Cruise Control Communication Circuit Troubleshooting

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Honda Odyssey, 2003 Honda Odyssey, 2002 Honda Odyssey, 2001 Honda Odyssey, and 2000 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

Start the engine.
Turn on the cruise control main switch, then drive the vehicle to speeds over 25 mph (40 km/h) with the cruise control.
Does the cruise control operate?
1. YES: Go to step 3.
2. NO: Check the cruise control unit or cruise control actuator.
Turn the ignition switch OFF.
Disconnect cruise control unit 14P connector and powertrain control module (PCM) connector A (32P) (1999-2000, 2002-2004 models) or PCM connector E (31P) (2001 model).
Check for continuity between the No. 8 terminal of the cruise control unit 14P connector and body ground.

Fig 1: Checking For Continuity Between The No. 8 Terminal Of The Cruise Control Unit 14P Connector & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES: Repair a short in the wire between the PCM connector terminal A5 (1999-2000, 2002-2004 models) or E17 (2001 model) and cruise control unit 14P connector terminal No. 8.
2. NO: Go to step 6.
Reconnect the cruise control unit 14P connector and PCM connector A (32P) (1999-2000, 2002-2004 models) or PCM connector E (31P) (2001 model).
Turn the ignition switch ON (II).
Connect a voltmeter between the No. 8 terminal of the cruise control unit 14P connector and body ground. Drive the vehicle at speeds over 25 mph (40 km/h) with the cruise control set, and watch the voltmeter.

Fig 2: Connecting A Voltmeter Between The No. 8 Terminal Of The Cruise Control Unit 14P Connector & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 1 V?
1. YES: Go to step 9.
2. NO: Replace the cruise control unit.
Connect a voltmeter between PCM connector terminal A5 (1999-2000, 2002-2004 models) or E17 (2001 model) and body ground. Drive the vehicle at speeds over 25 mph (40 km/h) with the cruise control set, and watch the voltmeter.

Fig 3: Connecting A Voltmeter Between PCM Connector Terminal A5 & Body Ground (1999-2000 Models)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: Connecting A Voltmeter Between PCM Connector Terminal E17 & Body Ground (2001 Model)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 5: Connecting A Voltmeter Between PCM Connector Terminal A5 & Body Ground (2002-2004 Models)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 1 V?
1. YES: Check for loose connection of the BLU/GRN wire between the cruise control unit and the PCM. If necessary replace the PCM and recheck (see HOW TO RESET THE PCM ).
2. NO: Repair an open in the wire between the PCM connector terminal A5 (1999-2000, 2002-2004 models) or E17 (2001 model) and the cruise control unit 14P connector terminal No. 8.