Actron 9640 Manuel D’Utilisation

❒

Verify ignition key is ON — not in the 

ACCESSORIES position.

❒

Make sure the Scan Tool cable is securely 

connected to the vehicle’s DLC.

❒

Examine the DLC closely and check for 

cracked or recessed pins, or for any 

substance that could prevent a good 

electrical connection. 

❒

9640 works on some vehicles with J1962 that are not OBDII.

❒

Test for continuity between the DLC wiring and the computer. In an 

extreme case, there may be a broken wire. 

❒

With the KOEO, check for blown fuses. The computer and DLC usually 

use separate fuses. If the fuse for the computer is blown, data cannot be 

transmitted. The fuses may be located on the fuse block in the passenger 

grounded, then clean the connection and apply a conductive (dielectric) 

grease to the mating surfaces.

❒

With the KOEO, verify the battery voltage is at least 8.0V; the minimum 

voltage to power the computer.

❒

As a last resort, the computer may be defective. Refer to the vehicle 

service manual to diagnose the computer. 

The Scan Tool requires six (6) size-AAA alkaline batteries to operate without 

vehicle power. When the batteries need to be replaced, the low-battery icon (

) 

displays.

• Rechargeable batteries do not last as long alkaline types and are not 

recommended. 

• Non-rechargeable Lithium (Li) batteries can be used. Though Lithium types 

last longer than the alkaline types, they are more expensive. 

non-abrasive surface.

2)  Remove the battery cover 

screw.

3)  Slide the battery cover off.
4)  Remove discharged batteries 

and properly discard.

5)  Install new batteries — note 

polarity.

6)  Slide battery cover on.
7) Install screw — do not over-

tighten.