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 A:





CONNECTOR A TERMINALS A1 thru A43
All values specified are measured between the terminal specified in column 1 and terminal A42 (signal ground), unless otherwise indicated in brackets.

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. Unless otherwise specified the data applies to all engine variants.

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 (%)