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)

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Diagnostic Trouble Codes (DTCS) Self Diagnostic Features

In the process of controlling the various subsystems, the PCM, IPC, ACM, SDM, TCS, RSS, PZM, IPC, RFA, CCP and PHN continually monitor operating conditions for possible system Malfunctions. By comparing system conditions against standard operating limits, certain circuit and component Malfunctions can be detected. A six digit alphanumerical "Diagnostic Trouble Code" (DTC) is stored in computer memory when a malfunction is detected by this self-diagnosis system. These DTCs can later be displayed by the service technician as an aid in system repair.