How to Check for DTCs with the Honda Diagnostic System/Scan Tool

WARNING: This page is about a different car, the 2004 Honda Odyssey, 2003 Honda Odyssey, and 2002 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

When the powertrain control module (PCM) senses an abnormality in the input or output systems, the D indicator (A) in the gauge assembly (B) will usually blink.

Fig 1: Identifying Transmission Position Indicator Light Position On Gauge Assembly

Courtesy of AMERICAN HONDA MOTOR CO., INC.

When the data link connector (DLC) (A) (located under the steering column lower cover) is connected to the Scan Tool or Honda diagnostic system (HDS), it will indicate the diagnostic trouble code (DTC) when the ignition switch is turned ON (II).

Fig 2: Locating Data Link Connector (DLC)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

If the D indicator or malfunction indicator lamp (MIL) has been reported on, or if a driveability problem is suspected, follow this procedure:

Connect the Scan Tool (conforming to SAE J1978) or HDS to the DLC. (See the Scan Tool or HDS user's manual for specific instructions.)
Turn the ignition switch ON (II), select A/T system and observe the DTC in the DTCs MENU or the tester screen.
Record all fuel and emissions DTCs, A/T DTCs, and freeze data.
If there is a fuel and emissions DTC, first check the fuel and emissions system as indicated by the DTC (except for DTC P0700; DTC P0700 means there is one or more A/T DTCs, and no problems were detected in the fuel and emissions circuit of the PCM).
Clear the DTC and data.
NOTE: You can also reset the memory by removing the No. 13 fuse in the passenger's under-dash fuse/ relay box for more than 10 seconds. If you do, you need to do the following:
- Get the customer's radio and navigation (if equipped) anti-theft code, and write down the radio and navigation presets.
- Enter the radio and navigation (if equipped) anti-theft code, reset the preset stations, and set the clock.
- Do the idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
Drive the vehicle for several minutes under the same conditions as those indicated by the freeze data, and then recheck for a DTC. If the A/T DTC returns, go to the DTC troubleshooting Index. If the DTC does not return, there was an intermittent problem within the circuit. Make sure all pins and terminals in the circuit are tight.