fuse
The fuse associated with the vehicle’s OBD port may be blown.

? Connector corrosion
Corrosion may be present:

• at the OBD connector
• or at the USB connector

⚠️ Damaged cable
The power cable may be cut, worn, or damaged.

? Defective instrument connector
The instrument connector may be damaged or corroded.

⚙️ Incorrect instrument configuration
An incorrect configuration may give the impression that the instrument is not powering on.

? Use of a vehicle USB port
If the instrument has been connected to a vehicle USB port, it may:

• no longer function properly
• or appear not to power on

Using a Vehicle USB Port

⚠️ Important

The TL1000 will not work when connected to a vehicle multimedia USB port.

Why?

Vehicle USB ports:

• are typically turned off with the ignition (non-constant power)

• are connected to the vehicle’s radio system

The radio attempts to communicate with the instrument, which:

• prevents data recording

• makes the instrument behave as if it were connected to a computer

➡️ Refer to the guide:
 Instrument does not turn on when connected to a car USB port

OBD Power Cable Verification

If you are using the provided OBD power cable, proceed by elimination to identify the source of the issue:

• Instrument settings

• OBD cable (properly connected and condition of both connectors)

• Instrument (condition of the connector)

• Vehicle OBD connector itself and its fuse

Step 1 — Verify settings

• Check the instrument’s internal configuration
  ➡️ Guide: How to check instrument parameters 

If everything is correct, proceed to the next step.

 

Step 2 — Test with standard USB power

1. Connect the instrument to a standard USB charger (e.g., phone charger) using the USB cable.

2. Place the instrument near a window to allow GPS signal reception.

Results:

• ❌ Instrument does not power on:
  ➝ Refer to the Problem solving guide (trouble shooting)
   

• ✅ Instrument powers on:
  ➝ The issue is likely related to:

  • the OBD cable

  • or the vehicle’s OBD power supply
    ➝ Proceed to Step 3

Step 3 — Verify the vehicle OBD port

1. Check the fuse associated with the vehicle’s OBD port.

2. Using a measuring device, confirm the presence of 12 VDC at the OBD connector.

3. Test the OBD power cable in another vehicle.

Results:

• If the cable does not work in another vehicle:
  ➝ The cable is likely defective

➡️ Replace the cable: Get a replacement cable here