Actron CP9135 OBD II AutoScanner - Manual (Page 24)

4-3 Troubleshooting
4.3 Link Errors or Erroneous Data
A Link Error occurs if the vehicle’s
computer(s) stops communicating
with the AutoScanner. When this
happens, the AutoScanner prompts
the user to try again. Press the YES
key to try again or the NO key to return to the Main Menu.
If the AutoScanner displays Link Errors when attempting to read or
erase codes, check the following:
• Verify ignition key is ON - not in the
ACCESSORIES position.
• Make sure the AutoScanner’s 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.
• 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 the vehicle for blown fuses . The computer
and DLC usually use separate fuses. If the fuse for the computer
fuse is blown, it cannot transmit data. The fuses may be located
on the fuse block in the passenger compartment.
• Make sure the computer has a good ground. If the computer has
a ground directly to the case, clean the connection and apply a
conductive (dielectric) grease to the mating surfaces.
• With the KOEO, verify the battery voltage is at least 10.5V; 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.
4.4 Technical Support
If the AutoScanner is not working correctly after the checks and
corrections above, contact technical support personnel at
1-800-228-7667 (8:00 - 6:00 EST Monday - Friday), or send an email
to [email protected]. Be prepared to provide the
AutoScanner’s Software ID.
Link Error
Try Again?