Mitsubishi 3000GT 1991 Service Manual page 274

CRUISE CONTROL SYSTEM
Inspection of stop light switch circuit
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Inspection of clutch switch circuit <M/T>
7
CRUISE
FUSIBLE LINK@
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15
STOP
LIGHT
TSB Revision
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 cancella-
tion of vehicle speed control. (Refer to P. 13-I 67.) At
the same time, the stop light (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
DESCRIPTION OF OPERATION
When the clutch pedal is depressed during vehicle
speed control, the contact of the clutch switch is
closed. As a result, a cancel signal is input to the
control unit which 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 switch
Condition Terminal
voltage
System
When brake pedal
is depressed voltage
O V
When brake pedal
is not depressed
Terminal
Condition
voltage
O V
When clutch pedal
is depressed
W h e n c l u t c h p e d a l S y s t e m ,
voltage
is not depressed
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