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 Notes

NOTE: You should enter this pinpoint test only when you have been directed here from diagnostic routines.

This pinpoint test is intended to diagnose only the following:
- Brake ON/OFF (BOO) circuit
- Powertrain Control Module (PCM)

DESCRIPTION
The Brake ON/OFF (BOO) input is wired to the stoplamp circuit and informs the PCM when the brake is applied. The BOO input is used primarily by the torque converter clutch lock/unlock strategy.