Mitsubishi 3000GT Service Manual page 281

ENGINE AND TRANSAXLE TOTAL CONTROL SIGNAL <AK>
A Transaxle control module connector
OPERATION
Three communication lines are connected between the engine control module and the transaxle control
l
module to send and receive the engine and transaxle total control signal.
If the transistor inside the engine control module changes from OFF to ON by the command of the
l
engine control module, the terminal having a voltage of 5 V applied to it from the transaxle control
module is grounded in the engine control module.
This will change the terminal voltage of the transaxle control module from HIGH to LOW.
If the transistor fitted inside the engine control module changes from ON to OFF, the terminal, having
applied to it a voltage of 5 V from the transaxle control module and grounded in the engine control
module, is released and the terminal voltage of the transaxle control module changes from LOW
to HIGH. In this way, the terminal voltage of the transaxle control module is controlled by ON/OFF
operation of the transistor inside the engine control module in order to send signal.
On the other hand, the transaxle control module also controls the terminal voltage of the engine
control module by the ON/OFF operation of the transistor fitted inside the transaxle control module
in order to send signal. In this way, the engine and transaxle send control signal to each other.
On-Vehicle Inspection of MFI
FUEL INJECTION - Components
Transaxle control module
Engine
control
module
TSB
Revision
A
A
Engine control module connector