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
Ignition Mode
The scan tool displays Bypass/IC. The bypass indicates the Ignition Control
(IC) module is keeping the spark advance at a fixed
10 degrees BTDC, bypass mode. The
ignition control module determines the correct operating mode based on the level of the voltage that the
PCM sends to the ignition control module on the bypass circuit. If the PCM does not turn ON the
5 volts, or if the ignition control module does not receive the voltage, the module will control spark timing. The ignition control (IC) indicates that the PCM has signaled the ignition module that the PCM is going to control the spark advance, IC mode. The ignition control module determines the correct operating mode based on the level of voltage that the PCM sends to the ignition control module on the bypass circuit. The PCM provides
5 volts to the ignition control module bypass circuit if the PCM is going to control spark timing, IC mode. If the PCM does not turn ON the
5 volts, or if the ignition control module does not receive the voltage, the module will control spark timing, bypass mode.