Mitsubishi 3000GT Service Manual page 997

TROUBLESHOOTING
Before inspecting, check the following items:
Ensure that the suspension has not been modi-
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fied
'Tire and wheel size, specifications, air pressure,
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balance and amount of wear
Steering wheel type
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Malfunction symptom
4WS does not operate
Poor steering feeling
Feeling of friction in steering
Poor steering return
Steering wheel efforts exces-
sive
Rear wheels cannot be Control valve
steered
Poor rear wheels return
Hydraulic pressure for rear
wheel is constantly high
Poor rear wheel steering re-
sponse
Poor rear wheel steering
range
Poorsteerability (extreme tire
wear)
4WS - Troubleshootina
Malfunctioning system
Power cylinder
Rear oil pump
Control valve
Steering gears and linkage
Control valve
Power cylinder
Oil line
Oil reservoir
Power cylinder
Rear oil pump
Power cylinder
TSB Revision
Wheel alignment
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Oil pump drive belt tension
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Power steering fluid level, and air in the system
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Engine idle speed and even idle
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Oil leakage
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Inspection item
Tie rod swing torque
Power cylinder slide resistance
Flow volume check
Rack cracks or deformation
Oil leakage from control valve joint
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 or cylinder friction
Oil leakage from control valve spool
Oil leakage from power cylinder
Extreme oil pump internal wear
Tie rod length improperly adjusted after toe-in
adjustment