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Control Solenoid Circuit Check

  1. Shift transmission to Park or Neutral. With engine idling, disconnect engine mount control solenoid harness connector.
  2. Check voltage between chassis ground and engine mount control solenoid harness connector Black/Yellow wire terminal. See Fig 1. Battery voltage should be present. If battery voltage is present, go to next step. If battery voltage is not present, check circuit between solenoid harness connector Black/Yellow terminal and ECM fuse.
  3. Check voltage between engine mount solenoid harness connector Black/Yellow wire and Green/White wire terminals. See Fig 1. Battery voltage should be present. If battery voltage is present, go to next step. If battery voltage is not present, check circuit between solenoid harness connector Green/White wire terminal and ECM. If circuit is okay, substitute with a known-good ECM and retest.
  4. Increase engine to speed to greater than 1000 RPM. Check voltage between solenoid harness connector Black/Yellow wire and Green/White wire terminals. See Fig 1. Battery voltage should not be present. If battery voltage is present, go to next step. If battery voltage is not present, check engine mount vacuum supply. See ENGINE MOUNT VACUUM HOSE CHECK .
  5. Check for short to ground in Green/White wire between ECM and engine mount control solenoid harness connector. See Fig 1. Repair as necessary. If circuit is okay, substitute with a known-good ECM and retest.
Fig 1: Identifying Engine Mount Control Solenoid Valve 2-Pin Connector Terminals
G00276136Courtesy of AMERICAN HONDA MOTOR CO., INC.
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