Power Steering Idle-Up System Test
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1990 Mitsubishi Van, 1990 Mitsubishi Sigma, 1990 Mitsubishi Pickup, 1990 Mitsubishi Montero, and 1990 Mitsubishi Mirage. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect pressure hose from power steering pump. Connect in-line a pressure gauge and hoses capable of handling 300 psi (21 kg/cm2 ). Also, connect a shut-off valve in-line with the pressure gauge. See Fig 1 .
- Bleed air from system by disabling ignition system and cranking engine while turning steering wheel all the way from left to right 6 times. Start engine and turn steering wheel back and forth to raise fluid temperature to approximately 122-140°F (50-60°C).
- With engine idling, gradually close shutoff valve of pressure gauge to increase hydraulic pressure. If idle speed did not increase 200-250 RPM when fluid pressure reached 213-284 psi (15-20 kg/cm2 ), replace power steering idle-up switch.
- Gradually open shutoff valve. If engine speed does not return to curb idle speed between 100-284 psi (7-20 kg/cm2 ), replace power steering idle-up switch. Remove testing equipment. Bleed air from system as in step 2).