Civic 1500 (Manual Steering Models)
- Disconnect air suction hose at control box No. 2. Force air into hose using a hand vacuum pump, "T" fitting and pressure gauge. See Figure .
- Air should not flow and pressure gauge should indicate build-up. If air does not pass through, proceed to steps 4) and 5). If air passes through, proceed to step 3).
- Remove control box cover. Pinch off air suction hose to frequency solenoid valve A. Force air into air suction hose. If air flows through, replace air control valve B and retest. If air does not flow through, replace frequency solenoid A and retest.
- Disconnect vacuum hose No. 24 from surge tank B and connect vacuum pump to hose. Disconnect hose between air control valve B and frequency solenoid valve A. Connect vacuum pump (on pressure side) to hose.
- Pinch off hose routed from feedback control solenoid valve. Apply vacuum to air control valve B (diaphragm side) and force air into control valve B (valve side). If air passes through, valve is okay. If air does not pass through, replace air control valve B and retest.