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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With Generic Scan Tool

ACCESSING GENERIC OBDII PIDs
These are general instructions for operating a generic scan tool. Refer to the manufacturer's manual for specific instructions.
- Perform the necessary vehicle preparation and visual inspection.
- Connect scan tool to Data Link Connector (DLC).
- Turn ignition key to the ON position or start vehicle (depending on the pinpoint/diagnostic manual instructions for the data requested).
- Verify tool is connected and communicating properly (if necessary, enter the OBD II System Readiness Test to verify communication).
- If accessing a generic OBD II PID, go to the scan tool PID screen to access PIDs (no extended data entry should be required).
- If accessing a Ford PID, refer to the Expanded Diagnostic Protocol table for the string of characters that must be entered to access the PID.
- Enter the PID string to initiate data acquisition:
- View the requested information.
- When finished, turn ignition key to the OFF position.
- Disconnect scan tool from vehicle.