- Connect a scan tool/Honda PGM Tester (see page 11-3)
- Turn the ignition switch ON (II) and read the scan tool/Honda PGM Tester.
Does the scan tool/Honda PGM Tester communicate with the ECM?
YES - Go to step 3.
NO - Go to the troubleshooting ''DLC Circuit Troubleshooting'' (see page 11-88)
- Check the scan tool/Honda PGM Tester for DTCs.
Are any DTCs indicated?
YES - Go to the DTC Troubleshooting Index.
NO - Go to step 4.
- Turn the ignition switch OFF.
- Turn the ignition switch ON (II) and watch the Malfunction Indicator Lamp (MIL).
Does the MIL come on and stay on?
YES - If the MIL always comes on and stays on, go to step 75. But if the MIL sometimes works normally, first check for the following problems.
- An intermittent short in the wire between the ECM (E29) and the Service check Connector.
- An intermittent short in the wire between the ECM (E31) and the gauge assembly.
NO - If the MIL is always off, go to step 6. But if the MIL sometimes works normally, first check for the following problems.
- A loose No. 10 METER (7.5A) fuse in the under-dash fuse/relay box.
- A loose No. 20 IG (50A) fuse in the under-hood fuse/relay box.
- A loose No. 6 ECU (ECM) (15A) fuse in the under-hood fuse/relay box.
- A loose No. 17 FUEL PUMP (15A) fuse in the under-dash fuse/relay box.
- A poor connection at ECM terminal E31.
- An intermittent open in the GRN/ORN wire between the ECM (E31) and the gauge assembly.
- An intermittent short in the wire between the ECM (A21) and the manifold absolute pressure (MAP) sensor.
- An intermittent short in the wire between the ECM (A20) and the throttle position (TP) sensor.
- Turn the ignition switch OFF.
- Press the inertia switch button.
- Turn the ignition switch ON (II).
Does the MIL come on for 2 seconds after the ignition switch is turned ON (II)?
YES - Intermittent failure system is OK at this time. 
NO - Go to step 9.