Mitsubishi 3000GT Service Manual page 479

ENGINE AND EMISSION CONTROL
FUSIBLE LINK@
I
6
Inspection of stop light switch circuit
DESCRIPTION OF OPERATION
When the brake pedal is depressed during vehicle speed
control, the cruise control (NC) contact of the stop light switch
is opened to interrupt the power supply to the vacuum pump
assembly for cancellation of vehicle speed control. (Refer
to P.17-17.) At the same time, the stoplight (NO) contact
is closed. As a result, a cancel signal is input to the control
unit which internally interrupts the vacuum pump assembly
drive circuit.
TROUBLESHOOTING HINTS
ECU terminal voltage
Terminal Signal name
No.
15
Stop light
switch
Inspection of clutch pedal position switch circuit
7
DESCRIPTION OF OPERATION
When the clutch pedal is depressed during vehicle speed
control, the contact of the clutch pedal position switch is closed.
As result, a cancel signal is input to the control unit which
a
internally interrupts the power supply to the vacuum pump
assembly drive circuit for cancellation of vehicle speed control.
TROUBLESHOOTING HINTS
ECU terminal voltage
Terminal Signal name /
No.
1
Clutch pedal When clutch pedal 0 V
position
switch
Condition Terminal
voltage
Battery
When brake pedal is
depressed positive
voltage
0 V
When brake pedal is
not depressed
Terminal
Condition
voltage
is depressed
When clutch pedal Battery
is not depressed positive
voltage