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

Scan Tool Testing and Procedures

How to End a Troubleshooting Session (required after any troubleshooting)
1. Clear the DTCs from the VTM-4 control unit memory.
2. Turn the ignition switch OFF, and disconnect the HDS from the DLC.
3. Verify that the problem has been repaired; test drive the vehicle for several minutes in 4WD mode.