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.
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HOMESERVICE MANUALSACURA20043.5RLREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCRUISE CONTROL SYSTEMSCIRCUIT TESTSCRUISE CONTROL COMMUNICATION CIRCUIT3.2TL
2004 Acura 3.5RL
Cruise Control Communication Circuit: 3.2TL
2004 Acura 3.5RLSECTION 3.2TL
- Drive vehicle at speed over 25 MPH. Activate and set cruise control. If cruise control operates, go to next step. If cruise control does not operate, check cruise control unit or cruise control actuator. See CRUISE CONTROL UNIT INPUT under SYSTEM TESTS. See CRUISE CONTROL ACTUATOR ASSEMBLY under COMPONENT TESTS.
- Backprobing, measure voltage between ground and cruise control unit 14-pin connector terminal No. 8 (Blue/Green wire). See Fig 1. If about one volt exists, go to next step. If about one volt does not exist, replace cruise control unit.
- Backprobing, measure voltage between ground and PCM 32-pin connector "A" terminal No. 5 (Blue/Green wire). See Fig 2. PCM is located below right center of instrument panel, behind carpet. If about one volt exists, check for loose PCM 32-pin connector "A". If connector is okay, substitute a known-good PCM and recheck. See PCM in appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE. If symptom goes away, replace original PCM. If about one volt does not exist, repair short or open in Blue/Green wire between PCM 32-pin connector "A" and cruise control unit connector.
RENDER: 1.0x
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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.