Mitsubishi Stealth 1994 Import Service Manual page 721

CHECK CHART
1 Inspection of control unit power supply circuit
J/B
IOD OR
STORAGE
CONNECTOR
CRUISE
CONTROL
UNIT
TROUBLESHOOTING HINTS
ECU terminal voltage
Terminal
No.
2 Control unit power supply
8, 14
Control unit ground
16
Control unit back up power supply
CRUISE CONTROL SYSTEM
SWITCH
Signal name
DESCRIPTION OF OPERATION
The power is supplied through the ignition switch
When the cruise control main switch is set to
1.
ON with the ignition switch at ON, the current
from switch S, flows through relay Ry, in the
switch. Accordingly, the contact of relay Ry, is
closed and the power is supplied to the control
unit.
2. When the main switch is released, it automati-
cally returns to the neutral position. Since the
current from switch S2 flows to relay Ry,, the
contact of relay Ry, remains closed.
3. When the main switch is set to OFF, current to
relay Ry, is interrupted. This opens the contact
of relay Ry, to stop the power supply to the
control unit. When the switch is released, it
automatically returns to the neutral position, but
relay Ry, stays in the OFF state.
4. When the ignition switch is set to OFF while
relay Ry, in the main switch is ON, relay Ry, is
forced to the OFF state just like when the main
switch is set to OFF. Even if the ignition switch
is set to ON again, relay Ry, stays in the OFF
state until the main switch is set to ON.
NOTE
The numbers beside each connector correspond
to those in the section (P.l4G-19) "HARNESS
AND COMPONENTS LAYOUT".
Condition
Main switch
ON and neutral position
thereafter
Main switch OFF and neutral position
thereafter
At all times
At all times
Terminal
voltage
Battery
positive voltage
ov
o v
Battery
positive voltage