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

Signals, (ABS) Control Module [JB]



All values shown above are between the terminal shown in column 1 and terminal #1 (signal ground), unless shown otherwise in brackets.

NOTE It is important to connect test box and check ground points as per JA1-JA2 before starting tests. Connecting Test Box [JA]

f = frequency in Hertz (Hz)
U = DC in volts (V)
UAC = AC in volts (V)
Ubat = battery voltage
Ulow = voltage approaching 0V
t = time in milliseconds (ms)

I Of III:





II Of III:





III Of III: