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

Test L: No Power To The Scan Tool

PINPOINT TEST L: NO POWER TO THE SCAN TOOL

Normal Operation
The scan tool is connected to the data link connector (DLC) to communicate with the high speed controller area network (HS-CAN), medium speed controller area network (MS-CAN), and International Standards Organization (ISO) 9141 communications network. Voltage for the scan tool is provided by circuit 1047 (LG/RD). Ground is provided by circuits 570 (BK/WH) and 1205 (BK).

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Scan tool


L1:






L1-L3: