Mitsubishi 3000GT Service Manual page 225

POWER STEERING PRESSURE SWITCH
ON
(100-284)
OPERATION
The power steering pressure switch converts presence/absence of power steering load into low/high
l
voltage and inputs it to the engine control module, which then controls the idle air control motor
based on this signal.
The battery voltage in the engine control module is applied through a resistor to the power steering
l
pressure switch. Steering operation causes the power steering oil pressure to increase, turning the
switch on. As a result, continuity is produced between the battery voltage applied and ground. This
causes the power steering pressure terminal voltage to go from high to low.
MULTIPORT
On-Vehicle Inspection of MFI
FUEL INJECTION - ComDonents
Engine control
module
Pressure [kPa (psi)]
TSB Revision
A Harness side
Power steering
r
pressure switch
connector