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

Speedometer

The OSS voltage pulses are sent to the PCM to determine vehicle speed. The PCM sends the vehicle speed information to the BCM over the Class II link. The BCM averages the vehicle speed calculations over time then sends the information to the I/P cluster over the link every 100 ms.

Averaging the information allows the speedometer to obtain smooth speedometer needle fluctuations.