Accord L4-1955cc 2.0L SOHC FI (1987)
3. Disconnect the # 23 vacuum hose from the intake manifold and check the vacuum.
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If there is no vacuum, check the vacuum port.
4. Turn the ignition switch OFF.
5. Connect the PGM-FI test harness "B" connector to the main wire harness only, not the ECU.
6. Disconnect the # 23 vacuum hose from the vacuum hose manifold and connect a vacuum pump to the hose.
7. Apply vacuum to the hose.
It should hold vacuum.
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If it does not hold vacuum, replace the solenoid valve and re-test.
8. Turn the ignition switch ON.
9. Apply vacuum to the hose.
It should hold vacuum.
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If it does not hold vacuum, repair short in Red/Green wire between the solenoid valve and ECU.
NOTE: On cars with automatic transmission, also inspect short in Green wire between the A/T idle control solenoid valve and ECU.
10. Connect B4 terminal to A18 terminal.
