Carbon Accumulation Check
- Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
- Turn the ignition switch ON (II).
- Make sure the HDS communicates with the PCM. If it doesn't, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING
)
- Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
- Check the REL TP SENSOR in the DATA LIST with the HDS. The reading should be below 2.46%. If it is not, clean the throttle body (see THROTTLE BODY TEST
).