Actron 9640A Battery Replacement, Check the following if an error message displays, Polarity

Help & Troubleshooting

Check the following if an error message displays:

❒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 sub- stance that could prevent a good electrical connection.

❒Verify that the vehicle you are testing is an OBD II-compliant vehicle. Just because it has the OBD II J1962 DLC does not mean the vehicle is OBD II compliant. Inspect the vehicle’s VECI decal for a statement of OBD II compliance.

❒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 compartment.

❒Make sure the computer has a good ground. If the computer case is 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 ser- vice manual to diagnose the computer.

BATTERY REPLACEMENT

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 rec- ommended.

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

last longer than the alkaline types, they are more expensive.					8
Follow these steps to replace the batteries:
1)	Place the Scan Tool with the	SCREW
	display facing down on a
	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.		COVER
6)	Slide battery cover on.
7)	Install screw — do not over-
	tighten.

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