Actron 9640 User Manual

Select Read Codes from the GM 

Function List and press 

ENTER. The 

tool will retrieve the DTCs.

One of two screens displays: If the diagnostic checks are working correctly and 

no DTCs have been stored in vehicle’s memory, a SYSTEM PASS message 

displays. If not, the tool displays a screen indicating the number DTCs. 

Use the 

UP/DOWN arrow keys to scroll 

through the codes. Note the codes and 

press 

FUNC to return to the GM 

Function List.

The Erase Codes function deletes the DTCs from the vehicle’s computer 

memory. Perform this function with KOEO or KOER. This function should be 

performed only after the systems have been checked completely and DTCs 

have been documented. 

After servicing the vehicle, erase the stored DTCs, perform a road test, and then 

verify no new codes have been stored. If DTCs return, the problem has not been 

corrected or other faults are present.

✓

Some codes can only be removed by repairing the faults that caused

them. Therefore, these codes will remain in the vehicle’s memory until the

condition is repaired.

✓

Not all trouble codes can be automatically erased using the scan tool.

Some vehicles require a manual erasing procedure. If possible, the tool

performs the appropriate Erase Codes procedure for your vehicle.

Select Erase Codes and press the 

ENTER key. 

GM Function List

?

` 1)Read Codes

2)Erase Codes 

[

3)View Data  

 ~

System Pass:
No Faults Detected.

Codes Found: 1
Use Q To View Codes

Write Down Codes
For Reference    ~

Current Code P0325
Ign System Problem
Elec Spark Control
ESC Failure    

~

GM Function List

?

1)Read Codes

` 2)Erase Codes 

[

3)View Data  

 ~