Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHONDA1985ACCORD SEI, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMTBI SYSTEMTESTINGIDLE CONTROL SOLENOID VALVE
1985 Honda Accord SEi, Standard
Idle Control Solenoid Valve
1985 Honda Accord SEi, StandardSECTION Idle Control Solenoid Valve
- Idle control solenoid valve is activated by commands from ECU. When solenoid valve opens, vacuum enters hose between air flow tube and solenoid valve. Idle speed increases for a short period after starting engine and whenever electrical loads are turned on.NOTE: Vacuum will disappear when engine RPM is raised over 1700 RPM.
- While solenoid valve is being activated, 9 volts or more should be available between Black terminal (A) and Light Green (B) of valve leads.
- On Accord SEi models, disconnect wire harness from idle control solenoid valve. Disconnect vacuum hose No. 26 from air flow tube. Apply vacuum to hose. It should hold vacuum.
- Connect the positive battery terminal to the Black/Yellow terminal of control box and negative battery terminal to Green/Black terminal. Disconnect vacuum hose No. 28 from intake manifold. Apply vacuum to vacuum hose No. 26. It SHOULD NOT hold vacuum.
- Connect vacuum gauge to hose and apply vacuum. It should hold vacuum.
- Connect battery positive terminal to control box connector Black terminal and negative terminal to Light Green terminal. Apply vacuum to hose. It SHOULD NOT hold vacuum.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.