2003 Acura 3.2CL BaseFACTORY OEM SERVICE PROCEDURE

Air Conditioning Signal: MDX

  1. Start engine. Turn blower on. Turn A/C on. With the Honda PGM Tester or the HDS, check A/C CLUTCH in the DATA list. If it is on, go to next step. If it is not on, see appropriate HVAC SYSTEMS-A/C PRESSURE SWITCH TEST article in AIR CONDITIONING & HEATING.
  2. Check the A/C system. If it is operating properly, the A/C system circuit is OK. If it is not operating properly, go to next step.
  3. Turn ignition off. Turn ignition on. With the Honda PGM Tester or the HDS, activate A/C CLUTCH in the INSPECTION menu. If a clicking noise is heard, go to appropriate AUTOMATIC A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING. If a clicking noise is not heard, go to next step.
  4. Turn ignition off. Disconnect PCM harness connector B. See Figure . Turn ignition on. With a fused jumper wire, momentarily connect PCM harness connector terminal B11 to ground several times. If a clicking noise is heard, update the PCM if it does not have the latest software. Substitute known-good PCM then recheck. If symptom or indication goes away, replace original PCM. If a clicking noise is not heard, check for poor connections or loose terminals at A/C clutch relay and PCM. If they are OK, check the A/C clutch relay and go to appropriate AUTOMATIC A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.