Mitsubishi 3000GT 1991, Service Manual

Page: 863 / 1146

STEERING SYSTEM (4WS) Troubleshooting
TROUBLESHOOTING
Before inspecting, check the following items:
l
Oil pump drive belt tension
l
Ensure that the suspension has not been mod- @ Power steering fluid level, and air in the system
ified
l
Engine and even idle
l
Tire and wheel size, specifications, air pressure,
l
Oil leakage
balance and amount of wear
l
Steering wheel type
l
Wheel alignment
Malfunction symptom
4WS does not operate
Malfunctioning system
Power cylinder
Inspection item
Tie rod swing torque
Power cylinder slide resistance
Rear oil pump
Flow volume check
Control valve
Poor steering feeling Steering gears and linkage Rack cracks or deformation
Feeling of friction in steering
Poor steering return
Steering wheel efforts
excessive
Control valve
Oil leakage from control valve
Rear wheels cannot be
steered
Poor rear wheels return
Hydraulic pressure for rear
wheel is constantly high
Long rear wheel steering
delay
Poor steering response
Poor steering return
Power cylinder
Oil line
Oil reservoir
Control valve
Power cylinder
Rear oil pump
Power cylinder
Oil leakage from piston rod
Pressure hose breakage
Oil reservoir deformation or oil leakage
Stuck control valve spool
Stuck power cylinder
Relief valve remains open
Excessive power cylinder friction
Looseness in power cylinder tie rod ball
Ball joint dust cover cracks
Poor rear wheel steering
response
Poor rear wheel steering
range
Poor steerability (extreme
tire wear)
Control valve
Power cylinder
Rear oil pump
Power cylinder
Oil leakage from control valve spool
Oil leakage from power cylinder
Extreme oil pump internal wear
rod length improperly adjusted after toe-in
adjustment
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