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

JB2 - Verify Normal Scope Pattern 1

Spark Plug Firing Voltage Pattern:

- Is the average value of spark plug firing voltage 20 KV or less with evenness of spark plug voltage 8 KV or less?

YES -- These are normal values for a properly operating ignition system. Test complete. Go to Pinpoint Test Step HD8 for fuel injector and pressure test. HD8 - Check Resistance of Injector(s) and Harness

NO -- Go to JB3. JB3 - Verify Scope Pattern 2