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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B3 - Check Open Between SIG RTN, PWR, GND Circuit At PCM

- Key "OFF".

- Breakout box installed, Powertrain Control Module (PCM) connected.

- Measure resistance between test pin 46 and test pins 40 and 60 at the breakout box.

- Is each resistance less than 5.0 ohms?

Yes -- Go to B4. B4 - Check Signal Return Circuit Continuity

No -- Replace PCM. Remove breakout box. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)