Reading Diagnostic Trouble Codes

NOTE: This is the only information provided by the manufacturer for reading diagnostic trouble codes.

How to Use the PGM Tester or a Scan Tool

If the MIL (Malfunction Indicator Lamp) has come on




1. Start the engine and check the MIL.

NOTE: If the ignition switch is turned ON (II), and the engine is not started, the MIL will stay on for 15 - 20 seconds. Refer to "How To Set Readiness Codes". How to Set Readiness Codes




2. If the MIL stays on, connect the Honda PGM Tester (A) or an OBD II scan tool to the Data Link Connector (DLC) (B) located under the driver's side of the dashboard.
3. Turn the ignition switch ON (II).
4. Check the Diagnostic Trouble Code (DTC) and note it. Also check the freeze frame data. Refer to the DTC Index and begin the appropriate troubleshooting procedure.

NOTE:
- Freeze frame data indicates the engine conditions when the first malfunction, misfire or fuel trim malfunction was detected.
- The scan tool and the Honda PGM Tester can read the DTC, freeze frame data, current data, and other Powertrain Control Module (PCM) data.
- For specific operations, refer to the user's manual that came with the scan tool or Honda PGM tester.

If the MIL did not come on

If the MIL did not come on but there is a driveablility problem, refer to the Symptom Troubleshooting index.

If you can't duplicate the DTC

Some of the troubleshooting requires you to reset the PCM and try to duplicate the DTC. If the problem is intermittent and you can't duplicate the code, do not continue through the procedure. To do so will only result in confusion and, possibly, a needlessly replaced PCM.