Summary of Contents for Honda Accord 1996 62SN725 Service Manual - Page 49

  • Honda Accord 1996 62SN725 Service Manual - Page 49

    Diesel Engine Management System ‘Troubleshooting Flowchart — Vehicle Speed Sensor (VSS) / — The Mallunclion Indicalm Lamp (MIL) indicales Diagnostic Trouble Code (DTC) 24: A problem in the I Vehicle Speed Sensor circuit. The VSS is located on top ol lhe diflerential housing, The VSS is driven by a shall llom the final drive gear and produces an electrical output signal (pulsing squarewave) proportional to the vehicle speed. The VSS signal is sent to the ECM and the speedometer. The ECM uses this signal to provide active surge damping and adjust idle stabilisation and the quantity ol fuel being delivered to the injectors. / / / VEHICLE SPEED ssnson (vss) With the Data Link Connectors diag- nostic L—Line (WHTIPNK wire) con- necled to ground (see page 11.12) or the PGM—Tesler connected to the De- la Link Connector, code 24 is indl- sated, . Do the ECM Reset Procedure (see page 11-13). Road test necessary. Accelerate ve- hicle to 3.500 mm pmi, then decel- erale to 1.500 m (rpm). tnten-nittent lallure. system is OK at this time (test drive may be Does the MIL indicate code N0 necessarvl 247 Check ior poor connections or loose wires between the VSS and ECMt yes BLU r VEL IWH ELK Disconnect the 3P connector lromlhe vss. View tram E terminai side < 1K Turnlheignition swncn on [5 4J1) ‘2‘” (4) (—) Measure voltage between VEL (+) . terminai and body ground. l—J‘ 2v, _ No Repair open in VEL1+) wlre be- < Is there mnw tween under—dash luse/relay be): and vss. VES Measure vollage between YEL (+) terminal and BLK (-) terminal Repair open in BLK H wire be- Is mere battery voltage? tween vss and body ground YES Tum the ignluon switch OFE (To page “>50 11-50