Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2001 Honda Prelude Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Cruise Control Communication Circuit Test (A/T): Odyssey
- Start engine and test drive vehicle. Turn cruise control main switch on and test cruise control system operation. See appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT. If cruise control system operates properly, go to next step. If cruise control system does not operate properly, check cruise control unit or cruise control actuator. See appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
- Turn ignition off. Disconnect PCM connector "E" (31-pin connector) and 14-pin cruise control unit connector. Check for continuity on Blue/Green wire between body ground and 14-pin cruise control unit connector terminal No. 8. See Figure. If continuity is not present, go to next step. If continuity is present, repair short to ground in Blue/Green wire between cruise control unit and PCM connectors. See WIRING DIAGRAMS article.
- Turn ignition off. Reconnect PCM connector "E" (31-pin connector) and 14-pin cruise control unit connector. Turn ignition on. Backprobing, measure voltage of Blue/Green wire between body ground and 14-pin cruise control unit connector terminal No. 8 while test driving vehicle with cruise control system in operation. See Figure. If voltage reading is about one volt, go to next step. If voltage reading is not about one volt, replace cruise control unit. See appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.
- Backprobing, measure voltage of Blue/Green wire between body ground and PCM connector "E" (31-pin connector) terminal No. 17, while test driving vehicle with cruise control system in operation. See Figure. If voltage reading is about one volt, check for loose connectors at PCM. If connectors are okay, substitute known-good PCM and retest. See SUBSTITUTING POWERTRAIN CONTROL MODULE under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - ODYSSEY article. If symptom/indication goes away, replace original PCM. If voltage reading is not about one volt, repair open in Blue/Green wire between cruise control unit and PCM connectors. See WIRING DIAGRAMS article.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.