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

TB7 - Check For Short to Ground In the TCIL Circuit



- Key Off.

- Disconnect PCM. Inspect both ends for damaged or pushed out pins, moisture, corrosion, loose wires, etc. Service as necessary.

- Key On, Engine Off.

- Does the TCIL remain on?

YES -- REPAIR short to ground between bulb and Test Pin (79). VERIFY TCIL turns On and Off.

NO -- TCIL turns off when PCM is disconnected. REPLACE PCM.