Cruise Control Communication Circuit
- Start the engine.
- Turn on the cruise control main switch, then drive the vehicle to speeds over 25 MPH with the cruise control engaged. Does the cruise control operate? If so, go to next step. If not, check the cruise control unit or cruise control actuator.
- Turn the ignition switch OFF.
- Disconnect cruise control unit 14-pin connector and PCM connector A (32-pin). See Fig 1 and Fig 2
.
- Check for continuity between the No. 8 terminal of the cruise control unit 14-pin connector and ground. See Fig 1. Is there continuity? If so, repair short to ground in the wire between PCM connector terminal A5 and the cruise control unit 14-pin connector terminal No. 8. If not, go to next step.
- Reconnect the cruise control unit 14-pin connector and PCM connector A (32-pin).
- Connect a voltmeter between the No. 8 terminal of the cruise control unit 14-pin connector and body ground. Test-drive the vehicle at speeds over 25 MPH with the cruise control set, and watch the voltmeter. Is there about 1 volt? If so, go to next step. If not substitute a known-good cruise control unit. If the system works properly, replace the cruise control unit.
- Connect a voltmeter between PCM connector terminal A5 and body ground. See Fig 2. Drive the vehicle at speeds over 25 MPH with the cruise control set, and watch the voltmeter. Is there about 1 volt? If so, check for loose connectors of the BLU/GRN wire between the cruise control unit and PCM. If necessary replace the PCM and recheck. If not, repair open in the wire between the PCM connector terminal A5 and the cruise control unit 14-pin connector terminal No. 8.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Courtesy of AMERICAN HONDA MOTOR CO., INC.