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

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TB9 - Check Continuity of the TCIL Circuit



- Key Off.

- Breakout box installed.

- PCM disconnected.

- Key On, Engine Off.

- Measure the voltage between Test Pin 79 and Test Pins 24 and 76 at the breakout box.

- Is the voltage reading greater than 2.0 volts?

YES -- REPLACE PCM. CYCLE the TCS to check operation of TCIL.

NO -- CHECK indicator bulb and fuse. If OK, open is in the wiring between the Ignition switch and Test Pin (79) at the harness connector. REPAIR as necessary.