Engine Mount Control System Troubleshooting
NOTE: Check the vacuum hoses and lines for damage and proper connections before troubleshooting.
Follow this procedure if the engine vibrates excessively when idling.
  1. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC).
  1. Turn the ignition switch to ON (II).
  1. Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain control module (PCM). If it doesn't communicate, troubleshoot the DLC circuit.
  1. Check the idle speed.
  1. Raise the engine speed from idling to 2,000 rpm (min −1 ).
  1. Check the MOUNT CTRL SOL in the PGM-FI DATA LIST with the HDS.
Is ON indicated at idling and OFF indicated at 2,000 rpm (min −1 )?
YES -
Go to Step 7 .
NO -
Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the engine mount control system works properly, and the ECM/PCM was updated, the troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM. ■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the engine mount control solenoid valve 2P connector from the engine mount control solenoid valve.
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between engine mount control solenoid valve 2P connector terminal No. 2 and body ground.
Is there battery voltage?
YES -
Go to Step 11 .
NO -
Repair open in the wire between engine mount control solenoid valve 2P connector terminal No. 2 and No. 7 (15 A) fuse in the driver's under-dash fuse/relay box.■
  1. Start the engine, and let it idle.