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

IGT Control Signal

Inspection Using An Oscilloscope (Reference)




IGT signal
- PCM terminal
- IGT1 26 (+) - 103 (-)
- IGT2 1 (+) - 103 (-)
- IGT3 52 (+) - 103 (-)
- IGT4 27 (+) - 103 (-)
- IGT5 78 (+) - 103 (-)
- IGT6 82 (+) - 103 (-)

- Oscilloscope setting: 2 V/DIV (Y), 10 ms/DIV (X), DC range
- Vehicle condition: idle after warm up