Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Scan Tool Testing and Procedures

READ DATA LIST

HINT: Using the intelligent tester to read the DATA LIST allows the values or states of switches, sensors, actuators, and other items to be read without removing any parts. This nonintrusive inspection can be very useful as intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the DATA LIST information early in troubleshooting is one way to save diagnostic time.




a. Connect the intelligent tester to the DLC3.
b. Turn the engine switch on (IG).




c. Read the DATA LIST.