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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Test DC: Fuel Rail Pressure

Pinpoint Test Schematics and Connectors:






Tables/Graphs:






DC1:





DC2 - DC4:





DC5 - DC8:






This pinpoint test is intended to diagnose:
- Fuel rail pressure circuit
- SIG RTN, FTP PWR, FTP
- Fuel Tank Pressure (FTP) sensor
- Compuvalve