Mitsubishi 3000GT Service Manual page 476

ENGINE AND EMISSION CONTROL
4
Inspection of vehicle speed sensor circuit
IGNITION
DESCRIPTION OF OPERATION
1994 models>
The vehicle speed sensor, mounted in the transmis-
sion, delivers pulse signals proportional to the rota-
tional speed of the transmission output gear (vehicle
speed) to the control unit. (Four pulse signals gener-
ated per rotation of the output gear) Since the ve-
hicle speed sensor is of the electronic type, the
power is supplied through the ignition switch (IG,).
TROUBLESHOOTING HINTS
Diagnosis No. 12 (Automatically canceled)
ECU terminal voltage
Terminal
No.
19 Vehicle speed sensor
CRUISE
Signal name
TSB Revision
The vehicle speed sensor is a reed switch type
and is mounted in the speedometer. It sends pulse
signals proportional to the rotational speed of the
transmission output gear (vehicle speed) to the
control unit. (Four pulse signals generated per rota-
tion of the output gear)
Condition
Slowly drive forward with SELECT lever at
Terminal
voltage
0 to 0.6 V ++
2 V or more
(Flashing)