Reading Diagnostic Trouble Codes

How to Check for DTCs with the Honda PGM Tester/Scan Tool





When the transmission control module (TCM) senses an abnormality in the input or output systems, the [D] indicator light (A) in the gauge assembly will usually blink and/or the Malfunction Indicator Lamp (MIL) may come on.





When the data link connector (DLC) (B) (located under the dash behind the center console) is connected to the OBD II Scan Tool or Honda PGM Tester (A), it will indicate the diagnostic trouble code (DTC) when the ignition switch is turned ON (II).
If the [D] indicator light or MIL has been reported on, or if a driveability problem is suspected, follow this procedure:
1. Connect the OBD II Scan Tool (conforming to SAE J1978) or Honda PGM Tester to the DLC. (See the OBD II Scan Tool or Honda PGM Tester user's manual for specific instructions. If you are using the Honda PGM Tester, make sure it is set to the SAE DTC type.)
2. Turn the ignition switch ON (II), and observe the DTC on the screen.
3. Record all fuel and emissions DTCs, A/T DTCs, and freeze data.
4. 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 ECM).
5. Get the customer's radio anti-theft code, and write down the radio station presets.
6. Reset the memory with the Honda PGM Tester, OBD II Scan Tool or by removing the No. 18 (7.5 A) fuse in the under-dash fuse/relay box for more than 10 seconds.
7. Drive the vehicle for several minutes under the same conditions as those indicated by the freeze data, and then recheck for 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, and then go to step 8.
8. Enter the radio code, reset the preset stations, and set the clock.