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
Check Mode
The
PCM has the ability to operate in the Normal mode or in the Check mode. The 2 modes of operation are identical except that when the PCM is operating in the Check mode, the PCM has an increased ability to detect malfunctions. In order to request that the PCM operate in the Check mode, scan tool communication with the PCM is necessary. For information on the use of the Check mode in diagnosing driveability concerns, refer to
Powertrain Control Module Diagnosis.