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.
DTC B1202: Climate Control Unit Internal Error
2009 Acura MDXSECTION DTC B1202: Climate Control Unit Internal Error
NOTE:
Check the battery condition (see
BATTERY TEST
) and the charging system (see
CHARGING SYSTEM INDICATOR CIRCUIT TROUBLESHOOTING
).
- Clear the DTC with the HDS.
- Turn the ignition switch to LOCK (0), and then ON (II).
- Wait for 6 seconds or more.
- Do the self-diagnostic with the HDS (see HOW TO USE THE SELF-DIAGNOSTIC FUNCTION WITH THE HDS ).
- Check for DTCs.
Is DTC B1202 indicated?
YES - The climate control unit is faulty, replace the climate control unit.
NO - Intermittent failure, the climate control unit is OK at this time.
RENDER: 1.0x
NO RELATED
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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.