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

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Signal Description Overview

Connector B:





CONNECTOR B TERMINALS B1 thru B43
All values specified are measured between the terminal specified in column 1 and terminal B28 (signal ground), unless indicated in brackets in column 2.

NOTE: It is important to connect breakout box and check ground terminals before readings are taken.

The values specified in the table apply with the engine unloaded and at normal operating temperature.

U = DC in volts (V)
Ubat = battery voltage
Ulow = voltage approx. 0 V or O V
t = time in milliseconds (ms)
UAC = AC in volts (V)
f = frequency in Hertz (Hz)
%duty = duty cycle (pulse ratio) as a percentage (%)