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

TF4 - Check OSS Circuit For Short to Power

- Key Off.

- OSS disconnected.

- Breakout box installed. PCM disconnected.

- Measure resistance between Test Pin 84 and Test Pin 71 (VPWR) at the breakout box.

- Is the resistance less than 5.0?

YES -- SERVICE short circuit. REMOVE breakout box. RECONNECT all components. REPEAT Transmission Drive Cycle. REFER to TF1. TF1 - Continuous DTC 0720: Perform Transmission Drive Cycle

NO -- GO to TF5. TF5 - Check OSS Resistance