Mitsubishi 1989-1993 GALANT Service Manual page 224

FUEL SYSTEM <SOHC-8 VALVE> -
OPERATION
The power-steering pressure switch functions
l
to convert data as to whether there is or is not a
power steering load to LOW-or HIGH-level vol-
tage, and the resulting signals are input to the
engine control module. The engine control mod-
ule, based upon those signals, regulates the
idle-speed control motor.
INSPECTION
Function
Item No.
Data reading 27
(2) Checking Oil Pressure
Steering wheel
Straight forward
Turned
HARNESS INSPECTION
Harness side connector 6 0
Data display
Inspection conditions
Switch status Engine: Idling
Oil pump delivery pressure (ref. value)
less than 1,470- 1,961 kPa (213-284 psi)
more than 1,470- 1,961 kPa (213-284 psi)
Measure the power supply voltage.
. Connector: Disconnected
. Ignition switch: ON
The battery voltage within the engine control
l
module is applied, by way of the resistance, to
the power-steering pressure switch. When
steering maneuvers are made, the pressure of
the power-steering oil increases, thus switching
ON the power-steering pressure switch, with
the result that the current is grounded. As a re-
sult, the power-steering pressure switch vol-
tage changes from HIGH level to LOW level.
Steering wheel
Steering wheel idle
During steering wheel
operation
Normal indication
OFF
state
ON