Honda Civic Service Manual page 727

Troubleshootin g Procedures
Chccking the Diagnostic Trouble Code IDTC)
with an OBD ll Scan tool or Honda PGM Tester
when the PCM senses an abnormality in the input or output systems, the pl indicator light in the gauge assembly will
blink. When the 16P Data Link Connector (DLC) (located under the dash on the driver,s side) is connected to the OBD ll
Scan Tool or Honda PGM Tester as shown, the scan tool or tester will indicate the Diagnostic Trouble Code (DTC) when
the ignition switch is turned ON{ll).
lf the El indicator light or the MIL has been reported on, or lf a driveability problem is suspected, follow this procedure:
1. Connect the OBD ll Scan Tool (conforming to SAE J19781 or Honda PGM Tester to rhe 16p DLC. (See the OBD ll Scan
Tool or Honda PGM Tester user's manual for specific instructions. lf you are using the Honda PGM Tester, make sure it
is set to the SAE DTC type.)
2. Turn the ignition switch ON (lll, and observe the DTC on the screen,
3, Record all fuel and emission DTCS, A/T DTCS, and freeze data.
4 lf there is a fuel and emissions DTC, first checkthe fuel and emissions system as indicated bythe DTC (except for DTC
P0700). DTC P0700 means there is one or more A,/T DTC, and no problems were detected in the fuel and emissions cir-
cuit of the PCM.
5. Write down the radio station oresets.
6. Reset the memory with the PGM Tester or by removing the BACK UP fuse in the passenger's under-dash fuse/relay box
for more than 10 seconds.
7. Drive the vehicle for several minutes at speeds over 30 mph (50 km/hr), and then recheck for DTCS. lf the A"/T DTC
returns, go to the Symptom-to Component Chart on pages 14-52 and 14-53 for'96 - 98 models, and pages 14-54 and
14-55 for the'99 - 00 models, lf 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 g.
8. Reset the radio preset stations, and set the clock.
OBD ll SCAN TOOL or
HONDA PGM TESTER
DAYA LINK CONNECTOR {16P}
14-44