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
Torque Control Circuit
The ECM pulls the torque control circuit up to 12 volts and also monitors this circuit. The Transmission Control Module
(TCM) also monitors this same circuit. This circuit provides bi-directional communication between the two controllers. Messages are sent every 25 msec. This data is used in order to reduce the engine torque during transmission shift events in order to improve the shift feel. If the ECM detects a problem on this circuit, the DTC P1740 - Torque Control Circuit will set.